The relative risks by smoking intensity index* on smoking related diseases
| Disease category | Smoking intensity index | ||
|---|---|---|---|
| I | II | III | |
| *Smoking intensity index: I, ⩽10 cigarettes/day; II, 11–20 cigarettes per day; III, >20 cigarettes (one pack)/day. | |||
| MVA, motor vehicle accidents. | |||
| Data adapted from Wen et al.8 | |||
| All causes (001–998) | 1.43 | 1.58 | 2.00 |
| Malignant neoplasm (140–208) | 1.44 | 1.75 | 2.36 |
| Diabetes mellitus (250) | 1.50 | 1.50 | 2.68 |
| Stroke (401–405, 430–438) | 1.44 | 1.64 | 2.58 |
| Ischaemic heart disease (410–414) | 1.93 | 2.07 | 2.90 |
| Respiratory system (460–519) | 1.54 | 1.75 | 1.75 |
| Digestive system (520–579) | 1.66 | 1.66 | 2.08 |
| Genitourinary system (580–629) | 1.80 | 2.42 | 2.78 |
| Ill defined conditions (780–799) | 1.51 | 1.51 | 2.38 |
| MVA (810–829) | 1.64 | 1.94 | 2.15 |
| Non-MVA (800–809,830–999) | 1.16 | 1.43 | 1.98 |