highly significantp < 0.001
Clinical Global Impression (CGI) A highly significant treatment effect was found on the CGI scale, with a benefit of − 0.63 (− 0.84; − 0.47; p < 0.001, Suppl. 9.2.1) compared with the placebo, confirmed by the results from the SMM model − 0.67 (− 0.97; − 0.36, p < 0.001, Suppl. 9.3, Fig. 1 ), and found to be homogeneous among studies.