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Table 1 Association of frequency of the psychiatric disorders by gender in children with nail biting.

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

Disorder Boys (n = 41) Girls (n = 22)
  n % n %
Attention deficit hyperactivity disorder (n = 47) 32 78.0 15 68.2
Oppositional defiant disorder (n = 23) 16 39.0 7 31.8
Conduct disorder (n= 4) 4 9.8 0 0.0
Tic disorder(n- = 8) 7 17.1 1 4.5
Major depressive disorder (n = 4) 2 4.9 2 9.1
Separation anxiety disorder (n = 13) 8 19.5 5 22.7
Mental retardation (n = 6) 5 12.2 1 4.5
Obsessive compulsive disorder (n = 7) 6 14.6 1 4.5
Enuresis(n = 10) 10 24.4 0 0.0
Pervasive developmental disorder (n = 2) 2 4.9 0 0.0
At least one of the above psychiatric disorders (n = 59) 41 100 18 81.8