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. 2011 Apr 11;4:116. doi: 10.1186/1756-0500-4-116

Table 5.

The comparison of the mean score of different domains of parent reported SDQ between children with nail biting (> = 1 day per week) and that of those without nail biting.

Scale Nail biting Mean Standard Deviation 95% Confidence Interval for Mean

Lower Bound Upper Bound
Prosocial behavior score Without 8.15 1.6 8.0 8.3
With 7.6 2.0 7.2 7.9
Hyperactivity/inattentiveness scale Without 5.5 1.6 5.4 5.7
With 5.8 1.7 5.5 6.0
emotional problem score Without 3.7 1.8 3.5 3.8
With 4.3 2.1 4.0 4.6
Conduct problem Score Without 2.9 1.4 2.8 3.0
With 3.2 1.4 3.0 3.4
Peer problem score Without 4.9 1.5 4.8 5.1
With 5.1 1.6 4.8 5.4
Total score Without 15.9 4.7 15.4 16.4
With 17.3 4.6 16.5 18.1