In Cox multivariate regression model analysis, the outcome was
ventilator weaning, the time was days of mechanical respiratory
assistance treatment, the start time was the time of admission to the
intensive care unit, and the follow-up time was 30 days. PASP has an
independent effect on events after adjusting for potential confounders,
including time. The adjusted hazard ratio (HR) for 1 mmHg increase in
PASP was 0.94 (95% CI 0.90‒0.97) for weaning events (P
< 0.001 ). Abbreviations: HR, hazard ratio; CI, confidence
interval; PASP, pulmonary artery systolic pressure; IVSd,
interventricular end-diastolic thickness; **P < 0.01 .