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Table 1 General characteristics according to sleep quality in 2012

From: Changes in child abuse experience associated to sleep quality: results of the Korean Children & Youth Panel Survey

Variables Total   Sleep quality   P-value Sleep duration P-value
  Good   Poor  
N % N % N % Mean ± SD
Total 1276   975 76.4 301 23.6   7.126 1.129  
Changes in child abuse experience        <.0001    0.4449
  No→No 815 63.9 657 80.6 158 19.4   7.294 0.946  
  No→Yes 167 13.1 114 68.3 53 31.7   7.373 1.019  
  Yes→No 166 13.0 122 73.5 44 26.5   7.495 0.880  
  Yes→Yes 128 10.0 82 64.1 46 35.9   7.388 1.067  
Gender        0.3618    <.0001
  Men 644 50.5 499 77.5 145 22.5   7.497 0.931  
  Women 632 49.5 476 75.3 156 24.7   7.180 0.967  
Residency region        0.9658    0.3062
  Capital city 282 22.1 214 75.9 68 24.1   7.233 1.001  
  Metropolitan areas 436 34.2 333 76.4 103 23.6   7.395 0.953  
  Others 558 43.7 428 76.7 130 23.3   7.351 0.946  
Household income level        0.083    0.0470
  Quartile 1 (lowest) 285 22.3 215 75.4 70 24.6   7.491 0.948  
  Quartile 2 345 27.0 250 72.5 95 27.5   7.442 0.967  
  Quartile 3 366 28.7 283 77.3 83 22.7   7.287 0.970  
  Quartile 4 (highest) 280 21.9 227 81.1 53 18.9   7.130 0.920  
Academic record        0.0035    <.0001
  Low 384 30.1 271 70.6 113 29.4   7.536 0.939  
  Middle 361 28.3 279 77.3 82 22.7   7.378 0.955  
  High 531 41.6 425 80.0 106 20.0   7.173 0.955  
Father’s education        0.0841    0.3805
  High school grade/lower 547 42.9 405 74.0 142 26.0   7.471 0.961  
  College grade/higher 729 57.1 570 78.2 159 21.8   7.242 0.952  
Mother’s education        0.0321    0.3010
  High school grade/lower 703 55.1 521 74.1 182 25.9   7.438 0.967  
  College grade/higher 573 44.9 454 79.2 119 20.8   7.219 0.943  
Perceived health status        0.0026    0.3855
  Good 1179 92.4 913 77.4 266 22.6   7.344 0.948  
  Bad 97 7.6 62 63.9 35 36.1   7.293 1.122  
Depressive symptoms        <.0001    0.5892
  Yes 513 40.2 320 62.4 193 37.6   7.336 0.915  
  No 763 59.8 655 85.8 108 14.2   7.346 1.029  
Mobile phone addiction score        <.0001    0.1071
  Low(0–17) 435 34.1 358 82.3 77 17.7   7.415 0.904  
  Middle(8–11) 427 33.5 335 78.5 92 21.5   7.334 0.902  
  High(12–21) 414 32.4 282 68.1 132 31.9   7.268 1.072