borderline significantP = 0.06
Among potential confounding factors, no significant association was observed between DNA damage and current smoking status (Wilcoxon’s test, P = 0.41 for B lymphocytes and P = 0.78 for T lymphocytes) nor with alcohol consumption (Wilcoxon’s test, P = 0.25 for B lymphocytes and P = 0.21 for T lymphocytes), even if a slightly decreased level of DNA damage (25 and 30 % for B and T lymphocytes, respectively) was observed for daily drinkers with a borderline significant negative correlation with the quantity of alcohol expressed in g per day for T lymphocytes ( P = 0.06, ρ = −0.46).