Table 1 Demographic data of all groups
From: Chronic obstructive pulmonary disease in non-smokers: role of oxidative stress
| Â | Â | Case | Control | P value |
|---|---|---|---|---|
N = 40 | N = 30 | |||
Age | Range Mean ± SD | 45–76 60.2 ± 9 | 46–76 60.9 ± 7.2 | 0.731 |
Sex | Male Female | 30 (75%) 10 (25%) | 16 (53.3%) 14 (46.7%) | 0.181 |
Special habits | Non-smokers Ex-smokers Current smokers | 22 (55%) 18 (45%) 0 (0%) | 18 (60%) 12 (40%) 0 (0%) | 0.767 |