Table 2.

The scores of SDQ and the prevalence of psychological and behavioral problems among the children.

	Scores (Mean ± SD)	Negative [n (%)]	Positive [n (%)]
The SDQ scale
Conduct problems	1.80 ± 1.41	1175 (93.0)	89 (7.0)
Hyperactivity-inattention	3.48 ± 2.13	1185 (93.8)	79 (6.3)
Peer problems	2.93 ± 1.65	1180 (93.4)	84 (6.6)
Prosocial behaviors	7.24 ± 2.19	1134 (89.7)	130 (10.3)
Emotional symptoms	1.43 ± 1.69	1205 (95.3)	59 (4.7)
Total difficulty	9.63 ± 4.79	1160 (91.8)	104 (8.2)

Abbreviations: SD, standard deviation; SDQ, The Strengths and Difficulties Questionnaire;%, percentage.