Mean pulmonary arterial pressure as a prognostic indicator in connective tissue disease associated with interstitial lung disease: a retrospective cohort study

Table 2 Results of univariate Cox proportional hazard model for mortality

Variable	HR	95 % CI	P value
Age, years	1.018	0.958–1.082	0.570
Sex, M/F	2.366	0.833–6.721	0.106
BMI, kg/m²	0.956	0.841–1.087	0.493
Smoking status, ever/never	2.377	0.842–6.706	0.102
SSc + MCTD diagnosis vs. others	1.186	0.333–4.223	0.792
RA diagnosis vs. others	0.530	0.192–1.465	0.221
PM/DM diagnosis vs. others	1.739	0.392–7.714	0.467
Corticosteroids and/or immunosuppressant use, yes/no	0.666	0.236–1.885	0.444
FVC, % predicted	0.998	0.972–1.025	0.889
DL_CO, % predicted	0.982	0.951–1.013	0.252
RV, % predicted	1.010	0.998–1.023	0.102
TLC, % predicted	1.005	0.979–1.033	0.699
PaO₂, mmHg	0.978	0.928–1.032	0.420
A-a gradient, mmHg	1.025	0.982–1.071	0.259
MPAP, mmHg	1.093	1.018–1.175	0.014
CI, l/min/m²	0.651	0.304–1.392	0.268
PVR, Wood units	1.005	0.998–1.011	0.189
PARI, Wood units/m²	1.003	0.999–1.008	0.156

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