Table 1.
Baseline characteristics according to the presence or absence of vitamin D deficiency.
| Variable | All patients | Normal | Vitamin D-deficient | p value |
|---|---|---|---|---|
| N = 186 | N = 117 | N = 69 | ||
| Age (years) | 59 ± 14 | 59 ± 12 | 59 ± 13 | 0.98 |
| Male sex (%) | 84 (45%) | 54 (46%) | 30 (44%) | 0.72 |
| Smoking (%) | 29 (16%) | 20 (18%) | 9 (13%) | 0.44 |
| DM (%) | 70 (38%) | 38 (33%) | 32 (48%) | 0.04* |
| CAD (%) | 33 (18%) | 22 (19%) | 11 (16%) | 0.67 |
| CHF (%) | 39 (21%) | 25 (22%) | 14 (21%) | 0.92 |
| PAD (%) | 22 (12%) | 15 (13%) | 7 (10%) | 0.62 |
| COPD (%) | 14 (8%) | 8 (7%) | 6 (9%) | 0.61 |
| Peptic ulcer disease (%) | 64 (34%) | 39 (34%) | 25 (37%) | 0.61 |
| Stroke (%) | 19 (10%) | 7 (6%) | 12 (18%) | 0.01* |
| Cancer (%) | 15 (8%) | 11 (10%) | 4 (6%) | 0.40 |
| Dialysis duration (years) | 7 ± 25 | 9 ± 31 | 4 ± 4 | 0.26 |
| Body mass index (kg/m2) | 23 ± 4 | 23 ± 4 | 23 ± 4 | 0.84 |
| nPCR (g·kg−1·day−1) | 1.2 ± 0.3 | 1.2 ± 0.3 | 1.1 ± 0.3 | 0.08 |
| Cardiothoracic ratio (%) | 50 ± 7 | 49 ± 6 | 52 ± 7 | 0.01* |
Notes: Values are expressed as the mean ± SD or total number (percent).
*p value < 0.05.
Statistical significance based on Chi-square test for categorical variables or t-test for continuous variables.
Abbreviations: DM, diabetes mellitus; CAD, coronary artery disease; CHF, congestive heart failure; PAD, peripheral arterial occlusive disease; COPD, chronic obstructive pulmonary disease; nPCR, normalized protein catabolic rate.