Table 2 Demographic characteristics of participants
Variable | Non-smoker (n = 22) | Smoker (n = 22) | t-test | |||
|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | t-value | P-value | |
Age (years) | 41.5 | 15.8 | 46.0 | 11.4 | 1.1 | .290 |
Duration of smoking (years) | NA | NA | 24.3 | 9.7 | NA | NA |
Number of cigarettes smoked daily | NA | NA | 17.4 | 7.0 | NA | NA |
Brinkman index | NA | NA | 430 | 246.7 | NA | NA |