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Years and quantity of smoking, alcohol consumption, and betel nut chewing.
| Variables | Years [Mean (SD)] | Quantity per day [Mean (SD)] |
|---|---|---|
| Smoking (n = 141) (number of cigarette) | 18.22 (14.42) | 18.53 (24.93) |
| Alcohol consumption (n = 77) (mL) | 8.90 (13.22) | 76.42 (147.43) |
| Betel nut chewing (n = 105) (piece) | 6.25 (8.17) | 12.92 (19.31) |
