Table 1. Characteristics of participants by the status of SHSE.
| Variables | None SHSE (n = 632) | SHSE (n = 357) | p value |
|---|---|---|---|
| Age, years | 15.5 ± 0.6 | 15.4 ± 0.5 | 0.003 |
| BMI, kg/m2 | 21.7 ± 3.0 | 21.8 ± 3.1 | 0.634 |
| SBP, mmHg | 110.1 ± 13.1 | 109.6 ± 13.4 | 0.608 |
| DBP, mmHg | 61.0 ± 7.5 | 61.0 ± 7.8 | 0.994 |
| Fasting blood sugar, mg/dl | 86.8 ± 7.0 | 88.0 ± 7.2 | 0.012 |
| Total cholesterol, mg/dl | 156.5 ± 26.9 | 153.7 ± 25.4 | 0.112 |
| BDI score | 7.5 ± 5.3 | 8.7 ± 6.1 | 0.001 |
| Sex | |||
| Male | 342 (54.1) | 153 (42.9) | 0.001 |
| Female | 290 (45.9) | 204 (57.1) | |
| Physical activity (n = 958) | |||
| None | 124 (20.2) | 70 (20.4) | 0.633 |
| <2 per week | 52 (8.5) | 34 (9.9) | |
| 2-<4 per week | 334 (54.4) | 174 (50.6) | |
| ≥4 per week | 104 (16.9) | 66 (19.2) | |
| House income, won (n = 723) | |||
| <3.0 million | 92 (19.7) | 62 (24.2) | 0.050 |
| 3.0 -<5.0 million | 189 (40.5) | 115 (44.9) | |
| ≥5.0 million | 186 (39.8) | 79 (30.9) | |
| Depressive symptoms by BDI score | |||
| Normal | 448 (70.9) | 230 (64.4) | 0.042 |
| Having depressive symptoms | 184 (29.1) | 127 (35.6) |
Data expressed as mean ± standard deviation or number (%). BMI, Body mass index; SBP, Systolic blood pressure; DBP, Diastolic blood pressure; BDI, Beck Depression Inventory; SHSE, Secondhand smoke exposure.