RT Journal A1 Stevens J, Keil JE, Tyroler HA T1 HOw was 'race' determined?-reply JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1993 FD January 25 VO 153 IS 2 SP 260 OP 263 DO 10.1001/archinte.1993.00410020104013 UL http://dx.doi.org/10.1001/archinte.1993.00410020104013 AB We commend Weissman for calling attention to the desirability of clarifying the meaning of racial categories used in health studies. Weissman's comments follow by almost 20 years similar concerns expressed by Milton Terris.1 For our study of body mass index and body girth associations with mortality,2 the racial classification used was from the 1960 examination of the Charleston Heart Study cohort and was based on interviewer's evaluation. No attempt was made to distinguish the "mixed racial heritage" Weissman refers to. Skin color was measured by photoelectric reflectance and, although not used for classification, there was little overlap in the distribution of values in the two groups.The Charleston Heart Study investigators have long recognized the combined influence of genetic and social and physical environmental effects on health indexed by classification of race.3,4 Nowhere in our study of obesity and fat patterning in black and white women did