Older residents (N 5 1972) in California were investigated prospectively for association of volunteering service to others and all-cause mortality. Potential confounding factors were studied: demographics, health status, physical functioning, health habits, social support, religious involvement, and emotional states. Possible interaction effects of volunteering with religious involvement and social support were also explored. Results showed that 31 percent (n 5 630) of respondents volunteered, about half (n5289) for more than one organization. High volunteers ([.greaterequal]2 organizations) had 63 percent lower mortality than nonvolunteers (age and sex-adjusted) with relative hazard (RH) 5 0.37, confidence interval (CI) 5 0.24, 0.58. Multivariate adjustment moderately reduced difference to 44 percent (RH 5 0.56, CI 5 0.35, 0.89), mostly due to physical functioning, health habits, and social support. Unexpectedly, volunteering was slightly more protective for those with high religious involvement and perceived social support. After multivariate adjustment, any level of volunteering reduced mortality by 60 percent among weekly attenders at religious services (RH 5 0.40; CI 5 0.21,0.74). Lower mortality rates for community service volunteers were only partly explained by health habits, physical functioning, religious attendance, and social support.

The general pattern of findings in this study indicates that while death has been postponed in this socioeconomically advantaged population, the prevalence of disease and disability has not. If true, this implies that residents of an affluent community can spend a longer rather than shorter period of their late life in a state of infirmity and in need of medical care. This appears to be especially true for women.

Uncontrolled hypertension occurs commonly among elderly patients notwithstanding a relatively high standard of living. The choice of medication, presence of concomitant disease, and availability of insurance may be important factors influencing blood pressure control.

Utilizing volunteers in research-assistant roles can provide a new model for extending research dollars in epidemiologic studies of the elderly. This is increasingly important with a rapidly growing older population suffering from an increasing prevalence of disability, disease, and the related medical costs. During a two-year cross-sectional study of factors that predict health aging conducted by the Buck Center for Research in Aging in Marin County, California, 82 volunteers were recruited and trained to fill roles often held by paid research assistants. The key activities of telephone screening, interviewing, coding, and data entry were successfully completed by trained volunteers following standards and within a time frame comparable to similar studies. Volunteer research assistants contributed approximately 13,600 hours that resulted in a savings in personnel costs of over $100,000. Many of the people recruited and trained as volunteer research assistants were healthy older adults and retired workers. The project utilized their transferable skills and talents in an interesting and productive capacity.

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