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1.
Cancer ; 129(24): 3894-3904, 2023 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-37807694

RESUMEN

BACKGROUND: Lung cancer is the leading cause of cancer deaths. Screening individuals who are at elevated risk using low-dose computed tomography reduces lung cancer mortality by ≥20%. Individuals who have community-based factors that contribute to an increased risk of developing lung cancer have high lung cancer rates and are diagnosed at younger ages. In this study of lung cancer in South Dakota, the authors compared the sensitivity of screening eligibility criteria for self-reported Indigenous race and evaluated the need for screening at younger ages. METHODS: US Preventive Services Task Force (USPSTF) 2013 and 2021 (USPSTF2013 and USPSTF2021) criteria and two versions of the PLCOm2012 risk-prediction model (based on the 2012 Prostate, Lung, Colorectal, and Ovarian [PLCO] Cancer Screening Trial), one with a predictor for race and one without, were applied at USPSTF-equivalent thresholds of ≥1.7% in 6 years and ≥1.0% in 6 years to 1565 individuals who were sequentially diagnosed with lung cancer (of whom 12.7% self-reported as Indigenous) at the Monument Health Cancer Care Institute in South Dakota (2010-2019). RESULTS: Eligibility sensitivities of USPSTF criteria did not differ significantly between individuals who self-reported their race as Indigenous and those who did not (p > .05). Sensitivities of both PLCOm2012 models were significantly higher than comparable USPSTF criteria. The sensitivity of USPSTF2021 criteria was 66.1% and, for comparable PLCOm2012 models with and without race, sensitivity was 90.7% and 89.6%, respectively (both p < .001); 1.4% of individuals were younger than 50 years, and proportions did not differ by Indigenous classification (p = .518). CONCLUSIONS: Disparities in screening eligibility were not observed for individuals who self-reported their race as Indigenous. USPSTF criteria had lower sensitivities for lung cancer eligibility. Both PLCOm2012 models had high sensitivities, with higher sensitivity for the model that included race. The PLCOm2012noRace model selected effectively in this population, and screening individuals younger than 50 years did not appear to be justified. PLAIN LANGUAGE SUMMARY: Lung cancer is the leading cause of cancer deaths. Studies show that using low-dose computed tomography scans to screen people who smoke or who used to smoke and are at elevated risk for lung cancer reduces lung cancer deaths. This study of 1565 individuals with lung cancer in South Dakota compared screening eligibility using US Preventive Services Task Force (USPSTF) criteria and a lung cancer risk-prediction model (PLCOm2012; from the 2012 Prostate, Lung, Colorectal, and Ovarian [PLCO] Cancer Screening Trial). The model had higher sensitivity and picked more people with lung cancer to screen compared with USPSTF criteria. Eligibility sensitivities were similar for individuals who self-reported as Indigenous versus those who did not between USPSTF criteria and the model.


Asunto(s)
Neoplasias Colorrectales , Neoplasias Pulmonares , Masculino , Humanos , Detección Precoz del Cáncer/métodos , Medición de Riesgo , South Dakota/epidemiología , Tamizaje Masivo/métodos , Neoplasias Colorrectales/complicaciones
2.
J Natl Cancer Inst ; 115(12): 1465-1474, 2023 12 06.
Artículo en Inglés | MEDLINE | ID: mdl-37707545

RESUMEN

The burden of cancer and access to effective treatment are not experienced equally by all in the United States. For underserved populations that often access the health-care system when their cancers are in advanced disease stages, radiation oncology services are essential. In 2001, the National Cancer Institute's (NCI's) Radiation Research Program created and implemented the Cancer Disparities Research Partnership Program (CDRP). CDRP was a pioneering funding model whose goal was to increase participation of medically underserved populations in NCI clinical trials. CDRP's Cooperative Agreement funding supported for awardees the planning, development, and conduct of radiation oncology clinical research in institutions not traditionally involved in NCI-sponsored research and cared for a disproportionate number of medically underserved, health-disparities populations. The awardee secured and provided support for mentorship from 1 of 2 NCI comprehensive cancer centers named in its application. Six CDRP awards were made over two 5-year funding periods ending in 2013, with the end-of-program accomplishments previously reported. With the current focus on addressing equity, diversity, and inclusion, the 6 principal investigators were surveyed, 5 of whom responded about the impact of CDRP on their institutions, communities, and personal career paths. The survey that was emailed included 10 questions on a 5-point Likert scale. It was not possible to collect patient data this long after completion of the program. This article provides a 20-year retrospective of the experiences and observations from those principal investigators that can inform those now planning, building, and implementing equity, diversity, and inclusion programs.


Asunto(s)
Neoplasias , Humanos , Estados Unidos , National Cancer Institute (U.S.) , Estudios Retrospectivos , Neoplasias/terapia , Atención a la Salud , Área sin Atención Médica
3.
JMIR Form Res ; 7: e47851, 2023 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-37471115

RESUMEN

BACKGROUND: Breast cancer is the most common cancer in the United States and the second leading cause of death for American Indian women. American Indian women have lower rates of breast cancer screening than other racial groups, and disparities in breast cancer mortality and survival rates persist among them. To address this critical need, a culturally appropriate, accessible, and personalized intervention is necessary to promote breast cancer screening among American Indian women. This study used mobile health principles to develop a mobile web app-based mammogram intervention (wMammogram) for American Indian women in a remote, rural community in the Northern Plains. OBJECTIVE: This study aimed to assess the feasibility and efficacy of the wMammogram intervention, which was designed to motivate American Indian women to undergo breast cancer screening, as compared with the control group, who received an educational brochure. METHODS: Using community-based participatory research (CBPR) principles and a multipronged recruitment strategy in a randomized controlled trial design, we developed the wMammogram intervention. This study involved 122 American Indian women aged between 40 and 70 years, who were randomly assigned to either the intervention group (n=62) or the control group (n=60). Those in the intervention group received personalized and culturally appropriate messages through a mobile web app, while those in the control group received an educational brochure. We measured outcomes such as mammogram receipt, intention to receive breast cancer screening after the intervention, and participants' satisfaction with and acceptance of the intervention. RESULTS: A significantly higher proportion of women who received the wMammogram intervention (26/62, 42%; P=.009) completed mammograms by the 6-month follow-up than the control group (12/60, 20%). The wMammogram intervention group, compared with the control group, reported significantly higher ratings on perceived effectiveness of the intervention (t120=-5.22; P<.001), increase in knowledge (t120=-4.75; P<.001), and satisfaction with the intervention (t120=-3.61; P<.001). Moreover, compared with the brochure group, the intervention group expressed greater intention to receive a mammogram in the future when it is due (62/62, 100% vs 51/60, 85%) and were more willing to recommend the intervention they received to their friends (61/62, 98.4% vs 54/60, 90%) with statistically significant differences. CONCLUSIONS: This study shows the feasibility and efficacy of the wMammogram intervention to promote breast cancer screening for American Indian women in a remote, rural community-based setting. Findings suggest that, with advancements in technology and the ubiquity of mobile devices, mobile web apps could serve as a valuable health intervention tool that builds upon low-cost technology and enhances accessibility and sustainability of preventive care to help reduce breast health disparities experienced in hard-to-reach American Indian populations. TRIAL REGISTRATION: ClinicalTrials.gov NCT05530603; https://clinicaltrials.gov/ct2/show/NCT05530603.

5.
Oncol Nurs Forum ; 50(3): 279-289, 2023 04 21.
Artículo en Inglés | MEDLINE | ID: mdl-37155972

RESUMEN

PURPOSE: To explore the perspectives on patient and family needs during cancer treatment and survivorship of American Indian (AI) cancer survivors, caregivers, Tribal leaders, and healers. PARTICIPANTS & SETTING: 36 AI cancer survivors from three reservations in the Great Plains region. METHODOLOGIC APPROACH: A community-based participatory research design was employed. Postcolonial Indigenous research techniques of talking circles and semistructured interviews were used to gather qualitative data. Data were analyzed using content analysis to identify themes. FINDINGS: The overarching theme of accompaniment was identified. The following themes were intertwined with this theme: (a) the need for home health care, with the subthemes of family support and symptom management; and (b) patient and family education. IMPLICATIONS FOR NURSING: To provide high-quality cancer care to AI patients in their home communities, oncology clinicians should collaborate with local care providers, relevant organizations, and the Indian Health Service to identify and develop essential services. Future efforts must emphasize culturally responsive interventions in which Tribal community health workers serve as navigators to accompany patients and families during treatment and in survivorship.


Asunto(s)
Supervivientes de Cáncer , Indígenas Norteamericanos , Neoplasias , Humanos , Indio Americano o Nativo de Alaska , Cuidadores , Cuidados Paliativos , Neoplasias/terapia
6.
Adv Radiat Oncol ; 8(4): 101188, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36974086

RESUMEN

Purpose: The COVID-19 pandemic has placed demands and limitations on the delivery of health care. We sought to assess the effect of COVID-19 on the delivery of gynecologic oncologic care from the perspective of practicing radiation oncologists in the United States. Methods and Materials: An anonymous online survey was created and distributed to preidentified radiation oncologists in the United States with clinical expertise in the management of gynecologic patients. The survey consisted of demographic questions followed by directed questions to assess specific patterns of care related to the COVID-19 pandemic. Results: A total of 47 of 96 invited radiation oncologists responded to the survey for a response rate of 49%. Fifty-six percent of respondents reported an increase in locally advanced cervical cancer with no similar increase for endometrial, vulvar, or vaginal patients. Most respondents (66%) reported a pause in surgical management, with a duration of 1 to 3 months being most common (61%). There was a reported increased use of shorter brachytherapy regimens during the pandemic. Most providers (61%) reported caring for at least 1 patient with a positive COVID-19 test. A pause or delay in treatment due to COVID-19 positivity was reported by 45% of respondents, with 55% reporting that patients chose to delay their own care because of COVID-19-related concerns. Total treatment times >8 weeks for patients with cervical cancer were observed by 33% of respondents, but occurred in >25% of patients. Conclusions: Data from this prospectively collected anonymous survey of practice patterns among radiation oncologists reveal that the COVID-19 pandemic resulted in delays initiating care, truncated brachytherapy treatment courses, and a reported increase in locally advanced cervical cancer cases at presentation. These data can be used as a means of self-assessment to ensure appropriate decision making for gynecologic patients during the endemic phase of COVID-19.

7.
S D Med ; 76(1): 16-23, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36897785

RESUMEN

Prostate cancer management is a critical component of men's health with ongoing controversies in screening and treatment. The purpose of this manuscript is to review contemporary evidence-based strategies in the management of localized prostate cancer to optimize patient outcomes, satisfaction, and shared decision making, to improve physician education and awareness, and to emphasize the importance of brachytherapy in the curative management of prostate cancer. The Bottom Line: 1. Selective screening and selective treatment reduces prostate cancer mortality rates. 2. Active surveillance is recommended for low risk prostate cancer. 3. Both radiation and surgery are appropriate options for patients with intermediate-risk and high-risk prostate cancer. 4. Quality of life and patient satisfaction favors brachytherapy for sexual function and urinary incontinence and surgery for urinary bother. 5. For patients with intermediate risk prostate cancer, brachytherapy achieves very high cure rates, acceptable sided effects, high patient satisfaction and is the most cost-effective treatment. 6. For patients with unfavorable intermediate-risk and high-risk prostate cancer, the combination of external beam radiation, brachytherapy, and ADT (Androgen Deprivation Therapy) achieves the highest rates of biochemical control and the lowest need for salvage therapies. 7. A collaborative shared decision making (SDM) process yields a well-informed, high-quality decision that is consistent with patients' preferences and value.


Asunto(s)
Braquiterapia , Neoplasias de la Próstata , Masculino , Humanos , Braquiterapia/efectos adversos , Neoplasias de la Próstata/terapia , Antagonistas de Andrógenos , Calidad de Vida , Resultado del Tratamiento , Antígeno Prostático Específico
8.
Urology ; 175: 90-95, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36898587

RESUMEN

OBJECTIVE: To evaluate the role of timing (either before or during initial consultation) on the effectiveness of decision aids (DAs) to support shared-decision-making in a minority-enriched sample of patients with localized prostate cancer using a patient-level randomized controlled trial design. METHODS: We conducted a 3-arm, patient-level-randomized trial in urology and radiation oncology practices in Ohio, South Dakota, and Alaska, testing the effect of preconsultation and within-consultation DAs on patient knowledge elements deemed essential to make treatment decisions about localized prostate cancer, all measured immediately following the initial urology consultation using a 12-item Prostate Cancer Treatment Questionnaire (score range 0 [no questions correct] to 1 [all questions correct]), compared to usual care (no DAs). RESULTS: Between 2017 and 2018, 103 patients-including 16 Black/African American and 17 American Indian or Alaska Native men-were enrolled and randomly assigned to receive usual care (n = 33) or usual care and a DA before (n = 37) or during (n = 33) the consultation. After adjusting for baseline characteristics, there were no statistically significant proportional score differences in patient knowledge between the preconsultation DA arm (0.06 knowledge change, 95% CI -0.02 to 0.12, P = .1) or the within-consultation DA arm (0.04 knowledge change, 95% CI -0.03 to 0.11, P = .3) and usual care. CONCLUSION: In this trial oversampling minority men with localized prostate cancer, DAs presented at different times relative to the specialist consultation showed no improvement in patient knowledge above usual care.


Asunto(s)
Técnicas de Apoyo para la Decisión , Neoplasias de la Próstata , Masculino , Humanos , Neoplasias de la Próstata/terapia , Derivación y Consulta , Ohio , Participación del Paciente , Toma de Decisiones
9.
Rep Pract Oncol Radiother ; 27(3): 583-588, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36186700

RESUMEN

Background: African-Americans have the highest overall cancer death rate and shortest survival time of any racial or ethnic group in the United States. The most common cancer studied in African-American radiation therapy (RT) access disparities research is breast cancer. The goal of this study is to evaluate the impact of patient navigation on RT access for African-American breast cancer patients. Material and methods: This study is a prospective survey-based evaluation of the impact of patient navigation on access to hypofractionated RT and financial toxicity in African-American breast cancer patients. The impact of patient navigation on RT access will be collated and analyzed from survey results pre-RT versus post-RT as well as for patients with versus without receipt of patient navigation. The validated COST-Functional Assessment of Chronic Illness Therapy score will be used to compare hypofractionation versus standard fractionated RT financial toxicity for patients with early-stage breast cancer who have received lumpectomy. Conclusion: This is the first study to investigate the impact of patient navigation on reducing RT access disparities facing African-American breast cancer patients. The natural progression of this work will be to expand this model to include additional breast cancer populations most vulnerable to suffering RT access disparities (Native American, Hispanic American, Appalachian) within the United States.

10.
Brachytherapy ; 21(3): 362-368, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35249823

RESUMEN

PURPOSE: To evaluate the prevalence of burnout among brachytherapy specialists and to identify factors associated with burnout. METHODS AND MATERIALS: An anonymous, online, cross-sectional survey was administered to non-trainee physician members of the American Brachytherapy Society. Burnout was evaluated using the validated Maslach Burnout Inventory-Human Services Survey (MBI-HSS). Demographic and practice-specific questions were collected from respondents. Univariate and multivariable analysis of outcomes were performed using probabilistic index models. RESULTS: Overall, 51 of 400 physicians responded (13% response rate). Fifty-seven percent of respondents demonstrated at least one symptom of professional burnout. However, only 6% of respondents met strict criteria for high burnout. Analysis of the individual MBI-HSS subdomains demonstrated higher subscale scores for emotional exhaustion and depersonalization, but also higher scores for personal accomplishment. On multivariable analysis after adjusting for increased feelings of burnout due to the COVID-19 pandemic or total hours of work per week, younger age was associated with both increased subscale scores for emotional exhaustion (p = 0.026) and lower personal accomplishment (p = 0.010). Lastly, nearly half of all respondents (47%) reported increased feelings of burnout due to the COVID-19 pandemic. Respondents from academic facilities were significantly more likely to report increased burnout due to COVID-19 compared to those from non-academic facilities (odds ratio, 7.04; 95% CI 1.60-31.0; p = 0.010). CONCLUSIONS: Nearly 60% of brachytherapists demonstrated symptoms of professional burnout, which is higher than other radiation oncology groups (academic chairs, program directors, residents). Managing stressors related to workload, COVID and support for junior physicians are potential areas for improving feelings of burnout.


Asunto(s)
Braquiterapia , Agotamiento Profesional , COVID-19 , Médicos , Braquiterapia/métodos , Agotamiento Profesional/diagnóstico , Agotamiento Profesional/epidemiología , Agotamiento Profesional/psicología , Estudios Transversales , Humanos , Satisfacción en el Trabajo , Pandemias , Prevalencia , Encuestas y Cuestionarios , Estados Unidos/epidemiología
11.
Cancer ; 128(6): 1242-1251, 2022 03 15.
Artículo en Inglés | MEDLINE | ID: mdl-34890060

RESUMEN

BACKGROUND: Decision aids (DAs) can improve knowledge for prostate cancer treatment. However, the relative effects of DAs delivered within the clinical encounter and in more diverse patient populations are unknown. A multicenter cluster randomized controlled trial with a 2×2 factorial design was performed to test the effectiveness of within-visit and previsit DAs for localized prostate cancer, and minority men were oversampled. METHODS: The interventions were delivered in urology practices affiliated with the NCI Community Oncology Research Program Alliance Research Base. The primary outcome was prostate cancer knowledge (percent correct on a 12-item measure) assessed immediately after a urology consultation. RESULTS: Four sites administered the previsit DA (39 patients), 4 sites administered the within-visit DA (44 patients), 3 sites administered both previsit and within-visit DAs (25 patients), and 4 sites provided usual care (50 patients). The median percent correct in prostate cancer knowledge, based on the postvisit knowledge assessment after the intervention delivery, was as follows: 75% for the pre+within-visit DA study arm, 67% for the previsit DA only arm, 58% for the within-visit DA only arm, and 58% for the usual-care arm. Neither the previsit DA nor the within-visit DA had a significant impact on patient knowledge of prostate cancer treatments at the prespecified 2.5% significance level (P = .132 and P = .977, respectively). CONCLUSIONS: DAs for localized prostate cancer treatment provided at 2 different points in the care continuum in a trial that oversampled minority men did not confer measurable gains in prostate cancer knowledge.


Asunto(s)
Participación del Paciente , Neoplasias de la Próstata , Toma de Decisiones , Técnicas de Apoyo para la Decisión , Humanos , Masculino , Prioridad del Paciente , Neoplasias de la Próstata/terapia , Derivación y Consulta
13.
JCO Oncol Pract ; 17(12): e1977-e1983, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34529516

RESUMEN

PURPOSE: The Radiation Oncology Alternative Payment Model (APM) is a Medicare demonstration project that will test whether prospective bundled payments to a randomly selected group of physician practices, hospital outpatient departments, and freestanding radiation therapy centers reduce overall expenditures while preserving or enhancing the quality of care for beneficiaries. The Model follows a complicated pricing methodology that blends historical reimbursements for a defined set of services made to professional and technical providers to create a weighted payment average for each of 16 cancer types. These averages are then adjusted by various factors to determine APM payments specific to each participating provider. METHODS: This impact study segregates APM participants into rural and urban groups and analyzes the effect of the Radiation Oncology Alternative Payment Model on their fee-for-service reimbursements. RESULTS: The main findings of this study are (1) the greater net-negative revenue impact on rural facilities versus urban facilities that would have participated in the Model this year and (2) the relative lack of high-value treatment services (ie, stereotactic radiotherapy and brachytherapy) delivered by rural facilities that exacerbates their negative impact. CONCLUSION: As such, rural providers participating in the Model in its current form may face greater risk to their economic viability and greater difficulty in funding technology improvements necessary for the achievement of high-quality care compared with their urban counterparts.


Asunto(s)
Oncología por Radiación , Anciano , Planes de Aranceles por Servicios , Gastos en Salud , Humanos , Medicare , Estudios Prospectivos , Estados Unidos
14.
Int J Radiat Oncol Biol Phys ; 109(3): 834-835, 2021 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-33516444
15.
Adv Radiat Oncol ; 5(6): 1093-1098, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33305069

RESUMEN

The increasing role of radiation oncology in optimal cancer care treatment brings to mind the adage that power is never a gift, but a responsibility. A significant part of the responsibility we in radiation oncology bear is how to ensure optimal access to our services. This article summarizes the discussion initiated at the 2019 American Society for Radiation Oncology Annual Meeting educational panel entitled "Improving the Clinical Treatment of Vulnerable Populations in Radiation Oncology: Latin, African American, Native American, and Gender/Sexual Minority Communities." By bringing the discussion to the printed page, we hope to continue the conversation with a broader audience to better define the level of responsibility our field bears in optimizing cancer care to the most vulnerable patient populations within the United States.

16.
Brachytherapy ; 19(6): 787-793, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33132070

RESUMEN

PURPOSE: Education and training on prostate brachytherapy for radiation oncology and medical physics residents in the United States is inadequate, resulting in fewer competent radiation oncology personnel to perform implants, and is a factor in the subsequent decline of an important, potentially curative cancer treatment modality for patients with cancer. The American Brachytherapy Society (ABS) leadership has recognized the need to establish a sustainable medical simulation low-dose-rate (LDR) and high-dose-rate (HDR) brachytherapy workshop program that includes physician-physicist teams to rapidly translate knowledge to establish high-quality brachytherapy programs. METHODS: The ABS, in partnership with industry and academia, has held three radiation oncology team-based LDR/HDR workshops composed of physician-physicist teams in Chicago in 2017, in Houston in 2018, and in Denver in 2019. The predefined key metric of success is the number of attendees who returned to their respective institutions and were actively performing brachytherapy within 6 months of the prostate brachytherapy workshop. RESULTS: Of the 111 physician/physicist teams participating in the Chicago, Houston, and Denver prostate brachytherapy workshops, 87 (78%) were actively performing prostate brachytherapy (51 [59%] HDR and 65 [75%] LDR). CONCLUSIONS: The ABS prostate brachytherapy LDR/HDR simulation workshop has provided a successful education and training structure for medical simulation of the critical procedural steps in quality assurance to shorten the learning curve for delivering consistently high-quality brachytherapy implants for patients with prostate cancer. An ABS initiative, intended to bend the negative slope of the brachytherapy curve, is currently underway to train 300 new competent brachytherapy teams over the next 10 years.


Asunto(s)
Braquiterapia/normas , Educación Médica Continua/métodos , Neoplasias de la Próstata/radioterapia , Garantía de la Calidad de Atención de Salud , Oncología por Radiación/educación , Sociedades Médicas , Braquiterapia/métodos , Braquiterapia/estadística & datos numéricos , Competencia Clínica , Humanos , Masculino , Médicos , Dosificación Radioterapéutica , Entrenamiento Simulado , Estados Unidos
17.
Brachytherapy ; 19(6): 820-826, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32928682

RESUMEN

The American Brachytherapy Society brachytherapy schools have been pivotal in teaching and evolving the art of brachytherapy over the past decades. Founded in 1995, the schools have consistently provided content for the major disease sites including gynecologic, prostate, and breast with ocular, vascular, head and neck, pediatric, intraluminal, systemic, and intraoperative approaches more selectively addressed. In addition, Physics schools, either coupled with clinical schools or as stand-alone venues, have provided an essential educational component for practicing physicists, a pivotal part of the brachytherapy team. Celebrating 25 years in existence, this historical overview of the American Brachytherapy Society brachytherapy schools is a tribute to the many teachers who have shared their expertise, to the many students who have been enthusiastic and interactive participants, and the staff who have made it all possible, with the reward of perpetuating the important and timely art of brachytherapy.


Asunto(s)
Braquiterapia , Física/educación , Oncología por Radiación/educación , Instituciones Académicas/historia , Sociedades Médicas/historia , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Estados Unidos
20.
Pract Radiat Oncol ; 10(5): 345-353, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32169590

RESUMEN

PURPOSE: This phase I/II, multi-institutional trial explored the tolerance and efficacy of stepwise increasing hypofractionation (HPFX) radiation therapy regimens for fraction sizes up to 4.3 Gy in localized prostate cancer. METHODS AND MATERIALS: Three escalating dose-per-fraction schedules were designed to yield similar predicted tumor control while maintaining equivalent predicted late toxicity. HPFX levels I, II, and III were carried out sequentially and delivered schedules of 64.7 Gy/22 fx/2.94 Gy, 58.08 Gy/16 fx/3.63 Gy, and 51.6 Gy/12 fx/4.3 Gy, respectively with next level escalations contingent upon acceptable gastrointestinal (GI) toxicity. The primary endpoints were biochemical control and toxicity. RESULTS: A total of 347 patients were recruited by 5 institutions with 101, 111, and 135 patients treated on HPFX levels I, II, and III with median follow-ups of 100, 85.5, and 61.7 months, respectively (83.2 months combined). The National Comprehensive Cancer Network low- or intermediate-risk group distribution was 46% and 54%, respectively. Sixteen percent of patients, primarily intermediate risk, received 6 months of androgen deprivation therapy. The 8-year nadir + 2 actuarial biochemical control rates for HPFX levels I, II, and III were 91.1% ± 3.0%, 92.7% ± 2.7%, and 88.5% ± 4.6%, respectively (Kaplan-Meier log rank, 0.903). Among clinical covariates, only Gleason score reached near significance in multivariate analysis (P = .054). Twenty-six patients failed biochemically (crude incidence of 7.5%), and there were 5 cause-specific deaths. GI and genitourinary toxicities were acceptable and similar across the 3 HPFX levels. The combined actuarial cumulative incidence of grade 2+ GI and genitourinary toxicities at 7 years were 16.3% ± 2.1% and 22.1% ± 2.4%, respectively. CONCLUSIONS: HPFX employing fraction sizes extending into the 3.6 to 4.3 Gy/fraction range can be delivered with excellent oncologic outcomes. Such schedules, positioned between moderate and ultra-HPFX, may provide additional options for patients wishing to avoid prolonged treatment schedules associated with conventionally fractionated radiation therapy for prostate cancer.


Asunto(s)
Neoplasias de la Próstata , Anciano , Anciano de 80 o más Años , Antagonistas de Andrógenos/uso terapéutico , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Antígeno Prostático Específico , Neoplasias de la Próstata/radioterapia , Hipofraccionamiento de la Dosis de Radiación , Sistema Urogenital
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