Univariate and multivariate Cox proportional hazard analysis of risk factors for death in patients with PH-IIP.

Estimated hazard ratios (HR), 95% confidence intervals (CI) and p-values were calculated by Cox regression analyses. SvO2 denotes mixed venous oxygen saturation; 6MWD, 6 min walking distance; NYHA, New York Heart Association.* per 5-years increase# per 10m increase$ per 5% increase§ per 5 mmHg increase& per 100 pg/ml increaseUnivariate and multivariate Cox proportional hazard analysis of risk factors for death in patients with PH-IIP.