3.
不同性别、年龄居民吸烟起始时间
Initial time of smoking for male and female with different ages
| Age (years) |
Male | Female | X2 | P | |||||
| ≤15 years old | > 15 years old | Proportion of smokers stared smoking ≤15 years old (%) | ≤15 years old | > 15 years old | Proportion of smokers stared smoking ≤15 years old (%) | ||||
| 40-60 | 62 | 1 073 | 5.46 | 0 | 55 | 0.00 | 2.160 | 0.142 | |
| 61-80 | 29 | 486 | 5.63 | 4 | 35 | 10.26 | 0.004 | 0.949 | |
| > 80 | 0 | 39 | 0.00 | 0 | 6 | 0.00 | - | - | |
| Total | 91 | 1 598 | 5.39 | 4 | 96 | 4.00 | 0.362 | 0.548 | |