Vital and health statistics: Series 10, Data from National Health Survey. 12. Bed disability among chronically limited, United States, July 1957-June 1961, statistics on average annual number of days of bed disability for all persons, persons with limitation of activity, and persons with limitation of mobility, due to chronic conditions, by degree of limitation, geographic region, family income, living arrangements, sex, and age, based on data collected in household interviews during period July 1957-June 1961; [prepared by Charles S. Wilder].

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