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1.
Pract Radiat Oncol ; 9(4): e407-e416, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30826480

RESUMEN

PURPOSE: Incident learning systems (ILSs) require substantial time and effort to maintain, risking staff burnout and ILS disuse. Herein, we assess the durability of ILS-associated safety culture improvements and ILS engagement at 5 years. METHODS AND MATERIALS: A validated survey assessing safety culture was administered to all staff of an academic radiation oncology department before starting ILS and annually thereafter for 5 years. The survey consists of 70 questions assessing key cultural domains, overall patient safety grade, and barriers to incident reporting. A χ2 test was used to compare baseline scores before starting the ILS (pre-ILS) with the aggregate 5 years during which ILS was in use (with ILS). ILS engagement was measured by the self-reported number of ILS entries submitted in the previous 12 months. RESULTS: The survey response rate was ≥68% each year (range, 68%-80%). High-volume event reporting was sustained (4673 reports; average of 0.9 ILS entries per treatment course). ILS engagement increased, with 43% of respondents submitting reports during the 12 months pre-ILS compared with 64% with ILS in use (P < .001). Significant improvements (pre- vs. with-ILS) were observed in the cultural domains of patient safety perceptions (25% vs 39%; P < .03), and responsibility and self-efficacy (43% vs 60%; P < .01). The overall patient safety grade of very good or excellent significantly increased (69% vs 85%; P < .01). Significant reductions were seen in the following barriers to error reporting: embarrassment in front of colleagues, getting colleagues into trouble, and effect on department reputation. CONCLUSIONS: Comprehensive incident learning was sustained over 5 years and is associated with significant durable improvements in metrics of patient safety culture.


Asunto(s)
Seguridad del Paciente/estadística & datos numéricos , Gestión de Riesgos/métodos , Administración de la Seguridad/estadística & datos numéricos , Humanos , Aprendizaje , Factores de Tiempo
2.
Am J Clin Oncol ; 41(1): 30-35, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-26353120

RESUMEN

OBJECTIVE: Malignant pleural mesothelioma (MPM) is a deadly disease with varying treatment options. This study retrospectively describes treatment practices at the University of Washington Medical System from 1980 to 2011, and evaluates the impact of trimodality therapy and radiation (photon and neutron) on survival. METHODS: A retrospective study was conducted on patients treated for MPM. Univariate and multivariate methods were utilized to evaluate potential factors associated with survival. Treatments received and baseline characteristics were included. Survival analysis of trimodality therapy was performed using a propensity score method to control for baseline characteristics. RESULTS: Among 78 eligible patients, the median age at diagnosis was 59 years and the median survival was 13.7 months. On multivariate analysis, the significant predictors of improved survival were age, smoking history, location, and receipt of radiation therapy or chemotherapy. In the 48 patients receiving radiation therapy, the difference in survival between neutron therapy and non-neutron therapy patients was not statistically significant: hazard ratio, 1.20 (95% confidence interval, 0.68-2.13), P=0.52. Patients receiving trimodality therapy were more likely to have early-stage disease (60% vs. 30%) and epithelioid histology (86% vs. 58%). In a propensity score-weighted Cox proportional hazards model, trimodality therapy patients had improved overall survival, hazard ratio 0.45, P=0.004, median 14.6 versus 8.6 months. CONCLUSIONS: Trimodality therapy was significantly associated with prolonged survival in patients with MPM, even when adjusting for baseline patient factors. Radiation therapy was associated with improved survival, but the modality of radiation therapy used was not associated with outcome.


Asunto(s)
Neoplasias Pulmonares/mortalidad , Neoplasias Pulmonares/terapia , Mesotelioma/mortalidad , Mesotelioma/terapia , Pleura/cirugía , Neoplasias Pleurales/mortalidad , Neoplasias Pleurales/terapia , Adulto , Factores de Edad , Anciano , Análisis de Varianza , Quimioterapia Adyuvante , Estudios de Cohortes , Terapia Combinada/métodos , Bases de Datos Factuales , Supervivencia sin Enfermedad , Femenino , Humanos , Neoplasias Pulmonares/patología , Masculino , Mesotelioma/patología , Mesotelioma Maligno , Persona de Mediana Edad , Análisis Multivariante , Invasividad Neoplásica/patología , Estadificación de Neoplasias , Neoplasias Pleurales/patología , Pronóstico , Puntaje de Propensión , Modelos de Riesgos Proporcionales , Radioterapia Adyuvante , Estudios Retrospectivos , Medición de Riesgo , Factores Sexuales , Análisis de Supervivencia
3.
Int J Radiat Oncol Biol Phys ; 94(4): 850-7, 2016 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-26972658

RESUMEN

PURPOSE: To survey image guided radiation therapy (IGRT) practice patterns, as well as IGRT's impact on clinical workflow and planning treatment volumes (PTVs). METHODS AND MATERIALS: A sample of 5979 treatment site-specific surveys was e-mailed to the membership of the American Society for Radiation Oncology (ASTRO), with questions pertaining to IGRT modality/frequency, PTV expansions, method of image verification, and perceived utility/value of IGRT. On-line image verification was defined as images obtained and reviewed by the physician before treatment. Off-line image verification was defined as images obtained before treatment and then reviewed by the physician before the next treatment. RESULTS: Of 601 evaluable responses, 95% reported IGRT capabilities other than portal imaging. The majority (92%) used volumetric imaging (cone-beam CT [CBCT] or megavoltage CT), with volumetric imaging being the most commonly used modality for all sites except breast. The majority of respondents obtained daily CBCTs for head and neck intensity modulated radiation therapy (IMRT), lung 3-dimensional conformal radiation therapy or IMRT, anus or pelvis IMRT, prostate IMRT, and prostatic fossa IMRT. For all sites, on-line image verification was most frequently performed during the first few fractions only. No association was seen between IGRT frequency or CBCT utilization and clinical treatment volume to PTV expansions. Of the 208 academic radiation oncologists who reported working with residents, only 41% reported trainee involvement in IGRT verification processes. CONCLUSION: Consensus guidelines, further evidence-based approaches for PTV margin selection, and greater resident involvement are needed for standardized use of IGRT practices.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Neoplasias/radioterapia , Pautas de la Práctica en Medicina , Oncología por Radiación/estadística & datos numéricos , Radioterapia Guiada por Imagen/estadística & datos numéricos , Flujo de Trabajo , Neoplasias del Ano/radioterapia , Neoplasias de la Mama/radioterapia , Instituciones Oncológicas/estadística & datos numéricos , Tomografía Computarizada de Haz Cónico/estadística & datos numéricos , Neoplasias Esofágicas/radioterapia , Femenino , Neoplasias de Cabeza y Cuello/radioterapia , Humanos , Masculino , Neoplasias Pélvicas/radioterapia , Neoplasias de la Próstata/radioterapia , Oncología por Radiación/métodos , Radioterapia Conformacional/estadística & datos numéricos , Radioterapia Guiada por Imagen/métodos , Radioterapia de Intensidad Modulada/estadística & datos numéricos , Sociedades Médicas , Encuestas y Cuestionarios , Estados Unidos
4.
Int J Radiat Oncol Biol Phys ; 93(4): 746-53, 2015 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-26530741

RESUMEN

PURPOSE: To evaluate stressors among radiation oncology residency program directors (PDs) and determine the prevalence and indicators of burnout. METHODS AND MATERIALS: An anonymous, online, cross-sectional survey was offered to PDs of US radiation oncology programs in the fall of 2014. Survey content examined individual and program demographics, perceptions surrounding the role of PD, and commonly encountered stressors. Burnout was assessed using the validated Maslach Burnout Inventory-Human Services Survey. RESULTS: In total, 47 of 88 PDs (53%) responded to the survey. Although 78% of respondents reported feeling "satisfied" or "highly satisfied" with their current role, 85% planned to remain as PD for <5 years. The most commonly cited stressors were satisfying Accreditation Council for Graduate Medical Education/Residency Review Committee requirements (47%), administrative duties (30%) and resident morale (28%). Three-quarters of respondents were satisfied that they became PDs. Overall, 11% of respondents met criteria for low burnout, 83% for moderate burnout, and 6% for high burnout. Not having served as a PD at a prior institution correlated with high depersonalization (OR 6.75, P=.04) and overall burnout (odds ratio [OR], 15.6; P=.04). Having more years on faculty prior to becoming PD correlated with less emotional exhaustion (OR, 0.44, P=.05) and depersonalization (OR, 0.20, P=.04). Finally, having dedicated time for PD duties correlated with less emotional exhaustion (OR, 0.27, P=.04). CONCLUSIONS: Moderate levels of burnout are common in U.S. radiation oncology PDs with regulatory stressors being common. Despite this, many PDs are fulfilled with their role. Longitudinal studies assessing dynamic external factors and their influence on PD burnout would be beneficial.


Asunto(s)
Personal Administrativo/psicología , Agotamiento Profesional/epidemiología , Internado y Residencia , Satisfacción en el Trabajo , Enfermedades Profesionales/epidemiología , Oncología por Radiación/estadística & datos numéricos , Personal Administrativo/estadística & datos numéricos , Adulto , Análisis de Varianza , Agotamiento Profesional/etiología , Selección de Profesión , Estudios Transversales , Humanos , Internado y Residencia/estadística & datos numéricos , Persona de Mediana Edad , Enfermedades Profesionales/psicología , Satisfacción Personal , Reorganización del Personal/estadística & datos numéricos , Estrés Psicológico/epidemiología , Estrés Psicológico/etiología , Factores de Tiempo , Estados Unidos/epidemiología
5.
Pract Radiat Oncol ; 5(5): e409-e416, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26231595

RESUMEN

PURPOSE: There is a growing interest in the application of incident learning systems (ILS) to radiation oncology. The purpose of the present study is to define statistical metrics that may serve as benchmarks for successful operation of an incident learning system. METHODS AND MATERIALS: A departmental safety and quality ILS was developed to monitor errors, near-miss events, and process improvement suggestions. Event reports were reviewed by a multiprofessional quality improvement committee. Events were scored by a near-miss risk index (NMRI) and categorized by event point of origination and discovery. Reporting trends were analyzed over a 2-year period, including total number and rates of events reported, users reporting, NMRI, and event origination and discovery. RESULTS: A total of 1897 reports were evaluated (1.0 reports/patient, 0.9 reports/unique treatment course). Participation in the ILS increased as demonstrated by total events (2.1 additional reports/month) and unique users (0.5 new users/month). Sixteen percent of reports had an NMRI of 0 (none), 42% had an NMRI of 1 (mild), 25% had an NMRI of 2 (moderate), 12% had an NMRI of 3 (severe), and 5% had an NMRI of 4 (critical). Event NMRI showed a significant decrease in the first 6 months (1.68-1.42, P < .001). Trends in origination and discovery of reports were broadly distributed between radiation therapy process steps and staff groups. The highest risk events originated in imaging for treatment planning (NMRI = 2.0 ± 1.1; P < .0001) and were detected in on-treatment quality management (NMRI = 1.7 ± 1.1; P = .003). CONCLUSIONS: Over the initial 2-year period of ILS operation, rates of reporting increased, staff participation increased, and NMRI of reported events declined. These data mirror previously reported findings of improvement in safety culture endpoints. These metrics may be useful for other institutions seeking to create or evaluate their own ILS.


Asunto(s)
Seguridad del Paciente/normas , Aprendizaje Basado en Problemas/métodos , Oncología por Radiación/normas , Gestión de Riesgos/métodos , Gestión de Riesgos/normas , Consenso , Humanos , Mejoramiento de la Calidad
6.
Int J Radiat Oncol Biol Phys ; 92(3): 525-31, 2015 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-25936811

RESUMEN

PURPOSE: The aim of this study was to examine the experiences of radiation oncology applicants and to evaluate the prevalence of behaviors that may be in conflict with established ethical standards. METHODS AND MATERIALS: An anonymous survey was sent to all 2013 applicants to a single domestic radiation oncology residency program through the National Resident Matching Program (NRMP). Questions included demographics, survey of observed behaviors, and opinions regarding the interview and matching process. Descriptive statistics were presented. Characteristics and experiences of respondents who matched were compared with those who did not match. RESULTS: Questionnaires were returned by 87 of 171 applicants for a 51% response rate. Eighty-two questionnaires were complete and included for analysis. Seventy-eight respondents (95.1%) reported being asked at least 1 question in conflict with the NRMP code of conduct. When asked where else they were interviewing, 64% stated that this query made them uncomfortable. Forty-five respondents (54.9%) reported unsolicited post-interview contact by programs, and 31 (37.8%) felt pressured to give assurances. Fifteen respondents (18.3%) reported being told their rank position or that they were "ranked to match" prior to Match day, with 27% of those individuals indicating this information influenced how they ranked programs. Half of respondents felt applicants often made dishonest or misleading assurances, one-third reported that they believed their desired match outcome could be improved by deliberately misleading programs, and more than two-thirds felt their rank position could be improved by having faculty from their home institutions directly contact programs on their behalf. CONCLUSIONS: Radiation oncology applicants report a high prevalence of behaviors in conflict with written NRMP policies. Post-interview communication should be discouraged in order to enhance fairness and support the professional development of future radiation oncologists.


Asunto(s)
Decepción , Internado y Residencia/ética , Entrevistas como Asunto , Selección de Personal/ética , Oncología por Radiación/ética , Adulto , Correspondencia como Asunto , Recolección de Datos , Femenino , Adhesión a Directriz/ética , Adhesión a Directriz/normas , Humanos , Internado y Residencia/normas , Entrevistas como Asunto/normas , Masculino , Selección de Personal/normas , Oncología por Radiación/normas , Criterios de Admisión Escolar , Estadísticas no Paramétricas , Encuestas y Cuestionarios
7.
Am J Clin Oncol ; 38(1): 47-50, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25616202

RESUMEN

INTRODUCTION: Malignant pleural mesothelioma (MPM) is a fatal disease lacking standardized treatment. We describe the use of fast neutron radiation therapy in MPM patients referred to the Department of Radiation Oncology at the University of Washington Medical Center. MATERIALS AND METHODS: Retrospective chart review of MPM patients receiving neutron radiotherapy treatment from 1980 to 2012. RESULTS: A total of 30 MPM patients received fast neutron radiotherapy as part of their treatment regimen. Median age at diagnosis was 59.6 years (range, 46.6 to 72.3 y). Eighteen patients received fast neutron radiotherapy as a component of trimodality treatment. Median overall survival was 20.3 months (range, 5.5 to 73.3 mo) with 1 patient censored at 34.8 months and all other patients with confirmed dates of death. One patient receiving radiotherapy alone as a palliative measure died during radiation treatment. One patient was unable to tolerate radiotherapy and stopped before completing prescribed treatment. On univariate analysis, Brigham Stage at presentation was a significant predictor of survival (P<0.01). No significant differences in survival were observed when comparing patients who received trimodality treatment compared to those who did not. CONCLUSIONS: Fast neutron radiotherapy may be utilized in the management of MPM patients. However, treatment with fast neutron radiotherapy did not significantly improvement outcome, even when used in a trimodality regimen.


Asunto(s)
Neutrones Rápidos/uso terapéutico , Neoplasias Pulmonares/radioterapia , Mesotelioma/radioterapia , Neoplasias Pleurales/radioterapia , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Carboplatino/administración & dosificación , Quimioradioterapia Adyuvante/métodos , Cisplatino/administración & dosificación , Estudios de Cohortes , Femenino , Humanos , Neoplasias Pulmonares/terapia , Masculino , Mesotelioma/terapia , Mesotelioma Maligno , Metotrexato/administración & dosificación , Persona de Mediana Edad , Neoplasias Pleurales/terapia , Neumonectomía , Radioterapia Adyuvante/métodos , Estudios Retrospectivos , Resultado del Tratamiento , Vinblastina/administración & dosificación
8.
Pract Radiat Oncol ; 5(3): e229-e237, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25413404

RESUMEN

PURPOSE: Rigorous use of departmental incident learning is integral to improving patient safety and quality of care. The goal of this study was to quantify the impact of a high-volume, departmental incident learning system on patient safety culture. METHODS AND MATERIALS: A prospective, voluntary, electronic incident learning system was implemented in February 2012 with the intent of tracking near-miss/no-harm incidents. All incident reports were reviewed weekly by a multiprofessional team with regular department-wide feedback. Patient safety culture was measured at baseline with validated patient safety culture survey questions. A repeat survey was conducted after 1 and 2 years of departmental incident learning. Proportional changes were compared by χ(2) or Fisher exact test, where appropriate. RESULTS: Between 2012 and 2014, a total of 1897 error/near-miss incidents were reported, representing an average of 1 near-miss report per patient treated. Reports were filed by a cross section of staff, with the majority of incidents reported by therapists, dosimetrists, and physicists. Survey response rates at baseline and 1 and 2 years were 78%, 80%, and 80%, respectively. Statistically significant and sustained improvements were noted in several safety metrics, including belief that the department was openly discussing ways to improve safety, the sense that reports were being used for safety improvement, and the sense that changes were being evaluated for effectiveness. None of the surveyed dimensions of patient safety culture worsened. Fewer punitive concerns were noted, with statistically significant decreases in the worry of embarrassment in front of colleagues and fear of getting colleagues in trouble. CONCLUSIONS: A comprehensive incident learning system can identify many areas for improvement and is associated with significant and sustained improvements in patient safety culture. These data provide valuable guidance as incident learning systems become more widely used in radiation oncology.


Asunto(s)
Seguridad del Paciente , Gestión de Riesgos/organización & administración , Administración de la Seguridad , Retroalimentación , Humanos , Seguridad del Paciente/estadística & datos numéricos , Estudios Prospectivos , Calidad de la Atención de Salud , Oncología por Radiación/organización & administración , Gestión de Riesgos/métodos , Gestión de Riesgos/estadística & datos numéricos , Administración de la Seguridad/métodos , Administración de la Seguridad/organización & administración , Administración de la Seguridad/estadística & datos numéricos , Encuestas y Cuestionarios
9.
Am J Cardiol ; 113(6): 1036-40, 2014 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-24472597

RESUMEN

Prenatal diagnosis has been shown to improve preoperative morbidity in newborns with congenital heart defects (CHDs), but there are conflicting data as to the association with mortality. We performed a population-based, retrospective, cohort study of infants with prenatally versus postnatally diagnosed CHDs from 1994 to 2005 as ascertained by the Metropolitan Atlanta Congenital Defects Program. Among infants with isolated CHDs, we estimated 1-year Kaplan-Meier survival probabilities for prenatal versus postnatal diagnosis and estimated Cox proportional hazard ratios adjusted for critical CHD status, gestational age, and maternal race/ethnicity. Of 539,519 live births, 4,348 infants had CHDs (411 prenatally diagnosed). Compared with those with noncritical defects, those with critical defects were more likely to be prenatally diagnosed (58% vs 20%, respectively, p <0.001). Of the 3,146 infants with isolated CHDs, 1-year survival rate was 77% for those prenatally diagnosed (n = 207) versus 96% for those postnatally diagnosed (n = 2,939, p <0.001). Comparing 1-year survival rate among those with noncritical CHDs alone (n = 2,455) showed no difference between prenatal and postnatal diagnoses (96% vs 98%, respectively, p = 0.26), whereas among those with critical CHDs (n = 691), prenatally diagnosed infants had significantly lower survival rate (71% vs 86%, respectively, p <0.001). Among infants with critical CHDs, the adjusted hazard ratio for 1-year mortality rate for those prenatally versus postnatally (reference) diagnosed was 2.51 (95% confidence interval 1.72 to 3.66). In conclusion, prenatal diagnosis is associated with lower 1-year survival rate for infants with isolated critical CHDs but shows no change for those with isolated noncritical CHDs. More severe disease among the critical CHD subtypes diagnosed prenatally might explain these findings.


Asunto(s)
Cardiopatías Congénitas/diagnóstico , Vigilancia de la Población , Diagnóstico Prenatal/métodos , Adulto , Preescolar , Femenino , Estudios de Seguimiento , Georgia/epidemiología , Edad Gestacional , Cardiopatías Congénitas/embriología , Cardiopatías Congénitas/mortalidad , Humanos , Lactante , Mortalidad Infantil/tendencias , Recién Nacido , Masculino , Embarazo , Estudios Retrospectivos , Tasa de Supervivencia/tendencias , Adulto Joven
10.
Int J Radiat Oncol Biol Phys ; 88(2): 363-8, 2014 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-24189126

RESUMEN

PURPOSE: The aims of this study were to determine the self-reported prevalence of burnout in chairs of academic radiation oncology departments, to identify factors contributing to burnout, and to compare the prevalence of burnout with that seen in other academic chair groups. METHODS AND MATERIALS: An anonymous online survey was administered to the membership of the Society of Chairs of Academic Radiation Oncology Programs (SCAROP). Burnout was measured with the Maslach Burnout Inventory-Human Services Survey (MBI-HSS). RESULTS: Questionnaires were returned from 66 of 87 chairs (76% response rate). Seventy-nine percent of respondents reported satisfaction with their current positions. Common major stressors were budget deficits and human resource issues. One-quarter of chairs reported that it was at least moderately likely that they would step down in the next 1 to 2 years; these individuals demonstrated significantly higher emotional exhaustion. Twenty-five percent of respondents met the MBI-HSS criteria for low burnout, 75% for moderate burnout, and none for high burnout. Group MBI-HSS subscale scores demonstrated a pattern of moderate emotional exhaustion, low depersonalization, and moderate personal accomplishment, comparing favorably with other specialties. CONCLUSIONS: This is the first study of burnout in radiation oncology chairs with a high response rate and using a validated psychometric tool. Radiation oncology chairs share similar major stressors to other chair groups, but they demonstrate relatively high job satisfaction and lower burnout. Emotional exhaustion may contribute to the anticipated turnover in coming years. Further efforts addressing individual and institutional factors associated with burnout may improve the relationship with work of chairs and other department members.


Asunto(s)
Personal Administrativo/psicología , Agotamiento Profesional/epidemiología , Satisfacción en el Trabajo , Oncología por Radiación/estadística & datos numéricos , Personal Administrativo/estadística & datos numéricos , Adulto , Anciano , Presupuestos , Agotamiento Profesional/etiología , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reorganización del Personal , Prevalencia , Autoinforme , Desarrollo de Personal , Estados Unidos/epidemiología
11.
J Oncol Pract ; 8(5): 275-81, 2012 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23277763

RESUMEN

PURPOSE: Physicians caring for patients with cancer frequently encounter individuals who will die as a result of their disease. The primary aim of this study was to examine the frequency and nature of bereavement practices among cancer care and palliative care physicians in the Pacific Northwest United States. Secondary aims included identification of factors and barriers associated with bereavement follow-up. METHODS: An institutional review board (IRB) -approved, anonymous online survey of cancer specialists and palliative care physicians in Alaska, Washington, Oregon, Idaho, Montana, and Wyoming was performed in fall 2010. Potential participants were identified through membership in national professional organizations. Summary statistics and logistic regression methods were used to examine frequency and predictors of bereavement practices. RESULTS: A total of 194 (22.7%) of 856 physicians participated in the online survey, with 164 (19.1%) meeting study inclusion criteria. Overall, 70% of respondents reported always or usually making a telephone call to families, sending a condolence letter, or attending a funeral service after a patient's death. The most common perceived barriers to bereavement follow-up were lack of time and uncertainty of which family member to contact. Sixty-nine percent of respondents did not feel that they had received adequate training on bereavement follow-up during postgraduate training. CONCLUSION: Although a significant portion of respondents engaged in some form of bereavement follow-up, the majority felt inadequately trained in these activities. Efforts to identify available resources and address bereavement activities in postgraduate training may contribute to improved multidisciplinary treatment of patients with cancer and their families.


Asunto(s)
Aflicción , Oncología Médica , Neoplasias/psicología , Cuidados Paliativos/psicología , Rol del Médico/psicología , Médicos/psicología , Adulto , Anciano , Recolección de Datos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Noroeste de Estados Unidos , Cuidados Paliativos/ética , Estados Unidos
12.
Int J Cancer ; 118(8): 2031-4, 2006 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-16284954

RESUMEN

Studies of the association between breast size, as a proxy for mammary gland mass, and breast cancer risk have given equivocal results. Most have been case-control studies with limited statistical power. We conducted a prospective analysis of the relation between breast size as measured by self-reported bra cup size and breast cancer risk among premenopausal women enrolled in the Nurses' Health Study II. Bra cup size at age 20 was assessed among 89,268 premenopausal women aged 29-47 in 1993. Subsequent incident cases of invasive breast cancer were assessed until 2001. Hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated with a Cox proportional hazards model adjusting for potential confounders and risk factors for breast cancer. During 622,732 person-years of follow-up, 803 premenopausal women were newly diagnosed with invasive breast cancer. For women with a BMI below 25 kg/m2, those with a bra cup size of "D or larger" had a significantly higher incidence of breast cancer than women who reported "A or smaller" (covariate adjusted HR=1.80; 95% CI 1.13-2.88; ptrend=0.01). There was no significant association among women with a BMI of 25 kg/m2 or higher. Stratifying by BMI at age 18 at a cutoff point of 21 kg/m2 gave similar results. Larger bra cup size at a young age is associated with a higher incidence of premenopausal breast cancer, though this association is limited to leaner women.


Asunto(s)
Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/etiología , Mama/anatomía & histología , Adulto , Factores de Edad , Edad de Inicio , Índice de Masa Corporal , Femenino , Humanos , Incidencia , Persona de Mediana Edad , Premenopausia , Estudios Prospectivos
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