| Variables | Case % | Mean ± S.E | Control % | Mean ± S.E |
| Age |
|
|
|
|
| 18 - 40 | 53.3 |
41.3 ± 14.3 | 48.6 | 42.9 ± 16.4 |
| 40 - 60 | 29.6 | 30.3 | ||
| >60 | 17.1 | 21.1 | ||
| Sex |
| |||
| Male | 52.6 | 50.0 ± 3.68 | 51.4 | 50.0 ± 1.98 |
| Female | 47.4 | 48.6 | ||
| Place of Residence |
|
|
|
|
| Rural | 38.5 | 50.0 ± 16.26 | 39.4 | 50.0 ± 14.99 |
| Urban | 61.5 | 60.6 | ||
| Occupation |
|
|
|
|
| Housewife | 19.3 | 16.67 ± 5.76 | 16.9 | 16.66 ± 5.80 |
| Farmer | 20.7 | 23.2 | ||
| Service | 17.8 | 19.0 | ||
| Business | 22.2 | 21.1 | ||
| Retired | 13.3 | 12.0 | ||
| Others | 6.7 | 7.8 | ||
| Smoking status |
|
|
|
|
| Smoker | 23.7 | 33.33 ± 30.41 | 26.7 | 33.33 ± 30.10 |
| Non-smoker | 67.4 | 66.2 | ||
| Ex-smoker | 8.9 | 7.1 | ||