Table 1.
Baseline characteristics of the total population arranged according to the quartiles of 25(OH)D.
| Characteristics n (%) | Quartiles of 25(OH)D | P value | |||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | ||
| 25(OH)D (nmol/L)* | 30.5 ± 5.9 | 45.2 ± 3.4 | 56.7 ± 3.6 | 78.6 ± 13.2 | <0.001 |
| 25(OH)D (ng/mL)* | 12.2 ± 2.4 | 18.1 ± 1.4 | 22.7 ± 1.4 | 31.4 ± 5.3 | <0.001 |
| Age, years* | 68.9 ± 16.1 | 69.4 ± 15.6 | 70.7 ± 13.2 | 69.3 ± 12.4 | 0.591 |
| Male, n (%) | 120 (55.8) | 138 (64.2) | 127 (58.8) | 140 (65.1) | 0.150 |
| Smoking status, n (%) | 0.110 | ||||
| Current smoker, n (%) | 71 (33.0) | 58 (27.0) | 46 (21.3) | 52 (24.2) | |
| Past smoker, n (%) | 65 (30.2) | 78 (36.3) | 83 (38.4) | 87 (40.5) | |
| Never smoked, n (%) | 79 (36.7) | 79 (36.7) | 87 (40.3) | 76 (35.3) | |
| Angina pectoris, n (%) | 93 (43.3) | 90 (41.9) | 100 (46.3) | 93 (43.3) | 0.820 |
| CHF, n (%) | |||||
| Killip Class 2–4 | 84 (39.1) | 48 (22.3) | 52 (24.1) | 48 (22.3) | <0.001 |
| History of previous MI, n (%) | 82 (38.1) | 69 (32.1) | 71 (32.9) | 66 (30.7) | 0.382 |
| CABG, n (%) | 22 (10.2) | 17 (7.9) | 26 (12.0) | 22 (10.2) | 0.564 |
| PCI, n (%) | 18 (8.4) | 21 (9.8) | 25 (11.6) | 23 (10.7) | 0.721 |
| Hypertension, n (%) | 87 (40.5) | 86 (40.0) | 96 (44.4) | 93 (43.3) | 0.746 |
| History of DM 1, n (%) | 2 (0.9) | 2 (0.9) | 0 (0.0) | 4 (1.9) | 0.256 |
| History of DM 2, n (%) | 38 (17.7) | 24 (11.2) | 34 (15.7) | 15 (7.0) | 0.004 |
| STEMI, n (%) | 30 (14.0) | 35 (16.3) | 31 (14.4) | 32 (14.9) | 0.913 |
| TnT release, n (%) | 117 (54.4) | 115 (53.5) | 120 (55.6) | 115 (53.5) | 0.969 |
| eGFR (μmol L−1)* | 63.5 ± 22.1 | 61.7 ± 20.8 | 62.9 ± 20.2 | 63.0 ± 20.3 | 0.834 |
| Cholesterol/Statin, n (%) | 104 (48.4) | 105 (48.8) | 109 (50.5) | 107 (49.8) | 0.973 |
| Beta-blocker, n (%) | 81 (37.7) | 78 (36.3) | 77 (35.6) | 73 (34.0) | 0.881 |
| Known CHD, n (%) | 140 (65.1) | 132 (61.4) | 142 (65.7) | 129 (60.0) | 0.537 |
| BMI (kg/m2)* | 25.7 ± 4.4 | 26.3 ± 4.7 | 25.7 ± 4.2 | 25.0 ± 3.7 | 0.024 |
| BNP quartiles | 0.222 | ||||
| Q1 | 47 (22.8) | 52 (24.8) | 44 (21.4) | 64 (31.7) | |
| Q2 | 50 (24.3) | 50 (23.8) | 60 (29.1) | 44 (21.8) | |
| Q3 | 48 (23.3) | 53 (25.2) | 54 (26.2) | 53 (26.2) | |
| Q4 | 61 (29.6) | 55 (26.2) | 48 (23.3) | 41 (20.3) | |
| hsCRP quartiles | 0.910 | ||||
| Q1 | 51 (23.7) | 52 (24.2) | 53 (24.5) | 61 (28.4) | |
| Q2 | 49 (22.8) | 50 (23.3) | 56 (25.9) | 57 (26.5) | |
| Q3 | 57 (26.5) | 57 (26.5) | 53 (24.5) | 50 (23.3) | |
| Q4 | 58 (27.0) | 56 (26.0) | 54 (25.0) | 47 (21.9) | |
*Mean ± SD.
SD, standard deviation; 25(OH)D, 25-hydroxyvitamin D; CHF, congestive heart failure; MI, myocardial infarction; CABG, coronary artery bypass grafting; PCI, percutaneous coronary intervention; DM, diabetes mellitus; STEMI, ST-elevation myocardial infarction; TnT, troponin T; eGFR, estimated glomerular filtration rate; CHD, coronary heart disease; BMI, body mass index; BNP, B-type natriuretic peptide; hsCRP, high sensitivity C-reactive protein.