Table 1 General characteristics of study participants
From: Dietary behaviour, psychological well-being and mental distress among adolescents in Korea
| Â | Unweighted frequency | Weighted % |
|---|---|---|
Sex | ||
 Boys | 33,803 | 52.2 |
 Girls | 31,725 | 47.8 |
 Age (years), mean (sd) | 65,212 | 15.1 (0.02) |
BMI | ||
 Thinness (< 5th percentile) | 3586 | 5.7 |
 Normal weight (5th ≤ BMI < 85th percentile) | 48,979 | 77.0 |
 Overweight (85th ≤ BMI < 95th percentile) | 2994 | 4.5 |
 Obesity (≥ 95th percentile) | 8182 | 12.8 |
School | ||
 High school | 33,309 | 54.6 |
 Middle school | 32,219 | 45.4 |
Types of school | ||
 Mixed | 41,445 | 62.0 |
 Boys only | 12,032 | 19.3 |
 Girls only | 12,051 | 18.7 |
Paternal education level | ||
 High school or less | 19,610 | 36.6 |
 College or higher | 31,977 | 63.4 |
Maternal education level | ||
 High school or less | 23,497 | 44.0 |
 College or higher | 28,860 | 56.0 |
Perceived socio-economic status | ||
 High/high-middle | 24,244 | 37.2 |
 Middle | 31,056 | 47.3 |
 Low-middle/Low | 10,228 | 15.6 |
Place of residence | ||
 Rural area | 4856 | 5.8 |
 Large city | 29,046 | 43.3 |
 Medium-sized city | 31,626 | 50.8 |
Physical activity (≥ 60 min) | ||
 No | 23,817 | 36.8 |
 1–2/week | 20,859 | 32.0 |
 3+/week | 20,852 | 31.3 |
 Ever smoking in lifetime (yes) | 9511 | 14.8 |
 Ever alcohol drinking in lifetime (yes) | 24,804 | 38.8 |