(b).
| Characteristics n (%) | Quartiles of 25(OH)D | P value | |||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | ||
| 25(OH)D (nmol/L)* | 31.7 ± 6.0 | 46.3 ± 3.0 | 57.4 ± 3.8 | 79.9 ± 13.7 | <0.001 |
| 25(OH)D (ng/mL)* | 12.7 ± 2.4 | 18.5 ± 1.2 | 23.0 ± 1.5 | 32.0 ± 5.5 | <0.001 |
| Age, years* | 63.6 ± 15.3 | 66.0 ± 16.3 | 67.8 ± 12.9 | 68.6 ± 12.3 | 0.024 |
| Smoking status, n (%) | 0.211 | ||||
| Current smoker, n (%) | 53 (40.5) | 44 (33.6) | 37 (28.0) | 34 (26.0) | |
| Past smoker, n (%) | 53 (40.5) | 58 (44.3) | 67 (50.8) | 63 (48.1) | |
| Never smoked, n (%) | 25 (19.1) | 29 (22.1) | 28 (21.2) | 34 (26.0) | |
| Angina pectoris, n (%) | 46 (35.1) | 48 (36.6) | 60 (45.5) | 54 (41.2) | 0.306 |
| CHF, n (%) | |||||
| Killip Class 2–4 | 42 (32.1) | 21 (16.0) | 32 (24.2) | 31 (23.7) | 0.026 |
| History of previous MI, n (%) | 50 (38.2) | 46 (35.1) | 45 (34.1) | 44 (33.6) | 0.867 |
| CABG, n (%) | 18 (13.7) | 14 (10.7) | 16 (12.1) | 19 (14.5) | 0.795 |
| PCI, n (%) | 19 (14.5) | 17 (13.0) | 18 (13.6) | 15 (11.5) | 0.903 |
| Hypertension, n (%) | 44 (33.6) | 45 (34.4) | 56 (42.4) | 59 (45.0) | 0.141 |
| History of DM 1, n (%) | 1 (0.8) | 1 (0.8) | 1 (0.8) | 2 (1.5) | 0.894 |
| History of DM 2, n (%) | 25 (19.1) | 14 (10.7) | 19 (14.4) | 8 (6.1) | 0.013 |
| STEMI, n (%) | 21 (16.0) | 28 (21.4) | 28 (21.2) | 23 (17.6) | 0.610 |
| TnT release, n (%) | 73 (55.7) | 74 (56.5) | 76 (57.6) | 81 (61.8) | 0.754 |
| eGFR (μmol L−1)* | 70.5 ± 21.7 | 67.0 ± 21.0 | 68.1 ± 20.6 | 65.8 ± 21.7 | 0.312 |
| Cholesterol/statin, n (%) | 57 (43.5) | 62 (47.3) | 65 (49.2) | 61 (46.6) | 0.826 |
| Beta-blocker, n (%) | 49 (37.4) | 44 (33.6) | 44 (33.3) | 45 (34.4) | 0.894 |
| Known CHD, n (%) | 80 (61.1) | 77 (58.8) | 85 (64.4) | 79 (60.3) | 0.817 |
| BMI (kg/m2)* | 26.1 ± 3.9 | 26.6 ± 4.9 | 26.0 ± 3.4 | 25.0 ± 3.5 | 0.014 |
| BNP quartiles | 0.545 | ||||
| Q1 | 29 (23.4) | 35 (27.3) | 27 (21.1) | 36 (29.5) | |
| Q2 | 30 (24.2) | 30 (23.4) | 39 (30.5) | 27 (22.1) | |
| Q3 | 30 (24.2) | 27 (21.1) | 36 (28.1) | 31 (25.4) | |
| Q4 | 35 (28.2) | 36 (28.1) | 26 (20.3) | 28 (23.0) | |
| hsCRP Quartiles | 0.904 | ||||
| Q1 | 30 (22.9) | 33 (25.2) | 32 (24.2) | 36 (27.5) | |
| Q2 | 28 (21.4) | 31 (23.7) | 35 (26.5) | 36 (27.5) | |
| Q3 | 37 (28.2) | 34 (26.0) | 35 (26.5) | 27 (20.6) | |
| Q4 | 36 (27.5) | 33 (25.2) | 30 (22.7) | 32 (24.4) | |
*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.