Table 4 Parameters predictive of event-free survival in forward multivariate Cox proportional hazards analysis

From: Sex-specific cardiopulmonary exercise testing parameters as predictors in patients with idiopathic pulmonary arterial hypertension

Populations studied

Model

Variables

HR

95% CI

P-value

All patients (n=57)

Model 1

Peak PETCO2

0.931

0.881∼0.984

0.012

Male patients (n=21)

Model 2

Peak PETCO2

0.894

0.816∼0.978

0.015

Female patients (n=36)

Model 2

Peak O2 pulse

0.555

0.313∼0.985

0.044

  1. Abbreviations: BMI, body mass index; CI, confidence interval; FC, functional classification; HR, heart rate; Model 1, adjusted for age, sex, BMI and WHO FC; Model 2, adjusted for age, BMI and WHO FC; PETCO2, end tidal partial pressure of CO2; WHO, World Health Organization.
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