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Table 1 Descriptive characteristics according to BED after matching groups using the PSM

From: Binge eating disorder and depressive symptoms among females of child-bearing age: the Korea Nurses' Health Study

  All (N = 1,004) No (N = 502) Yes (N = 502)  
n % n % n % P
Depressive symptom
 Normal 188 18.7 95 18.9 93 18.5 0.882
 Mild 386 38.4 194 38.6 192 38.2  
 Moderate 23.1 23.1 116 23.1 115 22.9  
 Moderately severe 140 13.9 65 12.9 75 14.9  
 Severe 59 5.9 32 6.5 27 5.5  
Age (in years)
  ≤ 29 431 42.9 219 43.6 212 42.2 0.895
 30–39 457 45.5 225 44.8 232 46.2  
  ≥ 40 116 11.6 58 11.6 58 11.6  
Level of education
 Masters or higher 54 5.4 26 5.2 28 5.6 0.562
 3-year college 519 51.7 268 53.4 251 50.0  
 4-year university 431 42.9 208 41.4 223 44.4  
Annual income
  < $20,000 50 5.1 26 5.2 24 4.8 0.640
 $20,000–$29,999 130 12.9 58 11.6 72 14.3  
 $30,000–$39,999 422 42.0 208 41.4 214 42.6  
 $40,000–$49,999 380 37.8 198 39.4 182 36.3  
  ≥ $50,000 22 2.2 12 2.4 10 2.0  
Marital status
 Single 764 76.1 394 78.5 370 73.7 0.076
 Married 240 23.9 108 21.5 132 26.3  
Alcohol consumption
 Never 161 16.1 71 14.2 90 17.9 0.211
 Occasionally 705 70.2 364 72.5 341 67.9  
 Frequently 138 13.7 67 13.3 71 14.2  
BMI (in kg/m2)*
 Normal (18.5–22.9) 621 61.8 308 61.4 313 62.3 0.000
 Underweight (< 18.5) 114 11.4 81 16.1 33 6.6  
 Overweight (≥23) 269 26.8 113 22.5 156 31.1  
Self-rated health        
 Poor 188 18.7 94 18.7 94 18.7 0.937
 Fair 509 50.7 257 51.2 252 50.2  
 Good 307 30.6 151 30.1 156 31.1  
Sleep (quartile)
 1 (least sleep problem) 150 14.9 74 14.7 76 15.1 0.946
 2 263 26.2 128 25.5 135 26.9  
 3 252 25.1 127 25.3 125 24.9  
 4 339 33.8 173 34.5 166 33.1  
Stress (quartile)
 1 (least stressed) 262 26.1 139 27.7 123 24.5 0.584
 2 301 30.0 146 29.1 155 30.9  
 3 256 25.5 122 24.3 134 26.7  
 4 185 18.4 95 18.9 90 17.9  
Shift work
 No 222 22.1 106 21.1 116 23.1 0.447
 Yes 782 77.9 396 78.9 386 76.9  
  1. Note: Occasionally: sometimes in a month; Frequently: sometimes in a week; BMI: body mass index
  2. *BMI categories are according to the World Health Organization Asia Pacific Region and the Korean Society for the Study of Obesity