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1.
J Am Coll Nutr ; 39(2): 147-154, 2020 02.
Article in English | MEDLINE | ID: mdl-31291164

ABSTRACT

Objective: Short-term studies in adults have shown that white potatoes increase satiety and suppress food intake (FI) compared with several other carbohydrate-containing foods; however, studies are limited in children. The objective was to compare the effects of white potatoes in mixed meals on satiety, FI, and glycemic response in 9-14-year-old children and adolescents.Methods: Using a within-subject, repeated-measures design, 21 children completed five counter-balanced test sessions. After an overnight fast, children consumed one of four isocaloric treatment meals (450 kcal) of French fries, mashed potatoes, or white beans served with a fixed portion of egg omelet (30 g of protein), a control meal with cereal, milk, and bread, or continued to fast (i.e., meal skipping). Subjective appetite was measured using visual analogue scales. FI at an ad libitum pizza meal at 180 min and rest of day diet record were used to measure lunch FI and rest of day energy intake, respectively. Total daily energy intake was calculated by adding the energy intake from the treatment meal, the ad libitum pizza lunch, and rest of day food record. Capillary blood samples were collected to assess glycemic response over 180 min.Results: Change from baseline subjective average appetite scores were lower after mashed potatoes compared with all other treatment conditions (p < 0.001), and higher after French fries compared with white beans (p = 0.04). Lunch FI (kcal) was significantly lower (p < 0.001) after French fries (1010±73) and mashed potatoes (1039±74) compared with the control meal (1257±92) and meal skipping (1235±74). Total daily energy intake (kcal) was lower after French fries compared with the control meal (2228±141 vs. 2624±137; p = 0.04). Change from baseline blood glucose was lower after white beans and French fries compared with mashed potatoes (p < 0.05) and the control meal (p < 0.001).Conclusion: In conclusion, white potatoes with eggs increased satiety, decreased short-term FI, and resulted in similar energy intakes compared with meal skipping.


Subject(s)
Blood Glucose/analysis , Dietary Carbohydrates/administration & dosage , Eating/physiology , Eggs , Satiation/physiology , Solanum tuberosum , Adolescent , Child , Cooking/methods , Energy Intake , Female , Humans , Male , Meals , Plant Tubers
3.
Laryngoscope ; 127(11): 2528-2533, 2017 11.
Article in English | MEDLINE | ID: mdl-28397269

ABSTRACT

OBJECTIVES/HYPOTHESIS: To evaluate disparities in overall survival (OS) between Asian and non-Asian patients diagnosed with non-nasopharyngeal head and neck cancer (HNC). STUDY DESIGN: This was a population-based, retrospective study of patients diagnosed with non-nasopharyngeal HNC of squamous cell carcinoma histology between 2001 and 2010 in British Columbia, Canada. METHODS: Using Kaplan-Meier methods and Cox regression models, we examined the relationship between race and OS. RESULTS: A total of 3,036 patients were included in the study. Median age was 64 years, 74% were men, and 7% were Asians. Asians had worse Eastern Cooperative Oncology Group (ECOG) status (29% vs. 23%, P = .07) and larger tumors (33% vs. 21%, P = .02), and were more likely to be diagnosed with oral cavity cancers (38% vs. 25%, P < .001) than non-Asians. Asians were also less likely to receive multimodality therapy than non-Asians (90% vs. 95%, P = .02). Asians were more likely to have never smoked (49% vs. 15%, P < .001) and to be married or with a partner (80% vs. 69%, P = .02). Multivariate models showed that Asians had better OS than non-Asians (hazard ratio [HR] = 0.50, 95% confidence interval [CI] = 0.25-0.99, P = .05). Three-year OS did not differ significantly between Asians and non-Asians (41% vs. 42%, P = .18); however, 5-year OS did (22% vs. 19% P = .03). Stratifying by treatment type, outcomes were comparable in both groups except for radiotherapy alone, where Asians showed significantly better OS (HR = 0.71, 95% CI = 0.51-0.99, P = .04). Advanced age, worse ECOG, greater tumor size, and lack of treatment also correlated with inferior OS. CONCLUSIONS: Despite several worse prognostic features and less aggressive treatment, Asians tended to exhibit better OS than non-Asians. LEVEL OF EVIDENCE: 2c. Laryngoscope, 127:2528-2533, 2017.


Subject(s)
Asian People , Carcinoma, Squamous Cell/ethnology , Carcinoma, Squamous Cell/therapy , Head and Neck Neoplasms/ethnology , Head and Neck Neoplasms/therapy , Carcinoma, Squamous Cell/mortality , Female , Head and Neck Neoplasms/mortality , Humans , Male , Middle Aged , Prognosis , Retrospective Studies , Survival Rate , Treatment Outcome
4.
J Manag Care Spec Pharm ; 23(2): 195-205, 2017 Feb.
Article in English | MEDLINE | ID: mdl-28125366

ABSTRACT

BACKGROUND: A variety of regimens are used as first-line treatment in patients with advanced non-small cell lung cancer (NSCLC), which may include combination regimens and single agents, depending on histology, molecular profile, and performance status. OBJECTIVE: To describe the types of first-line therapies and compare overall survival between therapies used for patients with advanced NSCLC in an integrated health care system. METHODS: This retrospective cohort study included patients aged 18 years or older from Kaiser Permanente California with a diagnosis of stage IIIB/IV NSCLC. First systemic treatment date occurred from January 1, 2008, through September 30, 2013. Overall survival was measured as the number of months from initial treatment until death, end of enrollment, or September 30, 2014. Treatment regimens were categorized into 6 mutually exclusive groups: platinum doublets; pemetrexed-based, bevacizumab-based, and pemetrexed + bevacizumab-based combinations; singlets; and tyrosine-kinase inhibitors (TKIs). Survival was compared using Kaplan-Meier curves and adjusted Cox proportional hazard models. Subgroup analyses were performed by age group and by nonsquamous histology. RESULTS: Of 2,081 patients, approximately half (52.3%) received platinum doublets, followed by TKIs (19.0%), pemetrexed-based regimens (13.4%), bevacizumab-regimens (8.0%), singlets (5.5%), and pemetrexed + bevacizumab-based combinations (1.8%). Median survival was longest for pemetrexed + bevacizumab-based combinations (18.5 months), followed by bevacizumab-based regimens (14.5), TKIs (12.7), pemetrexed-based regimens (10.4), doublets (9.2), and singlets (5.3). There was a significantly reduced risk of mortality for pemetrexed + bevacizumab-based combinations (HR = 0.64; 95% CI = 0.42-0.94) and TKIs (HR = 0.83; 95% CI = 0.73-0.94) compared with doublets. Singlets were associated with an increased risk of mortality (HR = 1.50; 95% CI = 1.22-1.84). Subgroup analysis among patients aged 65 years and over found no significant differences among treatment groups, with the exception of singlets, which were associated with an increased risk of mortality compared with doublets (HR = 1.51; 95% CI = 1.20-1.90). Among patients under aged 65 years, pemetrexed + bevacizumab-based combinations (HR = 0.36; 95% CI = 0.21-0.64) and TKIs (HR = 0.76; 95% CI = 0.59-0.97) were associated with a reduced risk of mortality, and singlets were associated with an increased risk (HR = 1.85; 95% CI = 1.17-2.92). CONCLUSIONS: In this cohort of patients with advanced NSCLC, patients received a platinum agent with or without bevacizumab or pemetrexed, a TKI, or a single agent. Younger patients (aged < 65 years) receiving bevacizumab + pemetrexed-based combinations had a survival advantage over those receiving platinum doublets, and this finding merits further investigation. Younger patients receiving TKIs also had longer survival. Compared with platinum doublets, we found no survival advantage for older patients receiving bevacizumab or pemetrexed, which suggests that combination therapy of a platinum agent and taxane, such as carboplatin and paclitaxel, could be a reasonable option for older patients who are not candidates for targeted therapy. DISCLOSURES: No outside funding supported this study. Rashid has received past funding from Bristol-Myers Squibb, Astellas, Novartis, and Pfizer. No other authors report any potential financial conflicts of interest. Study concept and design were primarily contributed by Spence and Hui, with input from the other authors. Hui, Spence, and Rashid took the lead in data collection, and data interpretation was performed by Schottinger, Millares, and Spence, assisted by the other authors. The manuscript was written primarily by Spence, along with Chang, and revised by Spence, with input from the other authors.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Carcinoma, Non-Small-Cell Lung/drug therapy , Carcinoma, Non-Small-Cell Lung/mortality , Lung Neoplasms/drug therapy , Lung Neoplasms/mortality , Aged , Antibodies, Monoclonal, Humanized/administration & dosage , Bevacizumab/administration & dosage , Bridged-Ring Compounds/administration & dosage , Carboplatin/administration & dosage , Female , Humans , Kaplan-Meier Estimate , Male , Middle Aged , Paclitaxel/administration & dosage , Pemetrexed/administration & dosage , Proportional Hazards Models , Retrospective Studies , Taxoids/administration & dosage
5.
J Rural Health ; 33(4): 393-401, 2017 09.
Article in English | MEDLINE | ID: mdl-27717002

ABSTRACT

OBJECTIVES: Optimal treatment of rectal cancer (RC) requires multidisciplinary care. We examined whether distance to treatment center or community size impacts access to multimodality care and population-based outcomes in RC. METHODS: Patients diagnosed with stage II/III RC from 1999 to 2009 and treated at 1 of 6 regional cancer centers in British Columbia were reviewed. Distance to treatment center was determined for each patient. Communities were classified as rural, small, medium, and large population centers. Logistic and Cox regression models assessed associations of distance and community size with treatment received as well as cancer-specific (CSS) and overall survival (OS). RESULTS: Of 3,158 patients, 93.6% underwent surgery, 86.3% received radiotherapy, and 51.3% were treated with adjuvant chemotherapy (AC). Median time from diagnosis to oncologic consultation was longer for those >100 km from a treatment center or residing in medium/rural communities. Logistic regression demonstrated no correlation between distance or community size and receipt of treatment modality. Univariate analysis showed similar CSS (P = .18, .88) and OS (P = .36, .47) based on community size and distance, respectively. In multivariate analysis, distance >100 km had inferior CSS (Hazard Ratio [HR] 1.39, 95% CI: 1.03-1.88; P = .031). There was no consistent trend between decreasing community size and outcomes; however, living in a small center was associated with improved OS (HR 0.58, 95% CI: 0.38-0.88; P = .011) and CSS (HR 0.42, 95% CI: 0.25-0.70; P = .001). CONCLUSIONS: In this population-based study, there were no urban-rural differences in access to multidisciplinary care, but increased distance may be associated with worse cancer-specific outcomes.


Subject(s)
Health Services Accessibility/statistics & numerical data , Rectal Neoplasms/therapy , Rural Population/statistics & numerical data , Travel/statistics & numerical data , Aged , Aged, 80 and over , British Columbia/epidemiology , Female , Health Services Accessibility/standards , Health Status Disparities , Humans , Logistic Models , Male , Middle Aged , Multivariate Analysis , Proportional Hazards Models , Rectal Neoplasms/epidemiology , Rectal Neoplasms/mortality , Statistics, Nonparametric , Urban Population/statistics & numerical data
6.
Psychooncology ; 25(12): 1470-1476, 2016 12.
Article in English | MEDLINE | ID: mdl-26387559

ABSTRACT

BACKGROUND: Prior survivorship research has largely focused on issues faced by survivors of childhood tumors, breast cancers, or hematologic malignancies. Relatively little is known about the needs of other prevalent survivor groups. Our aim was to identify the specific concerns of colorectal cancer (CRC) survivors in the key domains of physical functioning, psychological wellbeing, and social relationships. METHODS: We conducted focus groups with stage II and III CRC survivors who had completed their primary active anti-cancer treatments. Patients were asked to describe how their diagnosis and treatment impacted their lives, to outline deficiencies in the care that they received, and to suggest ways of addressing any unmet needs. A content analysis was subsequently conducted to identify major themes. RESULTS: Thirty CRC survivors participated in six focus groups. Individuals reported some degree of dissatisfaction with the amount and type of diagnostic and treatment information they received at their initial clinic visit. Distress from toxicities, such as peripheral neuropathy, was also common among the survivors. Similarly, the majority faced challenges adjusting to their lives and daily activities, especially in caring for their colostomy. Having survived CRC, many survivors expressed an interest in advocacy and health promotion of CRC. CONCLUSIONS: CRC survivors face many barriers after their cancer treatment. Issues with colostomy are unique to this survivor group. Interventions to improve CRC survivorship care should also incorporate opportunities for patient advocacy. Copyright © 2015 John Wiley & Sons, Ltd.


Subject(s)
Cancer Survivors/psychology , Colorectal Neoplasms/pathology , Colorectal Neoplasms/psychology , Focus Groups , Health Services Needs and Demand , Quality of Life/psychology , Adaptation, Psychological , Adult , Aged , Colorectal Neoplasms/diagnosis , Colorectal Neoplasms/therapy , Colostomy/psychology , Combined Modality Therapy/psychology , Female , Humans , Male , Middle Aged , Patient Care Team , Patient Satisfaction , Qualitative Research , Social Support
7.
Clin Colorectal Cancer ; 15(1): 16-23, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26281943

ABSTRACT

BACKGROUND: Weight modification after a diagnosis of colon cancer and its impact on outcomes remain unclear. Thus we aimed to examine the association of obesity and weight changes from baseline oncology consultation with recurrence-free survival (RFS) and overall survival (OS) in patients with stage III colon cancer. METHODS: Patients aged ≥ 18 years who were diagnosed with stage III colon cancer in British Columbia from 2008 to 2010 and who received adjuvant chemotherapy were included in the study. Cox proportional hazards regression models were fitted to evaluate the impact of different body compositions and degree of weight changes from baseline assessment with outcomes while controlling for potentially confounding covariates, such as age and sex. RESULTS: A total of 539 patients with stage III colon cancer were included: median age was 69 years (range, 26-94 years), 52% were men, and 53% had Eastern Cooperative Oncology Group (ECOG) performance status of 0-1. Those with weight gains of ≥ 10% had a median RFS of 37 months compared with 49 months in those with weight gains of < 10% (hazard ratio [HR], 0.94; 95% confidence interval [CI], 0.56-1.59; P = .82). However, this finding was not significant. In Cox models, patients who exhibited weight losses of ≥ 10% experienced significantly inferior RFS (HR, 3.45; 95% CI, 1.44-8.13; P = .0046) and OS (HR, 2.63; 95% CI, 1.04-6.67; P = .041) compared with those who experienced weight losses of < 10%. Weight gains, losses, or changes of equal or less magnitude did not show any significant associations with outcomes (all P > .05). CONCLUSIONS: Weight losses of ≥ 10% from baseline evaluation bodes a worse prognosis among patients with stage III colon cancer.


Subject(s)
Adenocarcinoma/diagnosis , Colonic Neoplasms/diagnosis , Weight Gain , Weight Loss , Adenocarcinoma/mortality , Adenocarcinoma/pathology , Adult , Aged , Aged, 80 and over , British Columbia , Colonic Neoplasms/mortality , Colonic Neoplasms/pathology , Databases, Factual , Disease-Free Survival , Female , Humans , Male , Middle Aged , Neoplasm Staging , Prognosis , Proportional Hazards Models
8.
Support Care Cancer ; 24(3): 1199-208, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26286113

ABSTRACT

PURPOSE: Bevacizumab may potentiate the risk of venous thromboembolisms (VTEs) in cancer patients, who are already predisposed to pro-thrombotic states. We aimed to characterize the incidence of VTEs in a population-based cohort of metastatic colorectal cancer (mCRC) patients treated with bevacizumab, describe patient and treatment factors associated with VTEs, and examine how VTEs are managed. METHODS: Patients diagnosed with mCRC from 2006 to 2009 and offered bevacizumab were included. Descriptive statistics were used to describe VTE occurrences and management. Univariate and multivariate regression models were constructed to explore associations between clinical factors and VTEs. RESULTS: We identified 541 mCRC patients: 27 never started bevacizumab and 15 were lost to follow-up. Of the 499 evaluable patients, median age was 61, 59.3% were men, 88.1% had ECOG 0/1, and 5.2% reported previous VTEs. Mean number of bevacizumab doses was 13.3 cycles. After receiving bevacizumab, 81 patients developed 93 cases of VTEs, with 9 patients experiencing >1 event. Individuals who experienced VTEs were more likely to have had pre-existing cardiovascular disease (OR 2.259, p = 0.0245), resection of primary cancer (OR 3.262, p = 0.0269), pre-chemotherapy platelet count ≥350,000/µL (OR 2.295, p = 0.0293), and received >12 bevacizumab cycles (OR 2.172, p = 0.0158). Use of bevacizumab varied after occurrence of VTE where it was discontinued in 34.4%, continued in 34.4%, and temporarily held in 1.1%. CONCLUSIONS: VTE risk can be high, especially in patients with specific pre-treatment risk factors as well as in those who received more bevacizumab, suggesting a potential dose-related effect. Management of bevacizumab-related VTEs was variable.


Subject(s)
Angiogenesis Inhibitors/adverse effects , Bevacizumab/adverse effects , Venous Thromboembolism/chemically induced , Venous Thromboembolism/epidemiology , Adult , Aged , Aged, 80 and over , Angiogenesis Inhibitors/therapeutic use , Bevacizumab/therapeutic use , Colorectal Neoplasms/drug therapy , Female , Humans , Incidence , Male , Middle Aged , Risk Factors , Venous Thromboembolism/therapy , Venous Thrombosis/epidemiology , Young Adult
9.
Support Care Cancer ; 24(2): 799-805, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26184500

ABSTRACT

PURPOSE: There are concerns regarding potential negative effects of prophylactic treatment of epidermal growth factor receptor (EGFR)-inhibitor-related rashes on metastatic colorectal cancer (mCRC) outcomes. We aimed to characterize treatment patterns of EGFR-inhibitor-induced rashes and evaluate prophylactic versus reactive approaches to rash management in relation to overall survival (OS). METHODS: Patients diagnosed with KRAS wild-type mCRC from July 2010 to June 2012 in British Columbia and prescribed cetuximab or panitumumab were reviewed to describe patterns of use of oral antibiotics and steroid creams. Using Cox regression, the relationship between prophylactic versus reactive rash management and OS was characterized. RESULTS: A total 119 patients were analyzed: median age was 63 years, 61 % were male, 34 % received cetuximab, 66 % received panitumumab, and median number of EGFR inhibitor treatment was nine cycles. Rash occurred in >90 % of patients, and reactive was favored over prophylactic treatment (66 vs. 34 %). Older patients and those with Eastern Cooperative Oncology Group (ECOG) performance status 0/1 were more likely to receive prophylactic creams (44 vs. 20 % for age <60, p = 0.01) and oral antibiotics (62 vs. 12 % for ECOG ≥2, p = 0.01), respectively. Median OS was 7.0 months. The number of treatment cycles and OS were similar in both prophylactic and reactive groups (both p > 0.05). In Cox regression, ECOG >2 correlated with worse survival (hazard ratio (HR) 22.01, 95 % confidence interval (CI) 5.25-92.30, p < 0.01). However, survival outcomes were similar between patients prescribed antibiotics prophylactically versus reactively (HR = 1.10, 95 % CI 0.43-2.80, p = 0.85), and steroid creams prophylactically versus reactively (HR = 2.00, 95 % CI 0.58-6.92, p = 0.27). CONCLUSION: Prophylactic treatment of EGFR-inhibitor-related rashes is associated with similar outcomes compared to reactive rash treatment in mCRC.


Subject(s)
Acneiform Eruptions/drug therapy , Antineoplastic Agents/adverse effects , Colorectal Neoplasms/drug therapy , Drug Therapy/methods , ErbB Receptors/antagonists & inhibitors , Exanthema/drug therapy , Neoplasm Metastasis/drug therapy , Acneiform Eruptions/chemically induced , Acneiform Eruptions/prevention & control , Aged , Antibodies, Monoclonal/adverse effects , British Columbia , Cetuximab/adverse effects , Exanthema/chemically induced , Exanthema/prevention & control , Female , Humans , Male , Middle Aged , Panitumumab , Treatment Outcome
10.
BMC Gastroenterol ; 15: 123, 2015 Sep 30.
Article in English | MEDLINE | ID: mdl-26423366

ABSTRACT

BACKGROUND: Demand for endoscopic procedures scheduled with anesthesia is increasing and no-show to appointments carries significant patient health and financial impact, yet little is known about predictors of no-show. METHODS: We performed a 16-month retrospective observational cohort study of patients scheduled for outpatient endoscopy with anesthesia at a county hospital serving the safety-net healthcare system of San Francisco. Multivariate logistic regression analysis was performed to evaluate associations between attendance and predictors of no-show. RESULTS: In total, 511 patients underwent endoscopy with anesthesia during the study period. Twenty-seven percent of patients failed to attend an appointment and were considered "no-show". In multivariate analysis, higher no-show rates were associated with patients with a prior history of no-show (odds ratio [OR] 6.4; 95% confidence interval [CI], 2.4- 17.5), those with active substance abuse within the past year (OR 2.2; 95% CI 1.4-3.6), those with heavy prescription opioids/benzodiazepines use (OR 1.6; 95% CI 1.0-2.6) and longer wait-times (OR 1.05; 95% CI 1.00-1.09). Inversely associated with patient no-show were active employment (OR 0.38; 95% CI 0.18-0.81), patients who attended a pre-operative appointment with an anesthesiologist (OR 0.52; CI 0.32-0.85), and those undergoing an advanced endoscopic procedure (OR 0.43; 95% CI 0.19-0.94). CONCLUSION: In a safety-net healthcare population, behavioral and social determinants of health, including missed appointments, active substance abuse, homelessness, and unemployment are associated with no-shows to endoscopy with anesthesia.


Subject(s)
Ambulatory Care/statistics & numerical data , Anesthesia/statistics & numerical data , Endoscopy, Gastrointestinal/statistics & numerical data , Hospitals, County/statistics & numerical data , No-Show Patients/statistics & numerical data , Adult , Aged , Analgesics, Opioid/therapeutic use , Benzodiazepines/therapeutic use , Employment/statistics & numerical data , Female , Humans , Male , Middle Aged , Retrospective Studies , Safety-net Providers/statistics & numerical data , San Francisco , Substance-Related Disorders/epidemiology , Time Factors , Waiting Lists
11.
Breast Cancer Res Treat ; 152(2): 419-27, 2015 Jul.
Article in English | MEDLINE | ID: mdl-26070268

ABSTRACT

We aim to (1) compare compliance of anastrozole, letrozole, exemestane, and tamoxifen in women and (2) identify clinical factors associated with medication non-adherence and non-persistence. Female Medicare beneficiaries who were new users of anastrozole, letrozole, exemestane, or tamoxifen between 2007 and 2010 were analyzed. Multivariate-modified Poisson and Cox regression models were constructed to compare non-adherence and non-persistence, respectively, across the different oral agents. A total of 5,150 women were included: mean age was 76.4 years, 2352 initiated anastrozole, 1401 letrozole, 248 exemestane, and 1149 tamoxifen. Non-adherence and non-persistence were 41 and 49% respectively, with exemestane being associated with the worst non-adherence and non-persistence (RR 1.57, 95% CI 1.37-1.80, p < 0.001; HR 1.93, 95% CI 1.63-2.30, respectively, p < 0.001), followed by letrozole (RR 1.39, 95% CI 1.26-1.53, p < 0.001; HR 1.47, 95% CI 1.32-1.64, respectively, p < 0.001), and anastrozole (RR 1.16, 95% CI 1.05-1.27, p = 0.003; HR 1.14, 95%CI 1.03-1.27, respectively, p = 0.011), whereas tamoxifen was associated with the best compliance. Use of statins and osteoporosis medications was correlated with improved adherence (RR 0.89, 95 % CI 0.82-0.96, p = 0.002 and RR 0.84, 95 % CI 0.76-0.92, p < 0.001, respectively, for non-adherence) and persistence (HR 0.86, 95 % CI 0.79-0.94, p < 0.001 and HR 0.86, 95 % CI 0.78-0.96, p = 0.005, respectively, for non-persistence), but chronic kidney disease was correlated with worse non-persistence (HR 1.15, 95 % CI 1.04-1.33, p = 0.04). Age ≥ 70 years was also associated with worse compliance. Compliance to oral hormonal therapy varied depending on the type of agent, age, and concurrent medications, highlighting specific opportunities to improve adherence and persistence in older women with breast cancer.


Subject(s)
Antineoplastic Agents, Hormonal/therapeutic use , Breast Neoplasms/drug therapy , Breast Neoplasms/epidemiology , Medication Adherence , Administration, Oral , Age Factors , Aged , Aged, 80 and over , Female , Humans , Medicare , United States/epidemiology
12.
Epilepsia ; 48(7): 1351-9, 2007 Jul.
Article in English | MEDLINE | ID: mdl-17573925

ABSTRACT

PURPOSE: To compare pharmacokinetics and tolerability of levetiracetam (LEV) in older versus younger adults. METHODS: As part of the Columbia Antiepileptic Drug Database, we retrospectively studied the pharmacokinetics and tolerability of LEV in patients who had been seen as an outpatient at our center during a 4-year period. We compared apparent clearance (CL) of LEV in the youngest (16-31 years; n=151) and oldest (55-88 years; n=157) quartile of 629 adult outpatients who had taken LEV. We also analyzed the frequency of adverse effects leading to dose change or discontinuation ("intolerability") and specific adverse effects in the younger versus older adults. One-year retention was determined for younger and older adults newly started on LEV at our center. RESULTS: Mean LEV CL differed significantly between older (46.5 ml/h/kg) and younger adults (78.3 ml/h/kg). On average, older patients had a 40% lower LEV CL than younger patients. Comedication with an enzyme-inducing antiepileptic drug (EIAED; mostly carbamazepine) was associated with a 24% higher clearance of LEV compared to those who were not on EIAEDs. This difference was 37% in a subgroup of patients whose LEV CL was compared while they were on and off EIAEDs. Stepwise linear regression identified younger age and comedication with an EIAED as significant predictors of increased LEV CL. A total of 34.3% of the 629 patients (31.7% of younger vs. 40.7% of older patients; p=0.16) reported intolerability to LEV on at least one occasion. This difference in tolerability reached significance in the group of patients newly started on LEV (26.3% vs. 41.0%; p=0.017). Drowsiness and psychiatric/behavioral side effects were the most common adverse effects associated with LEV use in both age groups. One-year retention was 72% in the older group vs. 54% in the younger group (not significant). CONCLUSION: Older adults have lower CL than younger adults and require a mean 40% lower dose of LEV to achieve the same serum level. Comedication with an EIAED increases LEV CL by 24-37%. Younger adults tolerate LEV better than older adults, but 1-year retention was (nonsignificantly) higher in the older group.


Subject(s)
Anticonvulsants/pharmacokinetics , Epilepsy/drug therapy , Piracetam/analogs & derivatives , Adolescent , Adult , Age Factors , Aged , Aged, 80 and over , Ambulatory Care , Anticonvulsants/adverse effects , Anticonvulsants/therapeutic use , Dose-Response Relationship, Drug , Drug Therapy, Combination , Enzyme Induction/drug effects , Epilepsy/blood , Epilepsy/diagnosis , Female , Humans , Levetiracetam , Male , Metabolic Clearance Rate/drug effects , Metabolic Clearance Rate/physiology , Middle Aged , Piracetam/adverse effects , Piracetam/pharmacokinetics , Piracetam/therapeutic use , Retrospective Studies
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