Table 1. Baseline characteristics of the patients with COPD.
| Variables | Anemic COPD | Non-anemic COPD | P value |
|---|---|---|---|
| Total number | 29 | 378 | |
| Age (years) | 73.1±6.9 | 66.5±7.4 | <0.001 |
| Gender (male) (%) | 96.6 (28/29) | 84.4 (368/378) | 0.561 |
| Smoker (pack-years) | 39.3±19.6 | 47.1±26.7 | 0.125 |
| BMI (kg/m2) | 21.4±2.9 | 23.1±3.2 | 0.005 |
| SGRQ | 31.8±15.8 | 32.9±17.9 | 0.757 |
| mMRC | 1.63±1.33 | 1.66±1.06 | 0.900 |
| Charson index | 1.41±0.98 | 1.17±0.55 | 0.196 |
| Serum laboratory finding | |||
| Leukocyte (×103/μL) | 6.6±1.7 | 7.3±2.0 | 0.067 |
| hs-CRP (mg/dL) | 0.31±0.36 | 0.40±1.04 | 0.710 |
| Hemoglobin (g/dL) | 12.2±0.7 | 15.0±1.1 | <0.001 |
| Platelet (×103/μL) | 259.9±80.8 | 238.6±62.3 | 0.090 |
| Protein (g/dL) | 6.96±0.51 | 7.11±0.50 | 0.131 |
| Albumin (g/dL) | 3.94±0.41 | 4.27±0.30 | <0.001 |
| Cholesterol (mg/dL) | 164.8±30.2 | 188.6±36.4 | 0.001 |
| Creatinine (mg/dL) | 1.04±0.31 | 1.04±0.18 | 0.934 |
Data are represented means ± standard. COPD, chronic obstructive pulmonary disease; BMI, body mass index; hs-CRP, high-sensitivity C-reactive protein; mMRC, modified Medical Research Council Dyspnea Scale; SGRQ, St. George Respiratory Questionnaire.