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Table 1 Proportion of the individuals for each affection status category and their mean age (TT Lifelong abstainers; SD Social Drinkers; HD Heavy drinkers; RDCA Research Diagnostic Criteria Alcoholism; ADS Alcohol Dependence Syndrome)

From: Genetic linkage analysis supports the presence of two susceptibility loci for alcoholism and heavy drinking on chromosome 1p22.1-11.2 and 1q21.3-24.2

Affection Status Family Sample
  Number Genotyped % Mean age ± SD (yrs) in all cases and relatives
TT 7 4 58.2 ± 13
SD 43 24 50.4 ± 17.1
HD 22 13 41.5 ± 14.1
RDCA 50 28 41.5 ± 13.5
ADS 54 31 42.1 ± 11.9