(a).
| Characteristics n (%) | Quartiles of 25(OH)D | P value | |||
|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | ||
| 25(OH)D (nmol/L)* | 28.8 ± 5.6 | 43.2 ± 3.9 | 55.6 ± 3.4 | 76.1 ± 12.3 | <0.001 |
| 25(OH)D (ng/mL)* | 11.5 ± 2.2 | 17.3 ± 1.6 | 22.2 ± 1.4 | 30.4 ± 4.9 | <0.001 |
| Age, years* | 75.5 ± 14.3 | 75.8 ± 12.9 | 75.0 ± 12.1 | 70.9 ± 12.8 | 0.058 |
| Smoking status, n (%) | 0.384 | ||||
| Current smoker, n (%) | 18 (21.7) | 14 (16.7) | 10 (11.9) | 17 (20.2) | |
| Past smoker, n (%) | 13 (15.7) | 21 (25.0) | 17 (20.2) | 21 (25.0) | |
| Never smoked, n (%) | 52 (62.7) | 49 (58.3) | 57 (67.9) | 46 (54.8) | |
| Angina pectoris, n (%) | 44 (53.0) | 45 (53.6) | 39 (46.3) | 39 (46.4) | 0.663 |
| CHF, n (%) | |||||
| Killip class 2–4 | 43 (51.8) | 26 (31.0) | 20 (23.8) | 17 (20.2) | <0.001 |
| History of previous MI, n (%) | 30 (36.1) | 25 (29.8) | 25 (29.8) | 22 (26.2) | 0.567 |
| CABG, n (%) | 6 (7.2) | 3 (3.6) | 8 (9.5) | 3 (3.6) | 0.279 |
| PCI, n (%) | 1 (1.2) | 2 (2.4) | 7 (8.3) | 8 (9.5) | 0.035 |
| Hypertension, n (%) | 41 (49.4) | 39 (46.4) | 40 (47.6) | 37 (44.4) | 0.917 |
| History of DM 1, n (%) | 1 (1.2) | 1 (1.2) | 0 (0.0) | 1 (1.2) | 0.798 |
| History of DM 2, n (%) | 11 (13.3) | 12 (14.3) | 13 (15.5) | 9 (10.7) | 0.828 |
| STEMI, n (%) | 11 (13.3) | 7 (8.3) | 3 (3.6) | 7 (8.3) | 0.164 |
| TnT release, n (%) | 46 (55.4) | 40 (47.6) | 42 (50.0) | 34 (40.5) | 0.277 |
| eGFR (μmol L−1)* | 52.3 ± 18.4 | 54.9 ± 17.4 | 53.9 ± 17.8 | 58.9 ± 15.1 | 0.079 |
| Cholesterol/statin, n (%) | 43 (51.8) | 46 (54.8) | 45 (53.6) | 45 (53.6) | 0.985 |
| Beta-blocker, n (%) | 33 (39.8) | 32 (38.1) | 38 (45.2) | 23 (27.4) | 0.112 |
| Known CHD, n (%) | 59 (71.1) | 56 (66.7) | 56 (66.7) | 50 (59.5) | 0.465 |
| BMI (kg/m2)* | 25.4 ± 4.8 | 25.5 ± 4.6 | 25.2 ± 5.2 | 24.9 ± 4.0 | 0.886 |
| BNP quartiles | 0.094 | ||||
| Q1 | 17 (20.7) | 20 (25.0) | 17 (21.5) | 27 (33.8) | |
| Q2 | 19 (23.2) | 23 (28.8) | 20 (25.3) | 19 (23.8) | |
| Q3 | 15 (18.3) | 21 (26.3) | 23 (29.1) | 21 (26.3) | |
| Q4 | 31 (37.8) | 16 (20.0) | 19 (24.1) | 13 (16.3) | |
| hsCRP quartiles | 0.995 | ||||
| Q1 | 20 (24.1) | 19 (22.6) | 21 (25.0) | 24 (28.6) | |
| Q2 | 21 (25.3) | 20 (23.8) | 22 (26.2) | 20 (23.8) | |
| Q3 | 21 (25.3) | 22 (26.2) | 19 (22.6) | 22 (26.2) | |
| Q4 | 21 (25.3) | 23 (27.4) | 22 (26.2) | 18 (21.4) | |
*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.