| Characteristics | Group A (n = 17) | Group B (n = 83) | Group C (n = 100) | Group A + B (n = 100) | A vs B | A vs C | B vs C | A + B vs C |
| p value | ||||||||
| Mean Age (yrs) | 51.94 ± 9.46 | 54.19 ± 12.41 | 48.9 ± 13.62 | 51.36 ± 13.01 | 0.482 | 0.379 | 0.007 | 0.007 |
| Gender | ||||||||
| Males | 15 (88.2) | 75 (90.40) | 71 (71) | 10 (10) | 0.709 | 0.137 | 0.001 | 0.001 |
| Females | 2 (11.8) | 8 (9.60) | 29 (29) | 90 (90) | ||||
| Smokers | 14 (82.4) | 62 (74.7) | 30 (30) | 76 (76) | 0.501 | 0.001 | 0.001 | 0.001 |
| Non smokers | 3 (17.6) | 21 (25.3) | 70 (70) | 24 (24) | ||||
| Pack years (Yrs) | 17.58 ± 11.77 | 14.57 ± 11.76 | 10.42 ± 10.41 | 13.80 ± 11.53 | 0.267 | 0.048 | 0.103 | 0.058 |
| Alcoholics | 7 (41.20) | 44 (53) | 22 (22) | 51 (51) | 0.791 | 0.09 | 0.001 | 0.001 |
| Non alcoholics | 10 (58.80) | 39 (37) | 78 (78) | 49 (49) | ||||
| Tobacco chewing | 4 (23.5) | 20 (24.1) | 16 (16) | 24 (24) | 0.96 | 0.367 | 0.367 | 0.157 |
| Non tobacco chewing | 13 (76.5) | 63 (75.9) | 84 (84) | 76 (76) | ||||
| Concurrent consumption of tobacco and alcohol | 6 (35.3) | 36 (43.37) | 12 (12) | 42 (42) | 0.900 | 0.011 | 0.013 | 0.012 |