Table 1: Demographic characteristics of the study population.
| Males | 33 (68.7) |
| Females | 15 (31.3) |
| Age* (years) | 71.6 (69.22-74.02) |
| Smoking habit | |
| Never smoked | 16 (33.3%) |
| Still smoke | 25 (52.1%) |
| Formerly smoked | 7 (14.6%) |
| Died | 17 (35.4) |
| Charlson Index* | 2.77 (1.8-3.8) |
Abbreviations: Absolute values and (%). *: Average and 95CI.