Preterm Birth and Childhood Wheezing Disorders: A Systematic Review and Meta-Analysis
(A) unadjusted effect estimates; (B) adjusted effect estimates. Subgroups taken from individual studies noted in parentheses. Heterogeneity: I2 (unadjusted) = 92% (95% CI 87%–94%); I2 (adjusted) = 89% (95% CI 82%–93%). Confounders adjusted for in individual studies are outlined in Figure 3 and Table S3. LRI, lower respiratory infection; PTB, preterm birth; WD, wheezing disorders.