Using a liberal criterion, a conservative probability-based criterion, and a criterion for autosomal dominant inheritance, we classified 36%, 13.5%, and 6.4% of 311 patients, respectively, as having familial Alzheimer's disease (FAD). The mean age of onset was over 70 years for all three categories of FAD. FAD and sporadic Alzheimer's disease (SAD) cases did not differ in clinical features, incidence of risk factors for dementia, or MRI or PET features. We observed earlier age of onset of AD to be related positively to longer duration of disease. Except for the autosomal dominant AD group, there was an earlier age of onset in FAD probands. The inheritance of AD from mothers was from 1.7 to 3.6 times more frequent than from fathers. Among SAD patients only, we found a preponderance of women, who were more frequently affected than would be expected from the male/female ratio in the general population of the same average age. Language performance tended to be less affected in FAD than in SAD patients, contrary to some previous reports.

BACKGROUND. National surveys indicate that only 15% to 30% of all women in the general population 50 years of age or older have an annual mammogram. METHODS. We studied first-degree female relatives of women with breast cancer, who are at elevated risk of disease, to describe the breast cancer screening practices of these relatives and to improve their practices through a program of intensive education. We report here the screening behaviors of 2471 relatives of women with breast cancer. RESULTS. Self-reported behaviors were as follows: 49% performed monthly breast self-examination and 70% had annual breast examinations by a medical professional. Of 983 women 50 years of age or older, 49% had had a mammogram, but only 14% have a mammogram annually. Of women 50 years of age or older who had never had a mammogram, 92% reported never having had one recommended by a medical professional. CONCLUSIONS. Our findings indicate that screening behaviors in relatives of breast cancer patients are not substantially different from those of women in the general population. Enhanced efforts both to educate medical professionals and to encourage women to demand screening mammography are necessary to reduce breast cancer mortality.

The Pennsylvania Cancer Registry was used to contact breast cancer patients and, through them, their adult sisters and daughters. The sisters and daughters were counseled concerning their higher than average risks for breast cancer and their need for mammography and breast self-examination. Results showed a 9 percent increase in mammography and a 10 percent increase in breast self-examination rates for the counseled over control group. Costs were $49 per counseled sister or daughter indicating a need to increase cost effectiveness before implementation is practical.

The results of the Third National Cancer Survey have shown substantial variations in lung cancer incidence rates for white males within Allegheny County, Pennsylvania. To explain these differences, two areas showing over a twofold difference in the 1970 age-adjusted incidence rates (127.7 compared to 59.0 per 100,00) were studied in greater detail. Estimates of smoking experience by age were determined in the two areas by survey sampling methods of white males 35 years of age and older. The results show the high risk area had a significantly greater proportion of males currently smoking and who had ever smoked cigarettes compared to the low risk area. Males in the high risk area also began smoking over four years earlier, and proportionally fewer men smoked filter cigarettes. Calculations of Lung cancer risk based on these results and a model of risk from the prospective and retrospective studies showed that almost all of the observed difference in risk between areas was attributable to cigarettes.

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