Table 2 Mean micronuclei in transferrin-positive reticulocyte frequency by age, drinking frequency, and smoking status

Age

 Younger subjects (≤45 years)

69

0.050 ± 0.0051

 Elderly subjects (>45 years)

87

0.064 ± 0.0048* (0.52)^a

Drinking frequency

 Habitual drinkers (≥3 times a week)

74

0.067 ± 0.0052

 Non-habitual drinkers (<3 times a week)

82

0.050 ± 0.0046* (0.68)^a

Smoking status

 Never

64

0.052 ± 0.0050

 Ever^b

92

0.062 ± 0.0048