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The impact of inspiratory muscle training (IMT) on the duration of weaning from mechanical ventilation. After exclusion of studies at serious risk of bias, the effect remained significant (3.2 d; 95% CI, 0.6–5.8 d; I2 = 95%). Weight refers to the contribution of each study to the meta-analysis estimate of effect. CI = confidence interval; MD = mean difference; SD = standard deviation.
