Breast cancer screening in rural populations: a pilot study.

This report describes the development and implementation of a pilot intervention project designed to determine the economic, logistic, behavioral, and attitudinal variables that influence rural women's participation in a community-based breast cancer screening program. This paper reports on survey responses of women who registered for this pilot breast cancer screening program. It includes information on all women who registered for the project--both those who received breast cancer screening and those who did not. The study is a pilot intervention project, the overall goal of which was to develop a network of community providers, organizations, and volunteers to facilitate breast cancer screening among rural women. Of the 159 women registered for this pilot program, 101 (63.5%) were screened (receiving both a clinical breast examination and mammogram). The attitudes of women surveyed through the project confirm the importance of a physician recommendation for breast cancer screening. More than 90 percent of both the screened and unscreened groups of women stated that a doctor's recommendation to have breast cancer screening is important. Further, nearly 42 percent of the unscreened group had never had a physician recommend breast cancer screening. Despite existing barriers to screening, this pilot study demonstrated that health care professionals and regional organizations that have not traditionally been associated with delivering health care in this particular community setting can successfully work together to implement breast cancer screening programs.

Breast cancer among black and white women in the 1980s. Changing patterns in the United States by race, age, and extent of disease.

BACKGROUND: This national study of breast cancer incidence and mortality was conducted to determine whether patterns of change differ for black and white women, to evaluate patterns by extent of disease, and to determine whether recent patterns of breast cancer are consistent with results that one would expect due to increases in use of screening examinations by women. METHODS: The study included 104,351 cases of in situ or invasive breast cancer diagnosed between 1983 and 1989 among women from the nine geographic areas participating in the National Cancer Institute Surveillance, Epidemiology, and End Results program. Breast cancer incidence patterns were examined by extent of disease for black and white women and by age at diagnosis. RESULTS: Significant increases occurred in the incidence of all early-stage breast cancers. Concomitantly, significant decreases occurred in the incidence of the most advanced-stage breast cancers. Although both white and black women experienced significant increases in early-stage breast cancer, black women have substantially lower rates of the least extensive breast cancers. CONCLUSIONS: These results strongly suggest that a major explanation for the increase in breast cancer incidence in the 1980s may well be the increased prevalence of breast cancer screening among women in the United States. They also suggest a consistent benefit of screening across all age groups from 40 to 49 years through 70 years and older.

Difficulties in physical functioning reported by middle-aged and elderly women with breast cancer: a case-control comparison.

Levels of physical functioning reported by women aged 55 to 84 with incident breast cancer were compared to those reported by women of the same age without the disease. A total of 422 breast cancer patients, identified through the Metropolitan Detroit Cancer Surveillance System, were interviewed 3 and 12 months after diagnosis. Interviews with 478 controls of the same age, identified through telephone random-digit dialing, were conducted twice during the same time period. At 3 months, patients aged 55-64 and 65-74 reported greater difficulty than controls in completing tasks requiring upper-body strength. Little difference was shown between cases and controls aged 75 to 84. After one year, patients aged 65-74 still reported higher than expected levels of difficulty in light lifting as well as pushing and lifting heavy objects. Among cases aged 55-64, only pushing and lifting heavy objects remained problematic. Estimates of the prevalence of physical difficulty will be useful in planning future breast cancer treatment and rehabilitation services.

Racial and age differences in multiple primary cancers after breast cancer: a population-based analysis.

The occurrence of multiple primary cancers was evaluated among 17,944 white and black female residents of Metropolitan Detroit diagnosed with breast cancer between 1973 and 1983. Invasive second primary cancers were diagnosed among 1106 of these women, almost twice the expected number. Subsequent in situ cancers were detected four times more often than expected. Fifty-six percent of the subsequent invasive cancers were of the breast (Standardized Incidence Ratio, SIR = 3.80). Black women experienced higher risk of subsequent breast cancers (SIR = 5.30) than white women (SIR = 3.62). Highest risk was seen among women first diagnosed before age 40 (SIR for black women = 26.15, SIR for white women = 10.87) and within five years of initial diagnosis. These findings suggest that young breast cancer patients, especially black women, are at high risk of developing a second primary breast cancer soon after their initial diagnosis and should be under continued medical surveillance. The occurrence of multiple primary breast cancers among young women suggests a genetic component to risk. Identification of this subpopulation would be useful in the study of molecular and genetic markers for cancer. Subsequent colon (SIR = 1.24) and cervical (SIR = 1.54) cancers also were diagnosed significantly more often than expected, as were ovarian cancers among white women (SIR = 1.45). These findings are consistent with common etiologic factors associated with these cancers.

Neoplasms in dialysis patients: a population-based study.

Cancer incidence was assessed in 4,161 end-stage renal disease (ESRD) patients on dialysis to determine whether there was any excess risk of cancer in this population. Records from the Michigan Kidney Registry (MKR) for 1973 to 1984 were linked to those of the Michigan Cancer Foundation's Metropolitan Detroit Cancer Surveillance System (MDCSS) to identify cases in the dialysis cohort. The expected number of cancers in the ESRD population was calculated using the race-, sex-, age- and calendar year-specific incidence rates of the tricounty metropolitan Detroit region of 4 million residents. The standardized incidence ratio (observed:expected) was significantly increased for all in situ tumors combined, as well as for invasive tumors of the kidney, the corpus uteri, and the prostate. The four-fold to five-fold excess (P less than 0.005) observed for renal and endometrial cancers, in addition to the significantly elevated (P less than 0.05) risk of prostate cancer indicates that patients maintained on dialysis should be evaluated for these tumors when they experience even minor symptoms. Population-based cancer and renal disease registries provide excellent opportunities for investigating etiologic hypotheses and future studies should incorporate potential risk factors when analyzing these data.