Table 1 Age and smoking habits for 129 healthy volunteers
Number | Mean age ± SD (range) in years | Current average number of cigarettes per day ± SD (range) | Total number of packages in lifetime mean (range) | |
|---|---|---|---|---|
Non-smokers | 64 (34 males) | 51.7 ± 18.5 (20 to 81) | 0 | 0 |
Ex-smokers | 39 (21 males) | 59.2 ± 15.4 (25 to 83) | 0 | 4,497 (66 to 28,220) |
Active smokers | 26 (15 males) | 47.2 ± 19.4 (21 to 79) | 11.2 ± 8.6 (1 to 30) | 5,991 (60 to 24,630) |