Research Article
Study on the Red Blood Cell Distribution Width in Connective Tissue Disease Associated with Interstitial Lung Disease
Table 1
Baseline characteristics of all patients with CTD-ILD.
| | Variable | CTD without ILD (N = 202) | CTD with ILD (N = 180) | |
| | Age, years (mean ± SD) | 49.93 ± 13.76 | 52.91 ± 11.58 | 0.024 | | Sex, M/F | 19/183 | 31/149 | 0.024 | | Hypertension | 23 | 31 | 0.102 | | Diabetes mellitus | 7 | 7 | 0.826 | | Heart disease | 9 | 15 | 0.119 | | RDW (%) | 14.17 ± 1.63 | 14.65 ± 2.08 | 0.012 | | WBC (×109/l) | 5.94 ± 2.94 | 6.22 ± 3.29 | 0.382 | | Alb (g/L) | 35.24 ± 5.68 | 35.35 ± 5.39 | 0.847 | | LVEF (%) | 64.78 ± 9.76 | 66.51 ± 4.80 | 0.049 | | HB (g/L) | 108.28 ± 15.44 | 112.17 ± 17.38 | 0.022 | | Hospital confinement (days) | 11.84 ± 5.40 | 12.60 ± 5.00 | 0.152 | | SOD (U/ml) | 114.63 ± 21.05 | 116.65 ± 20.39 | 0.369 | | PASP (mmHg) | 26.80 ± 5.91 | 30.92 ± 11.12 | 0.001 | | IgG (g/L) | 14.30 ± 5.28 | 16.13 ± 5.44 | 0.002 | | C3 (g/L) | 0.87 ± 0.30 | 0.94 ± 0.27 | 0.034 | | Hospitalisation expenses (RMB) | 7271.39 ± 4955.46 | 9062.32 ± 6129.01 | 0.002 | | Number of readmissions in one year | 1.21 ± 0.51 | 1.36 ± 0.90 | 0.038 | | Smoking status, ever/never | 9/193 | 8/172 | 0.99 |
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N: number; CTD: connective tissue diseases; ILD: interstitial lung disease; age is presented as median ± SD; RDW: red cell distribution width; WBC, white blood cell; ALB: albumin; LVEF: left ventricular ejection fraction; Hb: hemoglobin; SOD: superoxide dismutase; PASP: pulmonary artery systolic pressure; IgG: immunoglobulin G; C3: complement 3.
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