From: Smoking, cessation and expenditure in low income Chinese: cross sectional survey
 |  | Urban n = 539 | Rural n = 486 | Migrant n = 1208 |
---|---|---|---|---|
Age of uptake of smoking in years | <15 | 3.4 | 5.6 | 3.5 |
 | 15–20 | 52 | 85 | 74 |
 | 21–25 | 37 | 10 | 15 |
 | >25 | 8 | 0 | 3.0 |
Quitting | Have tried to quit in last year | 9.1 | 3.0 | 7.1 |
 | Ever tried to quit | 18 | 10 | 9.4 |
 | Intend to quit | 22 | 14 | 28 |
Smoking expenditure RMB/month | <20 | 4.6 | 2.3 | 9.7 |
 | 20–49 | 11 | 17 | 31 |
 | 50–99 | 11 | 28 | 25 |
 | 100–249 | 45 | 43 | 30 |
 | 250+ | 28 | 9.6 | 4.9 |
 | Median (IQR) | 200 (230) | 100 (100) | 60(80) |
Smoking expenditure as % of personal income | 13.5 | 15.4 | 9.4 |