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Table 2 Demographic and clinical characteristics in children with and without chronic illness at wave 2.

From: Chronicity of sleep problems in children with chronic illness: a longitudinal population-based study

Characteristics No chronic illness Chronic illness P-value
N 3730 295  
Girls, % (n) 53.3 (1988) 42.7 (126) < 0.001
Wave 1    
Age* 8.27 (8.24-8.30) 8.23 (8.13-8.33) .47
Emotional and behavioural problems (SDQ Parents-reported)*
   Emotion 1.16 (1.11-1.21) 1.89 (1.65-2.13) <.001
   Conduct 0.82 (0.78-0.86) 1.16 (0.99-1.33) <.001
   Hyperactivity 2.40(2.33-2.46) 3.27 (2.98-3.57) <.001
   Peer 1.16 (1.11-1.21) 1.89 (1.65-2.13) <.001
   Total 5.16 (5.02-5.30) 7.77 (7.03-8.50) <.001
Wave 2    
Body-mass index, % (n)    
Boys    <.001
   Underweight 4.5% (82) 3.2% (6)  
   Healthy weight 81.0% (1486) 73.8% (138)  
   Overweight 9.5% (175) 10.7% (20)  
   Obese 5.0% (91) 12.3% (23)  
Girls    .008
   Underweight 6.2% (133) 4.2% (6)  
   Healthy weight 80.6% (1730) 72.7% (104)  
   Overweight 9.1% (196) 14.7% (21)  
   Obese 4.1% (88) 8.4% (12)  
Economy, n (%)    .013
   Good 68.4 (3124) 64.2 (239)  
   Medium 29.0 (1326) 30.6 (114)  
   Poor 2.6 (120) 5.1 (19)  
Education mother, n (%)    .31
   Primary 8.3 (368) 10.7 (37)  
   Secondary 39.5 (1746) 38.8 (134)  
   College/University 52.1 (2303) 50.4 (174)  
Education father, n (%)    .74
   Primary 8.2 (374) 8.1 (30)  
   Secondary 37.7 (1712) 39.7 (147)  
   College/University 54.0 (2452) 52.2 (193)  
Emotional and behavioural problems (SDQ - Child-reported)*
   Emotion 1.61 (1.56-1.66) 2.16 (1.95-2.38) <.001
   Conduct 1.05 (1.02-1.09) 1.22 (1.08-1.36) .028
   Hyperactivity 2.52 (2.46-2.57) 3.08 (2.86-3.31) <.001
   Peer 1.09 (1.05-1.14) 1.70 (1.50-1.90) <.001
   Total 6.27 (6.14-6.41) 8.17 (7.59-8.76) <.001
  1. * Data presented as mean (95% CI)