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Table 1 Characteristics of extended families used in linkage analysis to identify loci for the number of grams of alcohol consumed per day.

From: Mapping susceptibility loci for alcohol consumption using number of grams of alcohol consumed per day as a phenotype measure

Category Sample sizeA Mean ± SEM (Range)
No. of subjects per family 329 14.23 ± 0.46 (7–84)
No. of drinkers per pedigree 329 6.27 ± 0.24 (1–46)
Age of subjects 2565 43.14 ± .33 (5–83)
   Male subjects 1233 42.23 ± 0.49 (11–82)
   Female subjects 1332 43.97 ± 0.46 (5–83)
Age of drinkers 2063 42.85 ± 0.35 (13–81)
   Male drinkers 1047 42.46 ± 0.50 (13–81)
   Female smokers 1016 43.25 ± 0.50 (13–80)
No. of grams of alcohol consumed per day 2063 18.02 ± .54 (2–537)
   Male drinkers 1047 24.96 ± 0.94 (2–537)
   Female drinkers 1016 10.87 ± 0.40 (2–139)
  1. AThe sample sizes in the first two rows are numbers of pedigrees and those in the rest of the table are numbers of individual subjects.