Table 4 The associations between study characteristics and the ADHD prevalence rate.
From: The Prevalence of Attention Deficit/Hyperactivity Disorder among Chinese Children and Adolescents
Study characteristics | β | 95% CI |
|---|---|---|
Years of data collection (1980–1990 as index) | ||
1991–2000 | 0.21* | 0.09–0.32 |
2001–2010 | 0.20* | 0.12–0.28 |
2011–2016 | 0.19* | 0.11–0.28 |
Geographical location (Mainland China as index) | ||
Hong Kong | −0.05 | −0.23–0.13 |
Taiwan | −0.07 | −0.18–0.04 |
Region (urban areas as index) | ||
Rural areas | 0.34* | 0.09–0.59 |
Urban, & rural areas | −0.02 | −0.09–0.06 |
Age of participants (preschoolers as index) | ||
School-aged children and adolescents | 0.19* | 0.10–0.27 |
Preschoolers, & school-aged children and adolescents | 0.16* | 0.06–0.26 |
Sample size (≤2,000 as index) | ||
2,000–5,000 | 0.03 | −0.05–0.10 |
>5,000 | −0.07 | −0.14–0.01 |
Procedure of screening and/or diagnosis (screening as index) | ||
Diagnosis | 0.09 | −0.02–0.20 |
Screening, & diagnosis | 0.06 | −0.004–0.12 |
