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1.
BMC Cancer ; 21(1): 215, 2021 Mar 02.
Article in English | MEDLINE | ID: mdl-33653306

ABSTRACT

BACKGROUND: Advances in curative treatment for breast, colorectal, NSCLC and prostate cancer have led to improvements in cancer survival. Cancer treatment and recovery time can vary depending on the recommended modalities and intensity of therapy. Our objective was to determine the current real world duration of curative treatments for the four common cancers. METHODS: A retrospective review was completed of patients referred to BC Cancer from 2010 to 2016, ≤ 65 years old, newly diagnosed with stage I-III breast, colorectal, NSCLC or prostate cancer who received curative intent treatment. Information was collected on baseline characteristics, date of diagnosis, surgery, type, duration and intent of both radiotherapy and chemotherapy. RESULTS: In total, 22,275 patients were included: 55.7% breast, 22.4% colorectal, 9.2% NSCLC, 12.7% prostate cancer. Stage I/II/III at diagnosis: breast 47.2/38.7/14.1%, colorectal 26.5/30.1/43.5%, NSCLC 46.5/18.1/35.4%, prostate 7.7/62.9/29.4%. Patients treated with definitive surgery only: breast 35.9%, colorectal 58%, NSCLC 52.2%, prostate 40.1%. The median duration of multimodality treatment was breast 24.6 weeks, colorectal 26.7 weeks, NSCLC 9.1 weeks, and prostate 6.0 weeks. CONCLUSIONS: Approximately half of patients who undergo curative cancer treatment require definitive radiotherapy or multimodality treatment. The median duration of therapy for the most commonly treated cancers ranged from 6.0-26.7 weeks. Multimodality curative treatment can be prolonged for selected cancers when accounting for the duration of adjuvant chemotherapy and radiotherapy and recovery time between modalities.


Subject(s)
Breast Neoplasms/therapy , Carcinoma, Non-Small-Cell Lung/therapy , Colorectal Neoplasms/therapy , Lung Neoplasms/therapy , Prostatic Neoplasms/therapy , Combined Modality Therapy , Female , Humans , Male , Middle Aged , Neoplasm Staging , Retrospective Studies , Time Factors
2.
Cancer Causes Control ; 28(10): 1105-1116, 2017 Oct.
Article in English | MEDLINE | ID: mdl-28887646

ABSTRACT

BACKGROUND: For First Nations (FN) peoples living in British Columbia (BC), little is known regarding cancer in the population. The aim of this study was to explore cancer incidence and survival in the FN population of BC and compare it to the non-FN population. METHODS: All new cancers diagnosed from 1993 to 2010 were linked to the First Nations Client File (FNCF). Age-standardized incidence rates (ASIR) and rate ratios, and 1- and 5-year cause-specific survival estimates and hazard ratios were calculated. Follow-up end date for survival was December 31, 2011 and follow-up time was censored at a maximum of 15 years. RESULTS: ASIR of colorectal cancer (male SRR = 1.42, 95% CI 1.25-1.61; female SRR = 1.21, 95% CI 1.06-1.38) and cervical cancer (SRR = 1.84, 95% CI 1.45-2.33) were higher overall in FN residents in BC, compared to non-FN residents. Incidence rates of almost all other cancers were generally similar or lower in FN populations overall and by sex, age, and period categories, compared to non-FN residents. Trends in ASIR over time were similar except for lung (increasing for FN, decreasing for non-FN) and colorectal cancers (increasing for FN, decreasing for non-FN). Conversely, survival rates were generally lower for FN, with differences evident for some cancer sites at 1 year following diagnosis. CONCLUSION: FN people living in BC face unique cancer issues compared to non-FN people. Higher incidence and lower survival associated with certain cancer types require further research to look into the likely multifaceted basis for these findings.


Subject(s)
Indians, North American/statistics & numerical data , Neoplasms/epidemiology , Aged , British Columbia/epidemiology , Female , Humans , Incidence , Male , Middle Aged , Proportional Hazards Models , Survival Rate
3.
Support Care Cancer ; 22(3): 751-61, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24221577

ABSTRACT

BACKGROUND: Few treatments have the potential to reduce the severity of radiation-induced mucositis in head and neck cancer patients. Some small studies have suggested that organic honey may be a useful preventive treatment. METHODS: This investigator-initiated double-blind randomized placebo-controlled trial investigated whether honey reduced the severity of radiation-induced oral mucositis (ROM). One hundred six head and neck cancer patients from the Vancouver and Sudbury Cancer Centers in Canada were randomized to swish, hold, and swallow either 5 ml of irradiated organic manuka honey or a placebo gel, four times a day throughout radiation treatment, plus seven more days. Severity of oral mucositis according to the Radiation Therapy Oncology Group (RTOG), World Health Organization (WHO), and Oral Mucositis Assessment Scale scales, weight, and subjects' symptom severity and quality of life were assessed weekly. Sialometry was performed at baseline and at the last study visit. RESULTS: One hundred six patients were recruited. Twenty-four did not attend any mucositis assessments. One was removed from the study because of off-study consumption of store-bought manuka honey. The remaining 81 patients had at least one mucositis assessment and were included in the analysis. Sixty-two percent of subjects received concurrent chemotherapy; 81 % were male. The groups were well-matched, and blinding was excellent. Dropouts were mostly due to nausea and were similar in both arms, with 78 % being able to tolerate the study products for more than 1 week. The dropout rate was 57 % in those who received honey and 52 % in those who received placebo gel. The dropout rate in those who had concurrent chemotherapy was 59 % and in those who only received radiation was 47 %. There was no statistically significant difference between the honey and placebo arms in any of the outcome indicators. Those who completed the study in both treatment arms had low rates of RTOG greater than or equal to grade 3 mucositis; 35 % in the honey group and 43 % in the placebo group. CONCLUSION: Despite promising earlier reports, manuka honey was not tolerated well by our patients and, even when used as directed, did not have a significant impact on the severity of ROM.


Subject(s)
Head and Neck Neoplasms/radiotherapy , Honey , Radiation Injuries/therapy , Stomatitis/therapy , Adult , Aged , Canada , Double-Blind Method , Female , Head and Neck Neoplasms/epidemiology , Humans , Male , Middle Aged , Radiotherapy/adverse effects , Stomatitis/etiology
4.
Int J Gynecol Cancer ; 24(2): 226-32, 2014 Feb.
Article in English | MEDLINE | ID: mdl-24401982

ABSTRACT

OBJECTIVE: Since the publication of International Collaborative Ovarian Neoplasm 3, various practice patterns have evolved with respect to practice patterns and survival among women with epithelial ovarian cancer in British Columbia, Canada. The objectives of this study were to evaluate different strategies for first-line chemotherapy in ovarian cancer and to determine their effect on survival at a population level. METHODS AND MATERIALS: This was a retrospective population-based cohort study of 854 women with epithelial ovarian cancer in British Columbia from 2005 to 2008. Details were ascertained on stage, grade, histotype, performance status, surgeon type, extent of debulking, first-line chemotherapy including type and number of cycles, and cause and date of death. A Cox regression model was used to evaluate the association of covariates on overall survival. RESULTS: Of the 817 women eligible for chemotherapy, 729 (89.2%) received treatment, including 106 (14.5%) women who received single-agent carboplatin and 623 (85.5%) women who received combination platinum-based chemotherapy. Chemotherapy was evaluated as a time-varying covariate. Median numbers of single-agent carboplatin and combination chemotherapy cycles were 5 (range, 1-11) and 6 (range, 1-12), respectively. After adjustment for demographic, disease, and treatment factors, the covariates significantly associated with survival were stage, performance status, extent of debulking, and chemotherapy type. Single-agent carboplatin had a mortality hazards ratio of 5.15 (95% confidence interval, 2.39-11.11) relative to combination chemotherapy. CONCLUSIONS: In this population-based study, first-line platinum-based combination chemotherapy was associated with improved survival compared with single-agent carboplatin after adjustment for covariates in ovarian cancer. Higher rates of combination chemotherapy may improve outcomes at a population level.


Subject(s)
Antineoplastic Agents/administration & dosage , Antineoplastic Combined Chemotherapy Protocols , Carboplatin/administration & dosage , Carcinoma/drug therapy , Ovarian Neoplasms/drug therapy , Aged , British Columbia/epidemiology , Carcinoma/mortality , Female , Humans , Middle Aged , Ovarian Neoplasms/mortality , Retrospective Studies
5.
Thorax ; 68(6): 551-64, 2013 Jun.
Article in English | MEDLINE | ID: mdl-23399908

ABSTRACT

BACKGROUND: The authors consider whether differences in stage at diagnosis could explain the variation in lung cancer survival between six developed countries in 2004-2007. METHODS: Routinely collected population-based data were obtained on all adults (15-99 years) diagnosed with lung cancer in 2004-2007 and registered in regional and national cancer registries in Australia, Canada, Denmark, Norway, Sweden and the UK. Stage data for 57 352 patients were consolidated from various classification systems. Flexible parametric hazard models on the log cumulative scale were used to estimate net survival at 1 year and the excess hazard up to 18 months after diagnosis. RESULTS: Age-standardised 1-year net survival from non-small cell lung cancer ranged from 30% (UK) to 46% (Sweden). Patients in the UK and Denmark had lower survival than elsewhere, partly because of a more adverse stage distribution. However, there were also wide international differences in stage-specific survival. Net survival from TNM stage I non-small cell lung cancer was 16% lower in the UK than in Sweden, and for TNM stage IV disease survival was 10% lower. Similar patterns were found for small cell lung cancer. CONCLUSIONS: There are comparability issues when using population-based data but, even given these constraints, this study shows that, while differences in stage at diagnosis explain some of the international variation in overall lung cancer survival, wide disparities in stage-specific survival exist, suggesting that other factors are also important such as differences in treatment. Stage should be included in international cancer survival studies and the comparability of population-based data should be improved.


Subject(s)
Lung Neoplasms/mortality , Neoplasm Staging , Population Surveillance , Adolescent , Adult , Age Distribution , Aged , Aged, 80 and over , Australia/epidemiology , Canada/epidemiology , Denmark/epidemiology , Female , Humans , Lung Neoplasms/pathology , Male , Middle Aged , Norway/epidemiology , Retrospective Studies , Survival Rate/trends , Sweden/epidemiology , Young Adult
6.
Acta Oncol ; 52(5): 919-32, 2013 Jun.
Article in English | MEDLINE | ID: mdl-23581611

ABSTRACT

BACKGROUND: Large international differences in colorectal cancer survival exist, even between countries with similar healthcare. We investigate the extent to which stage at diagnosis explains these differences. METHODS: Data from population-based cancer registries in Australia, Canada, Denmark, Norway, Sweden and the UK were analysed for 313 852 patients diagnosed with colon or rectal cancer during 2000-2007. We compared the distributions of stage at diagnosis. We estimated both stage-specific net survival and the excess hazard of death up to three years after diagnosis, using flexible parametric models on the log-cumulative excess hazard scale. RESULTS: International differences in colon and rectal cancer stage distributions were wide: Denmark showed a distribution skewed towards later-stage disease, while Australia, Norway and the UK showed high proportions of 'regional' disease. One-year colon cancer survival was 67% in the UK and ranged between 71% (Denmark) and 80% (Australia and Sweden) elsewhere. For rectal cancer, one-year survival was also low in the UK (75%), compared to 79% in Denmark and 82-84% elsewhere. International survival differences were also evident for each stage of disease, with the UK showing consistently lowest survival at one and three years. CONCLUSION: Differences in stage at diagnosis partly explain international differences in colorectal cancer survival, with a more adverse stage distribution contributing to comparatively low survival in Denmark. Differences in stage distribution could arise because of differences in diagnostic delay and awareness of symptoms, or in the thoroughness of staging procedures. Nevertheless, survival differences also exist for each stage of disease, suggesting unequal access to optimal treatment, particularly in the UK.


Subject(s)
Colorectal Neoplasms/mortality , Delayed Diagnosis/statistics & numerical data , Registries , Adolescent , Adult , Aged , Aged, 80 and over , Australia/epidemiology , Canada/epidemiology , Colorectal Neoplasms/pathology , Denmark/epidemiology , Developed Countries , Female , Health Status Disparities , Humans , Male , Middle Aged , Neoplasm Staging , Norway/epidemiology , Prognosis , Sweden/epidemiology , United Kingdom/epidemiology , Young Adult
7.
Int J Gynecol Cancer ; 23(2): 282-7, 2013 Feb.
Article in English | MEDLINE | ID: mdl-23295939

ABSTRACT

OBJECTIVE: There are significant regional differences in survival outcomes across British Columbia among women with ovarian cancer. The age-adjusted hazard ratio for mortality is 1.27 (95% confidence interval, 1.08-1.49) in 1 health authority region compared to the provincial mean. The objective of this study was to look at variations in the treatment of epithelial ovarian cancer among the 5 health authority regions in the province of British Columbia and determine their effect on survival. METHODS AND MATERIALS: This was a population-based retrospective cohort study of all incident cases of epithelial ovarian cancer diagnosed in British Columbia from 2005 to 2008. Health authority regions were compared with the χ(2) test for demographic and disease characteristics, as well as treatment practices including assessment by a gynecologic oncologist, rate of optimal debulking, and proportion receiving platinum-based combination chemotherapy. Multivariable Cox regression analysis evaluated the effect of covariates on survival. RESULTS: There were 854 evaluable patients. Across health authority regions, there were significant differences in disease characteristics, including the proportion with serous histotype (44.0%-60.7%, P = 0.043) and stage IIIC/IV disease (50.3%-69.4%, P = 0.0048). There were also significant differences in treatment, including the proportion of patients assessed by a gynecologic oncologist (56.8%-79.4%, P = 0.0003), rate of suboptimal debulking, (21.4%-60.2%, P = 0.0036), and the proportion receiving combination chemotherapy, (61.5%-81.9%, P < 0.0001). Cox regression model revealed that stage, grade, optimal debulking, and combination chemotherapy were significantly associated with survival. The health authority region with the highest mortality had the lowest rate of optimal debulking and combination chemotherapy. CONCLUSIONS: Differences in survival rates for ovarian cancer across British Columbia can be attributed to variations in disease characteristics and treatment, particularly rates of optimal debulking and combination chemotherapy.


Subject(s)
Neoplasms, Glandular and Epithelial/diagnosis , Neoplasms, Glandular and Epithelial/therapy , Ovarian Neoplasms/diagnosis , Ovarian Neoplasms/therapy , Aged , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , British Columbia/epidemiology , Carcinoma, Ovarian Epithelial , Cohort Studies , Female , Geography , Gynecologic Surgical Procedures/statistics & numerical data , Health Services Accessibility/statistics & numerical data , Healthcare Disparities/statistics & numerical data , Humans , Middle Aged , Neoplasms, Glandular and Epithelial/epidemiology , Neoplasms, Glandular and Epithelial/mortality , Ovarian Neoplasms/epidemiology , Ovarian Neoplasms/mortality , Prognosis , Retrospective Studies , Survival Rate , Treatment Outcome
8.
Can J Surg ; 56(5): E135-41, 2013 Oct.
Article in English | MEDLINE | ID: mdl-24067529

ABSTRACT

BACKGROUND: In Canada, provincial cancer registries have been established to provide rigorous population-based data for patients with colorectal cancer. Databases maintained by regional cancer agencies contain a broader scope of information and have been used as a surrogate source of information for colorectal cancer research. It is unclear whether these data can be reliably extrapolated to all patients affected by colorectal cancer. We sought to determine whether patients included in a referral-based database are systematically different from patients who are not included. METHODS: We conducted a retrospective cohort study to compare patients referred to the British Columbia Cancer Agency with those who were not referred. Comparison was based on age, sex and geographic location. We used univariate and logistic regression analysis to identify significant differences between the cohorts. RESULTS: Univariate analysis demonstrated that the referral and nonreferral cohorts differed in sex, age and geographic location. For patients with rectal cancer, the referral and nonreferral cohorts varied in age and geographic location. Multivariate analysis demonstrated significant differences in age and geographic location but not sex for patients with colon and rectal cancer. CONCLUSION: Patients included in the referral database differed in age and geographic location from those included only in the provincial database. Studies using large data sets from referral centres must be interpreted with caution and may not be representative of the entire patient population.


CONTEXTE: Au Canada, on a établi des registres provinciaux en oncologie pour générer des données représentatives rigoureuses au sujet des patients atteints de cancer colorectal. Les bases de données maintenues par les agences régionales du cancer contiennent un éventail plus large de renseignements et ont servi de source de données de substitution pour la recherche sur le cancer colorectal. Or, on ignore s'il est possible d'extrapoler ces données de manière fiable à tous les patients atteints de cancer colorectal. Nous avons voulu déterminer si les patients inclus dans une base de données de référence sont systématiquement différents des patients qui n'y figurent pas. MÉTHODES: Nous avons procédé à une étude de cohorte rétrospective pour comparer les patients référés à l'agence de lutte contre le cancer de la Colombie-Britanniqueà ceux qui n'y avaient pas été référés. La comparaison reposait sur l'âge, le sexe et l'emplacement géographique. Nous avons utilisé une analyse de régression univariée et logistique pour dégager les différences significatives entre les cohortes. RÉSULTATS: L'analyse univariée a démontré que les cohortes référée et non référée différaient aux plans du sexe, de l'âge et de l'emplacement géographique. Pour les patients atteints d'un cancer rectal, les cohortes référée et non référée variaient selon l'âge et l'emplacement géographique. L'analyse multivariée a révélé des différences significatives aux plans de l'âge et de l'emplacement géographique, mais non au plan du sexe en ce qui concerne les patients atteints de cancer du côlon et du rectum. CONCLUSION: Les patients inclus dans la base de données de référence étaient différents de ceux qui ne figuraient que dans la base de données provinciale, pour ce qui est de l'âge et de l'emplacement géographique. Il faut interpréter avec prudence lesétudes reposant sur d'importantes séries de données provenant de centres de référence, car elles pourraient ne pas être représentatives de toute la population de patients.


Subject(s)
Adenocarcinoma/drug therapy , Cancer Care Facilities , Carcinoma in Situ/drug therapy , Colonic Neoplasms/drug therapy , Health Services Research , Outcome Assessment, Health Care , Rectal Neoplasms/drug therapy , Referral and Consultation/statistics & numerical data , Registries , Adult , Aged , Aged, 80 and over , British Columbia , Female , Health Services Accessibility , Humans , Logistic Models , Male , Middle Aged , Multivariate Analysis , Retrospective Studies
9.
Stud Health Technol Inform ; 183: 98-103, 2013.
Article in English | MEDLINE | ID: mdl-23388263

ABSTRACT

Understanding the impact of treatment policies on patient outcomes is essential in improving all aspects of patient care. The BC Cancer Agency is a provincial program that provides cancer care on a population basis for 4.5 million residents. The Lung and Head & Neck Tumour Groups planned to create a generic yet comprehensive software infrastructure that could be used by all Tumour Groups: the Outcomes and Surveillance Integration System (OaSIS). The primary goal was the development of an integrated database that will amalgamate existing provincial data warehouses of varying datasets and provide the infrastructure to support additional routes of data entry, including clinicians from multiple-disciplines, quality of life and survivorship data from patients, and three dimensional dosimetric information archived from the radiotherapy planning and delivery systems. The primary goal is to be able to capture any data point related to patient characteristics, disease factors, treatment details and survivorship, from the point of diagnosis onwards. Through existing and novel data-mining techniques, OaSIS will support unique population based research activities by promoting collaborative interactions between the research centre, clinical activities at the cancer treatment centres and other institutions. This will also facilitate initiatives to improve patient outcomes, decision support in achieving operational efficiencies and an environment that supports knowledge generation.


Subject(s)
Data Mining/methods , Database Management Systems , Databases, Factual , Information Storage and Retrieval/methods , Neoplasms/epidemiology , Registries , Software , Canada/epidemiology , Humans , Software Design
10.
Disaster Med Public Health Prep ; 17: e565, 2023 Dec 22.
Article in English | MEDLINE | ID: mdl-38131186

ABSTRACT

OBJECTIVE: As coronavirus disease 2019 (COVID-19) spread, efforts were made to preserve resources for the anticipated surge of COVID-19 patients in British Columbia, Canada. However, the relationship between COVID-19 hospitalizations and access to cancer surgery is unclear. In this project, we analyze the impact of COVID-19 patient volumes on wait time for cancer surgery. METHODS: We conducted a retrospective study using population-based datasets of regional surgical wait times and COVID-19 patient volumes. Weekly median wait times for urgent, nonurgent, cancer, and noncancer surgeries, and maximum volumes of hospitalized patients with COVID-19 were studied. The results were qualitatively analyzed. RESULTS: A sustained association between weekly median wait time for priority and other cancer surgeries and increase hospital COVID-19 patient volumes was not qualitatively discernable. In response to the first phase of COVID-19 patient volumes, relative to pre-COVID-19 pandemic levels, wait time were shortened for urgent cancer surgery but increased for nonurgent surgeries. During the second phase, for all diagnostic groups, wait times returned to pre-COVID-19 pandemic levels. During the third phase, wait times for all surgeries increased. CONCLUSION: Cancer surgery access may have been influenced by other factors, such as policy directives and local resource issues, independent of hospitalized COVID-19 patient volumes. The initial access limitations gradually improved with provincial and institutional resilience, and vaccine rollout.


Subject(s)
COVID-19 , Neoplasms , Humans , British Columbia/epidemiology , Waiting Lists , Retrospective Studies , Pandemics , COVID-19/epidemiology , Neoplasms/epidemiology , Neoplasms/surgery
11.
Gynecol Oncol ; 127(1): 75-82, 2012 Oct.
Article in English | MEDLINE | ID: mdl-22750127

ABSTRACT

OBJECTIVE: We investigate what role stage at diagnosis bears in international differences in ovarian cancer survival. METHODS: Data from population-based cancer registries in Australia, Canada, Denmark, Norway, and the UK were analysed for 20,073 women diagnosed with ovarian cancer during 2004-07. We compare the stage distribution between countries and estimate stage-specific one-year net survival and the excess hazard up to 18 months after diagnosis, using flexible parametric models on the log cumulative excess hazard scale. RESULTS: One-year survival was 69% in the UK, 72% in Denmark and 74-75% elsewhere. In Denmark, 74% of patients were diagnosed with FIGO stages III-IV disease, compared to 60-70% elsewhere. International differences in survival were evident at each stage of disease; women in the UK had lower survival than in the other four countries for patients with FIGO stages III-IV disease (61.4% vs. 65.8-74.4%). International differences were widest for older women and for those with advanced stage or with no stage data. CONCLUSION: Differences in stage at diagnosis partly explain international variation in ovarian cancer survival, and a more adverse stage distribution contributes to comparatively low survival in Denmark. This could arise because of differences in tumour biology, staging procedures or diagnostic delay. Differences in survival also exist within each stage, as illustrated by lower survival for advanced disease in the UK, suggesting unequal access to optimal treatment. Population-based data on cancer survival by stage are vital for cancer surveillance, and global consensus is needed to make stage data in cancer registries more consistent.


Subject(s)
Ovarian Neoplasms/mortality , Ovarian Neoplasms/pathology , Aged , Australia/epidemiology , Canada/epidemiology , Female , Humans , Middle Aged , Neoplasm Staging , Norway/epidemiology , Ovarian Neoplasms/diagnosis , Survival Analysis , United Kingdom/epidemiology
12.
HPB (Oxford) ; 14(5): 310-6, 2012 May.
Article in English | MEDLINE | ID: mdl-22487068

ABSTRACT

INTRODUCTION: A pancreaticoduodenectomy is the reference treatment for a resectable pancreatic head ductal adenocarcinoma. The probability of 5-year survival in patients undergoing such treatment is 5-25% and is associated with relatively high peri-operative morbidity and mortality. The objective of the present study was to evaluate risk factors predictive of outcome for patients undergoing a pancreaticoduodenectomy for a pancreatic adenocarcinoma. METHODS: This retrospective analysis incorporated data from the Vancouver General Hospital and the British Columbia Cancer Agency (BCCA) from 1999-2007. RESULTS: The 5-year survival of 100 patients was 12% with a median survival of 16.5 months. Ninety-day mortality was 7%. Predictors of 90-day mortality included age ≥ 80 years (P < 0.001) and an American Society of Anesthesiologists (ASA) score = 3 (P= 0.012) by univariate analysis and age ≥80 years (P < 0.001) by multivariate analysis. The identifiable predictive factor for poor 5-year survival was an ASA score = 3 (P= 0.043) whereas a Dindo-Clavien surgical complication grade ≥ 3 was associated with a worse outcome (P= 0.013). Referral to the BCCA was associated with a favourable 5-year survival (P= 0.001). CONCLUSIONS: The present study identifies risk factors for patient selection to enhance survival benefit in this patient population.


Subject(s)
Carcinoma, Pancreatic Ductal/surgery , Pancreatic Neoplasms/surgery , Pancreaticoduodenectomy , Age Factors , Aged , Aged, 80 and over , British Columbia , Carcinoma, Pancreatic Ductal/mortality , Carcinoma, Pancreatic Ductal/pathology , Female , Humans , Kaplan-Meier Estimate , Male , Multivariate Analysis , Pancreatic Neoplasms/mortality , Pancreatic Neoplasms/pathology , Pancreaticoduodenectomy/adverse effects , Pancreaticoduodenectomy/mortality , Proportional Hazards Models , Retrospective Studies , Risk Assessment , Risk Factors , Time Factors , Treatment Outcome
13.
Heliyon ; 8(12): e12140, 2022 Dec.
Article in English | MEDLINE | ID: mdl-36506364

ABSTRACT

Objective: We evaluated survival outcomes for patients with cancer and COVID-19 in this population-based study. Methods: A total of 631 patients who tested positive for severe acute respiratory syndrome coronavirus 2 and were seen at BC Cancer between 03/03/2020 and 01/21/2021 were included, of whom 506 had a diagnosis of cancer and PCR-confirmed positive test for coronavirus disease 2019. Patient clinical characteristics were retrospectively reviewed and the influence of demographic data, cancer diagnosis, comorbidities, and anticancer treatment(s) on survival following severe acute respiratory syndrome coronavirus 2 infection were analyzed. Results: Age ≥65 years (Hazard Ratio [HR] 4.77, 95% Confidence Interval [CI] 2.72-8.35, P < 0.0001), those with Eastern Cooperative Oncology Group Performance Status ≥2 (HR 8.36, 95% CI 2.89-24.16, P < 0.0001), hypertension (HR 3.17, 95% CI 1.77-5.66, P < 0.0001), and metastatic/advanced stage (HR 3.70, 95% CI 1.77-7.73, P < 0.0001) were associated with worse coronavirus disease 2019 specific survival outcomes following severe acute respiratory syndrome coronavirus 2 infection. Patients with lung cancer had the highest 30-day COVID-19 specific mortality (25.0%), followed by genitourinary (18.1%), gastrointestinal (16.0%), and other cancer types (<10.0%). Patients with the highest 30-day coronavirus disease 2019 specific mortality according to treatment type were those on chemotherapy (23.0%), rituximab (22.2%), and immunotherapy (16.7%) while patients on hormonal treatments (2.2%) had better survival outcomes (P = 0.041) compared to those on other anticancer treatments. Conclusion: This study provides further evidence that patients with cancer are at increased risk of mortality from coronavirus disease 2019 and emphasizes the need for vaccination.

14.
Can J Surg ; 53(4): 225-31, 2010 Aug.
Article in English | MEDLINE | ID: mdl-20646395

ABSTRACT

BACKGROUND: In a province-wide audit of patients undergoing treatment for rectal cancer in British Columbia in 1996, the 4-year rate of pelvic recurrence for stage 3 rectal cancer was 27%. The management guidelines were changed in 2002 to include adjuvant short-course preoperative radiation and total mesorectal excision surgical techniques. Education workshops were held to implement the protocol change. METHODS: We performed a provincial audit of rectal cancer cases for patients treated in the year after the protocol change, and we compared the pelvic recurrence rates with those from the audit performed in 1996. RESULTS: During a 12-month period beginning Oct. 1, 2003, a total of 367 patients underwent radical resection of rectal cancer with a curative intent. Preoperative adjuvant radiotherapy was used in 54% of cases (197/367). Median follow-up was 34.5 months, and 91% of patients were followed for at least 2 years. Relative to the 1996 cohort, there was a decreasing trend in 2-year overall pelvic recurrence rates in the 2003/04 cohort (9.6% v. 6.9%) and a significant decrease in recurrence among patients with stage 3 cancers (18.2% v. 9.2%; p = 0.020). Use of adjuvant radiation increased significantly (37% v. 65%; p < 0.001), and negative radial margins were achieved in 87% (319/367) of cases. CONCLUSION: The rates of pelvic recurrence were improved after changes in the management guidelines advocating increased use of total mesorectal excision surgery and preoperative radiation. Knowledge translation with an integrated strategy among surgeons and medical and radiation oncologists was successful in improving population outcomes among patients with rectal cancer.


Subject(s)
Adenocarcinoma/therapy , Antineoplastic Agents/therapeutic use , Colectomy/methods , Rectal Neoplasms/therapy , Adenocarcinoma/epidemiology , Adenocarcinoma/pathology , Adult , Aged , Aged, 80 and over , British Columbia/epidemiology , Female , Follow-Up Studies , Humans , Incidence , Male , Middle Aged , Neoplasm Recurrence, Local/epidemiology , Neoplasm Staging , Preoperative Care/methods , Radiotherapy, Adjuvant , Rectal Neoplasms/epidemiology , Rectal Neoplasms/pathology , Retrospective Studies , Treatment Outcome , Young Adult
15.
J Can Assoc Gastroenterol ; 3(6): 288-292, 2020 Dec.
Article in English | MEDLINE | ID: mdl-33241182

ABSTRACT

OBJECTIVE: To assess the performance of a fecal immunochemical test (FIT) among participants of a population-based colorectal cancer (CRC) screening program with one or more first-degree relatives (FDR) with CRC. METHODS: Asymptomatic 50 to 74 years olds with a FDR diagnosed with CRC, enrolled in a colon screening program completed FIT (two samples, cut-off 20 µg Hemoglobin/gram feces) and underwent colonoscopy. FIT-interval CRCs were identified from the British Columbia cancer registry. Logistic regression analysis was used to identify variables associated with the detection of CRC and high-risk polyps (nonmalignant findings that required a 3-year surveillance colonoscopy) in those patients undergoing FIT and colonoscopy. RESULTS: Of the 1387 participants with a FDR with CRC, 1244 completed FIT with a positivity rate of 10.8%, 52 declined FIT but underwent colonoscopy and 90 declined screening. Seven CRCs were identified: six in patients with a positive FIT, one in a patient who only had colonoscopy. No CRCs were found in patients with a negative FIT. The positive and negative predictive values of FIT in the detection of CRC were 4.8% and 100%, respectively. On multivariate logistic regression, positive FIT, and not type of family history, was the only variable associated with detection of CRC or high-risk polyps. At 2-year follow-up, there was no FIT interval cancer detected in the study cohort. CONCLUSION: FIT is more strongly associated with high-risk findings on colonoscopy than type of family history. FIT may be an alternative screening strategy to colonoscopy in individuals with a single FDR with CRC.

16.
Healthc Manage Forum ; 22(4): 40-50, 2009.
Article in English | MEDLINE | ID: mdl-20166520

ABSTRACT

Patient satisfaction is an important component in the evaluation of health services provided to patients. This study evaluates the results of a patient satisfaction survey collected over five years in a radiation therapy department. The analysis identifies that satisfaction has improved in almost all areas, but there is room for improvement in others. The key findings are the importance of treating patients with courtesy and respect and the relatively lower levels of satisfaction noted for patients treated with palliative intent, an area of concern given these patients' greater needs. We provide aggregate results, identify factors that influence overall satisfaction and demonstrate how the survey results have led to quality improvement initiatives, which in turn have resulted in improved levels of satisfaction for patients.


Subject(s)
Patient Satisfaction , Radiology Department, Hospital , Adult , Aged , Female , Health Care Surveys , Humans , Male , Middle Aged
17.
Can J Gastroenterol ; 22(4): 393-8, 2008 Apr.
Article in English | MEDLINE | ID: mdl-18414715

ABSTRACT

To investigate the recent trends in definitive management of esophageal cancer, the records of 138 consecutive patients treated with radical intent in a single institution between 1995 and 2003 were reviewed and analyzed. The median follow-up period was 5.7 years (range 1.1 to 10.4 years). Seventy-seven patients were treated with radiation therapy (RT) only and 61 with combined regimens (CRT), in which RT was combined with either radical surgery or chemotherapy, or both. The overall survival of the entire cohort was 32% over two years and 20% over five years. The survivorship in the RT group was 17% over two years and 5% over five years. In the CRT group, 51% and 35% survived over two and five years, respectively. From all the potential prognostic factors examined by univariate and multivariate analyses, only male sex and use of CRT were strongly associated with better survivorship. There was no significant difference in the outcomes among the different regimens of CRT. Survivorship was not affected by the location or histology of the tumour, clinical stage, dose of RT or use of endoluminal brachytherapy in addition to external beam RT. There was a greater tendency to use RT only more often in older patients, but patient age did not affect survivorship. The proportion of patients treated with CRT did not change significantly over the last versus the first four years of the observed period. Combined regimens are undoubtedly superior to RT as a single modality. The long-term survivorship of patients in a subgroup of our patients treated with combined modality protocols compared favourably with the previously reported results in the literature and specifically in prospective randomized trials. However, the optimal combined modality regimen is yet to be defined.


Subject(s)
Esophageal Neoplasms/mortality , Esophageal Neoplasms/radiotherapy , Adult , Aged , Aged, 80 and over , Antineoplastic Agents/therapeutic use , Cohort Studies , Combined Modality Therapy/mortality , Esophageal Neoplasms/drug therapy , Esophageal Neoplasms/surgery , Female , Humans , Male , Middle Aged , Neck Dissection/mortality , Retrospective Studies , Survival Analysis
18.
Am J Surg ; 215(5): 857-861, 2018 05.
Article in English | MEDLINE | ID: mdl-29496204

ABSTRACT

BACKGROUND: Breast cancer surgeries have traditionally been documented in narrative reports. Narrative reports have been shown to be incomplete. Synoptic reports utilize standardized templates to record data and have emerged as an alternative to narrative reports. This study evaluates the uptake and impact of synoptic reporting for breast cancer surgery in a community care setting. METHODS: A retrospective review of operative reports documenting breast cancer surgeries over a consecutive 3-year period. RESULTS: 772 narrative reports and 158 synoptic reports were reviewed. Synoptic reports were associated with a higher degree of overall completeness (60% vs 45%) when compared to narrative reports. 6 out of 7 surgeons that produced at least 5 synoptic and 5 narrative reports had increases in completeness with use of synoptic reporting. CONCLUSIONS: Use of synoptic reporting improves breast cancer operative report completeness and decreases superfluous content when compared to narrative reports. While synoptic report uptake during the study period was suboptimal there exists several means by which it can be improved, including investment in information technology infrastructure and emphasis on stakeholder engagement.


Subject(s)
Breast Neoplasms/surgery , Medical Records Systems, Computerized/standards , Adult , Aged , British Columbia , Female , Humans , Mastectomy/methods , Middle Aged , Narration , Quality Improvement , Retrospective Studies
19.
Radiother Oncol ; 83(1): 18-24, 2007 Apr.
Article in English | MEDLINE | ID: mdl-17368844

ABSTRACT

BACKGROUND AND PURPOSE: To compare post-implant dosimetry between high density source implants (HDI) and low density source implants (LDI). MATERIALS AND METHOD: Dosimetric analysis of the whole prostate (V200, V150, V100, D90, D80, contiguous V200 and V150, external index), prostate quadrants (V200, V150, V100, D90), rectum (V150, V120, V100, V80, V60) and deviated surrogate urethra (V200, V150, V120, V100, V80) was performed on 39 consecutive prostate brachytherapy LDI and 39 volume matched HDI over the same time period. The distinction between LDI and HDI was based on differing prescribed dose using 125-Iodine sources, with MPD of 115 and 144 Gy, respectively, using a fixed source strength of 0.424 U (0.334 mCi). Cases were contoured by two independent blinded observers. Repeated measures analysis of variance was used to look at the effects of treatment arm, observer and their interaction. RESULTS: Whole prostate (WP) volume did not differ significantly between the treatment arms, mean of 25.4 cc for LDI and 26.6 cc for HDI. There was no significant difference in any of the measured post-implant dosimetric parameters for the WP or quadrants, surrogate urethra or rectum. CONCLUSIONS: No difference in post-implant dosimetric parameters was observed between Iodine 125 LDI and HDI. Neither dose homogeneity nor conformality is compromised with a lower source density. Higher strength sources have the potential for considerable cost saving and reduced morbidity.


Subject(s)
Brachytherapy , Prostate/radiation effects , Prostatic Neoplasms/radiotherapy , Humans , Iodine Radioisotopes/therapeutic use , Male , Radiotherapy Dosage , Urethra/radiation effects
20.
Brachytherapy ; 6(2): 135-41, 2007.
Article in English | MEDLINE | ID: mdl-17434107

ABSTRACT

PURPOSE: To evaluate the clinical impact of pathology review before prostate brachytherapy. METHODS AND MATERIALS: Original and reviewing pathologists' reports were retrospectively collected from 1323 men treated with prostate brachytherapy between July 1998 and October 2005 at one institution. Statistical analysis was performed pre- and post-January 2002. The clinical impact of pathology review was evaluated. RESULTS: Gleason Score (GS) change (GS(Delta)) occurred in 25.2% (334) of cases; GS increased in 21.6%, decreased in 2.4%, and diagnosed malignancy in 1.2% of cases. Post-2002, concordance in attributed GS improved, with GS(Delta) of 31.9-20.6%, respectively (p<0.001), and a reduction in the average GS(Delta) (p<0.001). The clinical impact was substantial with management changing in 14.8% of cases. CONCLUSION: Concordance between the original and reviewing pathologists' GS has improved during the study period. Nevertheless, discordance persists in one of five cases. Pathology review remains essential, if treatment decisions hinge on GS.


Subject(s)
Brachytherapy , Pathology, Clinical , Prostatic Intraepithelial Neoplasia/pathology , Prostatic Intraepithelial Neoplasia/radiotherapy , Prostatic Neoplasms/pathology , Prostatic Neoplasms/radiotherapy , Referral and Consultation , British Columbia , Humans , Longitudinal Studies , Male , Neoplasm Staging , Observer Variation , Pathology, Clinical/trends , Prostatic Intraepithelial Neoplasia/epidemiology , Prostatic Neoplasms/epidemiology , Referral and Consultation/trends , Research Design , Retrospective Studies , Urogenital System/pathology
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