Table 1.
Baseline characteristics of patients.
| Variable | hsTnT not available (n = 1087) | hsTnT negative (n = 323) | Chronically elevated hsTnT (n = 232) | Acutely elevated hsTnT (n = 62) | P value |
|---|---|---|---|---|---|
| Age mean (SD) | 62.7 (21.1) | 66.4 (18.5) | 79.7 (12.1) | 78.3 (13.7) | <0.001 |
| Age group n (%) | |||||
| < 40 | 214 (84.9) | 35 (13.9) | 1(0.4) | 2 (0.8) | <0.001 |
| 40–59 | 202 (69.9) | 67 (23.2) | 17 (5.9) | 3 (1.0) | |
| 60–79 | 384 (63.3) | 133 (21.9) | 69 (11.4) | 21 (3.4) | |
| > 80 | 287 (51.6) | 88 (15.8) | 145 (26.1) | 36 (6.5) | |
| Sex male n (%) | 473 (46.4) | 132 (42.7) | 125 (54.4) | 31 (50.8) | 0.050 |
| Influenza type n (%) | 0.252 | ||||
| Influenza A | 958 (88.1) | 281 (87.0) | 213 (91.8) | 57 (91.9) | |
| Influenza B | 129 (11.9) | 42 (13.0) | 19 (8.2) | 5 (8.1) | |
| CCI mean (SD) | 1.1 (1.5) | 0.9 (1.3) | 2.2 (2.1) | 2.9 (1.8) | <0.001 |
| Smoking history n (%) | 481 (44.3) | 162 (50.2) | 124 (53.5) | 30 (48.4) | 0.057 |
| IHD n (%) | 155 (14.3) | 49 (15.2) | 74 (31.9) | 24 (38.7) | <0.001 |
| Diabetes n (%) | 237 (21.8) | 63 (19.5) | 86 (37.1)) | 26 (41.9) | <0.001 |
| COPD n (%) | 241 (22.2) | 82 (25.4) | 94 (40.5) | 23 (37.1) | <0.001 |
| Asthma n (%) | 79 (7.3) | 31 (9.6) | 7 (3.0) | 0 | 0.003 |
| ILD n (%) | 13 (1.2) | 0 | 5 (2.1) | 2 (3.2) | 0.047 |
| CKD n (%) | 8 (0.7) | 2 (0.6) | 5 (2.1) | 3 (4.8) | 0.005 |
| Malignancy n (%) | 124 (11.4) | 33 (10.2) | 32 (13.8) | 10 (16.1) | 0.401 |
| Immunosuppressed n (%) | 6 (0.5) | 1 (0.3) | 2 (0.8) | 1 (1.6) | 0.600 |
| hsTnT mean (SD) (ng/L) | 135.2 (621.2)) | 170.5 (265.1) | <0.001 | ||
| EF mean (SD) | 52.4 (13.2) | 48.8(11.2) | 0.354 | ||
| Creatinine mean (SD) (μmol/L) | 106.4 (111.4) | 82.7 (31.5) | 143.2 (143.9) | 149.3 (126.3) | <0.001 |
| CRP mean (SD) (mg/L) | 55.7 (67.5) | 59.5 (76.4) | 68.0 (73.5) | 65.8 (65.5) | 0.032 |
hsTnT, (high sensitive troponin); SD, (standard deviation); CCI, (charlson comorbidity index); IHD, (ischaemic heart disease); COPD, (chronic obstructive lung disease), ILD, (interstitial lung disease), CKD, (chronic kidney disease); EF, (ejection fraction).