Prognostic value of cardiopulmonary exercise testing in patients with systemic sclerosis

BMC Pulmonary Medicine

Table 4 Two different models for the calculation of predictive variables for survival

Mortality	Hazard ratio	p-value	95% Confidence interval	Harrell’s C	N
Model 1				0.96	148
Age	1.163	0.000	1070; 1264
KCO	0.947	0.003	0.915; 0.981
PeakVO₂ (ml/kg/min)	0.653	0.000	0.529; 0.806
FVC	0.942	0.000	0.913; 0.973
Model 2				0.95	150
Age	1.272	0.000	1.143; 1.416
VE/VCO₂-slope	0.900	0.018	0.825; 0.982
KCO	0.918	0.008	0.862; 0.978
FVC	0.909	0.000	0.863; 0.957
PeakVO₂ (% pred.)	0.869	0.000	0.807; 0.937

FVC Forced vital capacity, KCO Krogh factor (DLCO per alveolar volume), peakVO₂ peak oxygen uptake, pred. predicted, VE/VCO₂-slope slope of the relationship between ventilation and carbon dioxide output

ISSN: 1471-2466