Table 1.
Descriptive statistics for all variables, by smoking or not, South Korea (2018–2022) (N=207964)
| Variables |
Overall
(N=207964) |
Smoking
(N1=185029) |
No smoking
(N2=22935) |
Mean test | |||
|---|---|---|---|---|---|---|---|
| Proportion | n | Mean | Mean 1 | Mean 2 | Diff | p | |
| Sexual behavior | 0.044 | 0.023 | 0.214 | -0.19 | 0.000*** | ||
| Yes | 0.044 | 9240 | |||||
| No | 0.956 | 198724 | |||||
| Gender | 0.484 | 0.459 | 0.688 | -0.228 | 0.000*** | ||
| Male | 0.484 | 100736 | |||||
| Female | 0.526 | 107228 | |||||
| Age (years) (range: 12–18 years) | 14.94 | 14.827 | 15.866 | -1.039 | 0.000*** | ||
| Family economic situation (1–5) | 3.404 | 3.416 | 3.306 | 0.110 | 0.000*** | ||
| Disadvantaged | 0.016 | 3335 | |||||
| Low-income | 0.093 | 19334 | |||||
| Middle-income | 0.474 | 98611 | |||||
| High-income | 0.305 | 63359 | |||||
| Affluent | 0.112 | 23325 | |||||
| Academic achievement (1–5) | 3.143 | 3.197 | 2.705 | 0.492 | 0.000*** | ||
| Poor | 0.087 | 18037 | |||||
| Below average | 0.216 | 44817 | |||||
| Average | 0.301 | 62566 | |||||
| Good | 0.262 | 54525 | |||||
| Excellent | 0.135 | 28019 | |||||
| Grade (1–6) | 3.313 | 3.198 | 4.248 | -1.051 | 0.000*** | ||
| 1st junior high school | 0.193 | 40143 | |||||
| 2nd junior high school | 0.183 | 38136 | |||||
| 3rd junior high school | 0.176 | 36593 | |||||
| 1st high school | 0.155 | 32207 | |||||
| 2nd high school | 0.150 | 31251 | |||||
| 3rd high school | 0.142 | 29634 | |||||
| Father’s education level | 2.936 | 2.952 | 2.801 | 0.151 | 0.000*** | ||
| Junior middle school | 0.014 | 2973 | |||||
| Senior middle school | 0.226 | 47081 | |||||
| University | 0.569 | 118280 | |||||
| Other | 0.191 | 39630 | |||||
| Mother’s education level | 2.889 | 2.904 | 2.765 | 0.139 | 0.000*** | ||
| Junior middle school | 0.011 | 2382 | |||||
| Senior middle school | 0.263 | 54749 | |||||
| University | 0.550 | 114475 | |||||
| Other | 0.175 | 36358 | |||||
| Educational stage | 1.448 | 1.417 | 1.691 | -0.273 | 0.000*** | ||
| Middle school | 0.552 | 114872 | |||||
| High school | 0.448 | 93092 | |||||
| School type | 1.980 | 1.962 | 2.127 | -0.165 | 0.000*** | ||
| Girls’ school | 0.175 | 36308 | |||||
| Co-educational | 0.671 | 139456 | |||||
| Boys’ school | 0.155 | 32200 | |||||
| City scale | 1.636 | 1.632 | 1.666 | -0.034 | 0.000*** | ||
| Big city | 0.438 | 91159 | |||||
| Small- and medium-sized city | 0.488 | 101414 | |||||
| County district | 0.074 | 15391 | |||||
***
p<0.01.