Association of Red Blood Cell Distribution Width Levels with Connective Tissue Disease-Associated Interstitial Lung Disease (CTD-ILD)

Table 1

Baseline clinical features of all subjects.

Variable	CTD without ILD ()	CTD-ILD ()	value
Gender (female, no. (%))	83 (85.6)	143 (67.1)	0.001
Smoking history (Y, %)	2 (2.1)	33 (15.5)	0.001
Age (years)			<0.001
sPAP (mmHg)	()	()	0.826
ESR (mm/h)	()		<0.001
CPR (mg/L)	4.85 (2.80, 10.73) ()	4.50 (2.80, 8.80)	0.346
WBC count (10^9/l)			0.001
RDW (%)			<0.001
Hb (g/l)			0.813
MCV (fL)			0.020
LDH (U/L)			0.242
TBil (umol/l)	()		0.907
DBil (umol/l)	1.80 (1.15, 2.80) ()	2.20 (1.70, 3.00)	0.800
CEA (ng/ml)			0.113
CYFRA21-1 (ng/ml)			0.131
NSE (ng/ml)			0.772

sPAP: systolic pulmonary arterial pressure; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; WBC: white blood cell; RDW: red blood cell distribution width; Hb: hemoglobin; MCV: mean corpuscular volume; LDH: lactate dehydrogenase; TBil: total bilirubin; DBil: direct bilirubin; NSE: neuron-specific enolase; CYFRA21-1: cytokeratin 21-1; CEA: carcinoembryonic antigen.