Characteristics of social demographic factors
| Variable | Range | Non-smoking (n=49,623) |
Smoking (n=7,680) |
Sum (n=57,303) |
P-value |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | |||||
| Sex | Male | 24,382 | 81.7 | 5,459 | 18.3 | 29,841 | 100.0 | <0.001 | ||
| Female | 25,241 | 91.9 | 2,221 | 8.1 | 27,462 | 100.0 | ||||
| School grade | Middle school | 27,055 | 92.1 | 2,329 | 7.9 | 29,384 | 100.0 | <0.001 | ||
| General high school | 18,940 | 81.1 | 3,717 | 18.9 | 22,657 | 100.0 | ||||
| Specialized high school | 3,628 | 68.9 | 1,634 | 31.1 | 5,262 | 100.0 | ||||
| Academic performance (last a year) |
First | 6,878 | 89.9 | 769 | 10.1 | 7,647 | 100.0 | <0.001 | ||
| Second | 12,944 | 90.5 | 1,352 | 9.5 | 14,296 | 100.0 | ||||
| Third | 15,245 | 88.5 | 1,989 | 11.5 | 17,234 | 100.0 | ||||
| Fourth | 10,483 | 83.4 | 2,087 | 16.6 | 12,570 | 100.0 | ||||
| Fifth | 4,073 | 73.3 | 1,483 | 26.7 | 5,556 | 100.0 | ||||
| Economic status | First | 5,482 | 85.9 | 897 | 14.1 | 6,379 | 100.0 | <0.001 | ||
| Second | 14,262 | 88.4 | 1,864 | 11.6 | 16,126 | 100.0 | ||||
| Third | 24,026 | 87.5 | 3,431 | 12.5 | 27,457 | 100.0 | ||||
| Fourth | 4,927 | 81.5 | 1,115 | 18.5 | 6,042 | 100.0 | ||||
| Fifth | 926 | 71.3 | 373 | 28.7 | 1,299 | 100.0 | ||||
| Sexual experience | No | 48,168 | 89.2 | 5,853 | 10.8 | 54,021 | 100.0 | <0.001 | ||
| Yes | 1,435 | 44.3 | 1,827 | 55.7 | 3,238 | 100.0 | ||||
P-value from chi-square test. *P<0.05.