Table 1 describes subjects with complete data on family history of alcoholism and BMI, after exclusions for current (or recent) pregnancy and underweight status (see Methods). Altogether, for the NLAES, 880 subjects were excluded due to pregnancy, 785 because of missing BMI, 630 because of missing family history, and 1,255 because of being underweight. In the NESARC, 453 were excluded due to pregnancy, 1,423 due to missing BMI, 762 because of missing family history, and 830 due to underweight status. This resulted in sample sizes of N=39,312 for the 1991–92 NLAES survey and N=39,625 for the NESARC, conducted ten years later, in 2001–02. In the NLAES, individuals with missing BMI were slightly more likely than subjects in the analysis samples to report a family history of alcoholism (OR=1.11 p=0.03), and this effect was more pronounced in the NESARC (OR=1.33 p<0.0001). There were no differences in obesity between the analysis sample and individuals with missing family history in either the NLAES or the NESARC.
