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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.