Stage at Diagnosis and Treatment Patterns Among Older Women With Breast Cancer

作者：Gerald F. Riley · 发表于：JAMA · 年份：1999 · DOI：10.1001/jama.281.8.720 · 被引用次数：180 · 研究领域：Global Cancer Incidence and Screening、Economic and Financial Impacts of Cancer、Breast Cancer Treatment Studies

CONTEXT: Few studies have compared patterns of care in health maintenance organization (HMO) and fee-for-service (FFS) settings. OBJECTIVE: To examine breast cancer stage at diagnosis and, for those at an early stage, treatment patterns for elderly women in HMO and FFS settings. DESIGN: Cancer registry data from the Surveillance, Epidemiology, and End Results (SEER) program linked to Medicare enrollment records. SETTINGS AND PARTICIPANTS: Women aged 65 years or older residing in 11 geographic areas who were newly diagnosed as having breast cancer between 1988 and 1993. MAIN OUTCOME MEASURES: Standardized percentage of cases diagnosed at late stages for HMO vs FFS; standardized percentage of early-stage cases undergoing initial treatment with breast-conserving surgery (BCS); and, among BCS cases, standardized percentage receiving adjuvant radiation therapy. Standardization was achieved through logistic regression, controlling for patient demographics, cancer history, county of residence, year of diagnosis, and educational attainment at the census tract level. Analyses of treatment patterns were controlled for stage at diagnosis and tumor size. RESULTS: The HMO enrollees were less likely to have breast cancer diagnosed at late stages than FFS patients (HMO, 7.6%; FFS, 10.8%; difference, -3.2% [95% confidence interval (CI), -4.2% to -2.2 %]). Among early-stage cases, the percentages undergoing BCS were similar in HMO and FFS settings overall (HMO, 38.4%; FFS, 36.8%; difference, ...