“…We could not find the additional material for 5 articles (mean score: 13.8 [SD 3.1]). 18,19,44,48,83 For the remaining 19 articles, 22,23,25,35,39,41,50,51,74,78,81,91–93,98,104,110,116,119 scoring included the supplementary material. The mean score of these 19 articles was 18.3 (SD 3.7; range 13–25), significantly higher than the mean score of 15.5 (SD 4.0) for the 81 articles without additional information ( P = .007; 95% CI on the observed difference = 0.8–4.8).…”