Headache as the reason for office visits, National Ambulatory Medical Care Survey: United States, 1977-78

Headache was the principal cause of an estimated 18,341,923 visits to office-based physicians during 1977-78. Headache was the seventh most frequent ; symptomatic reason for visits given by patients. ; The estimates in this report are based on data collected in the National Ambulatory Medical Care Survey (NAMCS), a probability sample survey conducted yearly by the Division of Health Care Statistics of the National Center for Health Statistics. Since the estimates presented in this report are based on a sample rather than on the entire universe of office-baseded physicians, the data are subject to sampling ability. The Technical Notes at the end of this report provide a brief explanation of sampling errors and guidelines for judging the precision of the estimates presented. A more detailed description of the sample design and additional definitions of certain terms used in NAMCS have been published elsewhere. ; PMID: 10254004 ; ad067acc.pdf ; 1981 ; 10382