Table 1.
General characteristics of the groups studied.
| Study group | (n=84) | Age (years) (mean ±SD) | Average no of cigarettes/day (mean ±SD) | Duration of employment (years) (mean ±SD) | |
|---|---|---|---|---|---|
| Control (n=40) | Smokers | 21 | 42.50±2.25 | 18.50 ± 2.83 | |
| Non-smokers | 19 | 40.25±3.76 | |||
| Alcoholics | 18 | 44.93±3.05 | 280.56 ± 20.81 | ||
| Non- alcoholics | 22 | 38.75±4.20 | |||
| Workers (n=44) | Smokers | 24 | 43.46±3.72 | 21.00 ± 3.05 | 8.24 ±1.44 |
| Non-smokers | 20 | 37.65±2.99 | 9.55 ±0.84 | ||
| Alcoholics | 19 | 41.50±3.51 | 312.47± 18.76 | 6.75 ±1. 26 | |
| Non- alcoholics | 25 | 41.00±2.66 | 7.86 ± 0 85 |