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Table 3 Association of gross physical damage of nail by the psychiatric disorder

From: Association of nail biting and psychiatric disorders in children and their parents in a psychiatrically referred sample of children

Disorder   Gross physical damage (%) Significance
Attention deficit hyperactivity disorder With (n = 43) 37.2 χ2 = 0.1, df = 1, p = 0.4
  Without (n = 14) 42.9  
Oppositional defiant disorder With(n = 21) 47.6 χ2 = 1.1, df = 1, p = 0.2
  Without (n = 36) 33.3  
Conduct disorder With(n = 3) 66.7 -
  Without (n = 54) 37.0  
Tic disorder With(n = 8) 62.5 χ2 = 0.2, df = 1, p = 0.1
  Without (n = 49) 34.7  
Major depressive disorder With(n = 3) 0.0 -
  Without (n = 54) 40.7  
Separation anxiety disorder With(n = 10) 30 χ2 = 0.7, df = 1, p = 0.4
  Without (n = 47) 40.4  
Mental retardation With(n = 5) 40 -
  Without (n = 52) 38.5  
Obsessive compulsive disorder With(n = 7) 57.1 χ2 = 0.4, df = 1, p = 0.2
  Without (n = 50) 36.0  
Enuresis With(n = 8) 50 χ2 = 0.6, df = 1, p = 0.3
  Without (n = 49) 36.7  
  1. *Fisher's exact test