Age (years) 20-29 30-39 40< total Age average
With family history 7 (11.6%) 31 (52.7%) 22 (36.7%) 60 (100%) 36.5
Without family history 26 (32.5%) 32 (40%) 22 (27.5%) 80 (100%) 34.4
Table 1: Age of addicts with and without family history, Chi-square test (p-value <0.05).