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Association of onset age of nail biting by the psychiatric disorders |
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| Disorder |
Mean age of onset |
Significance* |
|
|
||
| With ADHD (n = 46) |
6.2 |
U = 267.5, N1 = 46, N2 = 16, p = 0.1 |
| Without ADHD(n = 16) |
5.3 |
|
| With ODD(n = 23) |
5.2 |
U = 383.5, N1 = 39, N2 = 23, p = 0.3 |
| Without ODD(n = 39) |
6.4 |
|
| With CD(n = 4) |
4.7 |
U = 96.0, N1 = 58, N2 = 4, p = 0.5 |
| Without CD(n = 58) |
6 |
|
| With Tic(n = 8) |
6.4 |
U = 188.5, N1 = 8, N2 = 54, p = 0.5 |
| Without Tic(n = 45) |
5.9 |
|
| With MDD(n = 4) |
11.4 |
U = 188.5, N1 = 4, N2 = 54, p = 0.5 |
| Without MDD(n = 58) |
5.6 |
|
| With SAD(n = 12) |
5.5 |
U = 53.5, N1 = 12, N2 = 50, p = 0.07 |
| Without SAD(n = 50) |
6.0 |
|
| With Enuresis(n = 10) |
4.9 |
U = 222.0, N1 = 10, N2 = 52, p = 0.4 |
| Without Enuresis(n = 52) |
6.1 |
|
| With OCD(n = 7) |
6.7 |
U = 158.0, N1 = 7, N2 = 55, p = 0.4 |
| Without OCD(n = 55) |
5.8 |
|
| With PDD(n = 2) |
7.0 |
U = 44.0, N1 = 2, N2 = 60, p = 0.5 |
| Without PDD(n = 60) |
5.9 |
|
| With MR(n = 6) |
5.5 |
U = 124.0, N1 = 6, N2 = 56, p = 0.3 |
| Without MR(n = 56) |
6.0 |
|
|
ADHD = Attention deficit hyperactivity disorder, ODD = Oppositional defiant disorder, CD = Conduct disorder, MDD = Major depressive disorder, SAD = Separation anxiety disorder, MR = Mental retardation, OCD = Obsessive compulsive disorder, PDD = Pervasive developmental disorder * Mann-Whitney U test. | ||
Ghanizadeh Child and Adolescent Psychiatry and Mental Health 2008 2:13 doi:10.1186/1753-2000-2-13 |
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