Study on the Red Blood Cell Distribution Width in Connective Tissue Disease Associated with Interstitial Lung Disease

Table 3

Logistic regression analysis of CTD-ILD.

Variable	Univariate			Multivariate
	OR	95% CI		OR	95% CI
WBC (×10^9/l)	1.030	0.965–1.099	0.382
RDW (%)	1.163	1.029–1.313	0.025	1.232	1.053–1.442	0.019
PDW (%)			0.167
Hb (g/L)	1.015	1.002–1.027	0.023	1.017	1.000–1.034	0.036
Plt (×10^9/l)	0.998	0.995–1.000	0.193
ESR (mm/h)			0.593
CRP (mg/L)			0.888
Alb (g/L)			0.846
ALT (U/L)			0.277
AST (U/L)	1.004	1–1.009	0.065
BUN (mmol/L)			0.585
Cr (μmol/L)			0.274
RFn (IU/ml)			0.839
IgA (g/L)	1.171	0.981–1.398	0.080
IgG (g/L)	1.065	1.024–1.109	0.042	1.103	1.051–1.159	<0.001
IgM (g/L)			0.952
IgE (IU/ml)			0.99
C3 (g/L)	2.349	1.064–5.186	0.045	1.680	0.669–4.212	0.570
C4 (g/L)	8.986	0.975–82.826	0.073
PASP (mmHg)	1.062	1.002–1.104	0.022			0.058
LVEF (%)	1.036	0.997–1.077	0.078
Age, years	1.018	1.002–1.035	0.035	1.032	1.010–1.054	0.044
Sex (male)	2.004	1.008–3.690	0.036	2.104	0.915–4.837	0.180

PDW: platelet distribution width; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; ALT: alanine aminotransferase; AST: aspartate aminotransferase; BUN: blood urea nitrogen; Cr: creatinine; RF: rheumatoid factor; IgA: immunoglobulin A; IgM: immunoglobulin M; IgE: immunoglobulin E; C4: complement 4.