Table 2. Cause-specific mortality by smoking status (N = 162,098).
| Characteristics | Smoking (+) (N = 3,983)(PYs = 47533.57) a | Smoking (-)(N = 158,115)(PYs = 1,900,899.06) a | p | ||
|---|---|---|---|---|---|
| Cause of deaths | N. of deaths | Incidence b | N. of deaths | Incidence b | |
| Total mortality | 82 | 172.5 | 820 | 43.1 | <0.001 |
| Unnatural death | 66 | 138.8 | 624 | 32.8 | <0.001 |
| Accident | 50 | 105.2 | 506 | 26.6 | <0.001 |
| Suicide | 14 | 29.5 | 92 | 4.8 | <0.001 |
| Homicide | 1 | 2.1 | 10 | 0.5 | 0.154 |
| Undetermined for unnatural deaths | 1 | 2.1 | 16 | 0.8 | 0.360 |
| Natural death | 16 | 33.7 | 196 | 10.3 | <0.001 |
| Cancer | 1 | 2.1 | 74 | 3.9 | 0.536 |
| Endocrine or Metabolic | 1 | 2.1 | 8 | 0.4 | 0.093 |
| Neurological | 1 | 2.1 | 5 | 0.3 | 0.024 |
| Cardiovascular | 5 | 10.5 | 20 | 1.1 | <0.001 |
| Respiratory | 1 | 2.1 | 7 | 0.4 | 0.066 |
| Gastrointestinal | 1 | 2.1 | 6 | 0.3 | 0.043 |
| Genitourinary | 0 | 0.0 | 6 | 0.3 | 0.699 |
| Skin | 0 | 0.0 | 8 | 0.4 | 0.656 |
| Bone | 0 | 0.0 | 6 | 0.3 | 0.699 |
| Others | 2 | 4.2 | 18 | 0.9 | 0.029 |
| Undetermined for natural deaths | 4 | 8.4 | 38 | 2.0 | 0.002 |
a. PYs: person-years
b. incidence: number per 100,000 person-years.
The difference of incidence in specific causes of deaths between smoker and non-smoker group were calculated using Wilcox (Gehan) Statistic by survival life table analysis.