Fig. 5From: Placebo response in pharmacological and dietary supplement trials of autism spectrum disorder (ASD): systematic review and meta-regression analysisCGI-I positive placebo response. Square and bars represent the point estimate of the proportion of responders and its 95% confidence interval for each study. The size of the squares is proportional to the weight of the study. The diamonds represent the pooled proportion and its 95% confidence intervals for each subgroup and overall. Heterogeneity is quantified with a χ2 test (Q) and I2. CGI-I positive responders: number of participants with a positive response defined as at least much improvement in the CGI-I (if not reported, it was imputed using a validated method); Total: total number of participants on placeboBack to article page