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Table 3 Selected studies on prevalence of ADHD in China

From: Current state and recent developments of child psychiatry in China

Time Region Definition Age (years) Screening (Diagnostic) Instrument Sample size Prevalence (%)* Age group with the highest prevalence (years) Gender ratio (M: F) Other risk factors
1981 Beijing ADD 6-13 Self made questionnaire (ICD-9) 2770 5.8 (N/A) 9 7 (P < 0.05) Lower educational level of the parents
1983 Hebei ADD 6-13 Self made questionnaire (DSM-III) 1588 3.3 (N/A) N/A 4.8 (P < 0.05) N/A
2003 Guilin ADHD 5-12 Conners (DSM-IV) 9162 4.25 (C 1.44, I 1.00, HI 1.81) 8-9 2.18 (P < 0.05) Birth injury, Lower educational level of parents
2007 6 cities in Northeast ADHD 6-12 Self made questionnaire (DSM-IV) 1051 5.4 (C 1.14, I 0.67, HI 3.6) 9 1.6 No different between city and rural areas. Lower education level of parents
2009 Shanghai ADHD 5-15 19 item questionnaire (DSM-IV) 5648 4.6 (C 1.8, I 2.4, HI 0.4) 6-7 2.41 (P < 0.05) N/A
2010 Shenzhen ADHD 7-13 Conners PSQ and TRS (DSM-IV) 8193 5.39 (C 3.73, I 1.21, HI 0.45) 5-6 2.94 (P < 0.05) N/A
2011 Sichuan ADHD 6-16 19 item questionnaire (DSM-IV) 2350 4.81 (C 1.40, I 2.64, HI 0.77) 6-7 2.53 (P < 0.05) Positive family history, Birth injury, Less parental care
2014 Xinjiang ADHD 6-14 Conners PSQ (DSM-IV) 2066 4.7%(C 1.54, I 2.42, HI 0.73) N/A 2.03 (P < 0.05) N/A
  1. *(Subtype, C = combined, I = Inattentive, HI = Hyperactivity).