Fig. 4From: Respiratory syncytial virus prophylaxis for prevention of recurrent childhood wheeze and asthma: a systematic reviewMeta-analysis with very low-quality studies removed. Two studies carried a significant risk of bias by confounding, skewing the results and showing the opposite effect to the overall result. Upon removal of these studies in a sub-group analysis, the overall pooled relative risk became statistically significant at 0.42 (95% CI = 0.22 to 0.80)Back to article page