Twenty-three studies evaluated the accuracy of reporting family history (Appendix Tables 7 and 8). Informants in these studies had cancer (57 - 72), diabetes (73 - 76), hypertension (74 - 77), or cardiovascular disease (75 - 76,78 - 79) and were recruited from clinics, disease registries, or population cohort studies (75 - 76). In the case–control studies, unaffected participants (57,61 - 64,66,70,78) were recruited from the community or identified through administrative databases. Family history was collected in face-to-face interviews (57,61,63,65,69,72,74,76,78), mailed surveys (58,60,62,64,68,71,75), or telephone interviews (59,67,70,73). One study (69) did not report the mode of collection. Most reports did not provide detailed information on the type or extent of family history questioning, except for the type of relative of interest. Relatives' actual disease status was verified by using medical records, disease or death registries, or personal contact. Many studies used more than 1 verification method.