Objectives: The requirement of prolonged mechanical ventilation (PMV) is associated with increased medical care\ndemand and expenses, high early and long-term mortality, and worse life quality. However, no study has assessed\nthe prognostic factors associated with 1-year mortality among PMV patients, not less than 21 days after surgery. This\nstudy analyzed the predictors of 1-year mortality in patients requiring PMV in intensive care units (ICUs) after\nsurgery.\nMethods: In this multicenter, respective cohort study, 124 patients who required PMV after surgery in the ICUs of\nfive tertiary hospitals in Beijing between January 2007 and June 2016 were enrolled. The primary outcome was the\nduration of survival within 1 year. Predictors of 1-year mortality were identified with a multivariable Cox\nproportional hazard model. The predictive effect of the ProVent score was also validated.\nResults: Of the 124 patients enrolled, the cumulative 1-year mortality was 74.2% (92/124). From...............
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