Hypochromic red cells as a prognostic indicator of survival among patients with systemic sclerosis screened for pulmonary hypertension

Table 2 Predictors of survival in the uni- and multivariable analysis

Variables	Univariable analysis		Multivariable Cox regression analysis
Variables	p-value	n	p-value	n
Hypochromic erythrocytes	0.043	170
White blood cell count	0.298	170
Ferritin	0.353	160
Iron	0.702	160
Hemoglobin	0.290	170
MCH	0.301	170
MCV	0.143	170
Categorial^a
MCV ≤ 80 fl	0.920	163
Hypochromic erythrocytes > 2%	0.018	163	0.031	145
Known prognostic predictors
Sex	0.322	163
Type of SSc	0.679	163
DLCO ≤ 65% predicted	< 0.001	149	0.013	145
ILD presence	0.066	163
Age ≥ 60 years, baseline	0.040	160
PVR ≥ 2 WU	0.041	161

MCV mean corpuscular volume, SSc systemic sclerosis, DLCO diffusion capacity of the lung for carbon monoxide, ILD interstitial lung disease, PVR pulmonary vascular resistance
^aUnivariable categorical analyses were performed with Kaplan-Meier analysis, and all other analyses were Cox regression analyses

ISSN: 1478-6362