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. Author manuscript; available in PMC: 2017 Aug 30.
Published in final edited form as: Psychiatry Res. 2016 May 24;242:218–225. doi: 10.1016/j.psychres.2016.05.017

Table 1.

Sample characteristics of the children involved in the current study

N‡ %
Sex 3768
    Male 1966 52.2
    Female 1802 47.8
Age, Mean (SD) 3818 10.99 (0.90)
School 3915
    1 1330 34.0
    2 1236 31.6
    3 906 23.1
    4 443 11.3
Grade 3914
    4th 1319 33.7
    5th 1261 32.2
    6th 1334 34.1
Father's education 3440
    Primary school 182 5.3
    Middle school 887 25.8
    High school 1211 35.2
    College or above 1160 33.7
Mother's education 3434
    Primary school 289 8.4
    Middle school 1046 30.5
    High school 1159 33.8
    College or above 940 27.4
‡

Number of students differed across sample characteristics due to missing values.