Adjusted Strengths and Difficulties (SDQ) Total Problems Score by Intervention Group, Time, and General Practitioner (GP) Practice Type
To estimate an effect size within the subgroup of GPs in child-predominant practices, we computed baseline to 6-month SDQ change scores. Using the same variables for adjustment as noted previously, the mean decline was 6.9 (95% CI, 5.5-8.3) points for children seen by intervention GPs and 3.6 (95% CI, 2.5-4.7) points for children seen by control GPs, producing an effect size of 