Pleural effusion during weaning from mechanical ventilation: a prospective observational multicenter study.

To evaluate independent factors associated with the presence of moderate-to-large pleural effusion at weaning start or with failure of the weaning process, significant or marginally significant ( p < 0.10) bivariate risk factors (using the above mentioned tests) were examined using univariate and multivariable backward stepwise logistic regression analysis.

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