Table 3

Distribution of age and personal characteristics among case and control groupsa whose cytogenetic samples were included in the analysis

VariablesCases (n = 22)Controls (n = 22)
Age (yr)64.82 ± 7.8563.91 ± 7.13
Smoker (%)6 (27.3)5 (22.7)
 Duration of smoking (yr)36.83 ± 13.0146.20 ± 7.9
 Quantity of smoking/day (cigarettes)17.50 ± 7.5817.00 ± 4.47
Alcohol drinking (%)6 (27.3)3 (13.6)
Tea drinking (%)6 (27.3)9 (40.9)
Duration of artesian water drinking (yr)29.85 ± 11.9032.63 ± 12.76
  • a No significant difference between these two groups.