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Table 1 General characteristics of study participants

From: Dietary behaviour, psychological well-being and mental distress among adolescents in Korea

  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
  1. All values are presented as weighted Mean (SD) or weighted % as appropriate