Table 2.
Characteristics on admission.
| Overall (n = 674) |
CCS (n = 112) |
No-CCS (n = 562) |
p | |
| Symptoms, n (%) | ||||
| Fever | 545 (80.9) | 68 (60.7) | 477 (84.9) | <0.001 |
| Cough | 500 (74.2) | 64 (57.1) | 436 (77.6) | <0.001 |
| Shortness of breath | 307 (45.5) | 58 (51.8) | 249 (44.3) | 0.147 |
| Sore throat | 149 (22.1) | 11 (9.8) | 138 (24.6) | <0.001 |
| Myalgia | 96 (14.2) | 12 (10.7) | 84 (14.9) | 0.242 |
| Laboratory findings, median [IQR] | ||||
| WBC (109/L) | 5.91 [4.55–8.15] | 6.7 [4.98–10.2] | 5.8 [4.41–7.85] | <0.001 |
| Neutrophils (103/μL) | 4.1 [2.89–6.18] | 5 [3.4–7.49] | 4.01 [2.81–6] | <0.001 |
| Lymphocytes (103/μL) | 1 [0.70–1.42] | 0.8 [0.6–1.21] | 1.05 [0.74–1.46] | <0.001 |
| Monocytes (103/μL) | 0.43 [0.3–0.63] | 0.49 [0.3–0.7] | 0.42 [0.29–0.62] | 0.056 |
| Hb (g/dl) | 13.8 [12.8–14.8] | 13 [11.5–14.1] | 13.9 [13–14.9] | <0.001 |
| Platelets (109/L) | 195 [154–259] | 197 [148–282] | 195 [154–255] | 0.809 |
| Creatinine (mg/dl) | 0.93 [0.78–1.13] | 1.1 [0.9–1.6] | 0.9 [0.76–1.1] | <0.001 |
| Sodium (mmol/L) | 138 [136–140] | 139 [135–141] | 138 [136–140] | 0.09 |
| Potassium (mmol/L) | 3.9 [3.6–4.2] | 3.9 [3.6–4.3] | 3.8 [3.5–4-2] | 0.04 |
| CK (U/L) | 101 [60–187] | 98.5 [48–237] | 101 [61–181] | 0.698 |
| LDH (U/L) | 311 [239–411] | 355 [286–490] | 304 [235–389] | <0.001 |
| ALT (U/L) | 29 [19–48] | 29 [19–54] | 29 [20–47] | 0.817 |
| CRP (mg/L) | 25.4 [6.7–92.5] | 15.9 [7.5–50] | 30 [6.5–100] | 0.075 |
| Chest radiograph severity scoring system (Taylor et. al), median [IQR] | 2 [2–3] | 3 [2–4] | 2 [2–3] | <0.001 |
| Symptom onset to admission (days), median [IQR] | 7 [3–10] | 7 [3–10] | 7 [3–10] | 0.98 |
| Vital status | ||||
| Heart rate (bpm), median [IQR] | 88 [75–100] | 78 [70–90] | 88 [78–100] | <0.001 |
| Respiratory rate (rpm), median [IQR] | 20 [20–22] | 20 [18–20] | 20 [20–23] | <0.001 |
| SBP (mmHg), mean ± sd | 130 ± 20 | 133 ± 22 | 130 ± 18 | 0.133 |
| DBP (mmHg), mean ± sd | 77 ± 12 | 76 ± 14 | 78 ± 12 | 0.097 |
| MBP (mmHg), mean ± sd | 96 ± 19 | 101 ± 37 | 95 ± 13 | 0.002 |
| Arterial blood gas analysis | ||||
| SaO2 (%), mean ± sd | 95 ± 1 | 93 ± 1 | 95 ± 1 | <0.001 |
| pH, mean ± sd | 7.45 ± 0.05 | 7.45 ± 0.05 | 7.46 ± 0.05 | 0.434 |
| PaO2 (mmHg), median [IQR] | 77 [65–90] | 77 [62–89] | 77 [65–91] | 0.453 |
| PaCO2 (mmHg), median [IQR] | 34 [31–37] | 33 [31–36] | 34 [31–37] | 0.573 |
| PaO2/FiO2, median [IQR] | 329 [248–395] | 248 [136–342] | 333 [266–395] | <0.001 |
Abbreviations: ALT: alanine aminotransferase; CCS: chronic coronary syndromes; CK: creatine kinase; CRP: C-reactive protein; DBP: diastolic blood pressure; FiO2: fraction of inspired oxygen; Hb: hemoglobin; IQR: interquartile range; LDH: lactate dehydrogenase; MBP: mean blood pressures; NA: not available; PaCO2: partial pressure of carbon dioxide in arterial blood; PaO2: partial pressure of oxygen in arterial blood; s.d.: standard deviation; SaO2: oxygen saturation; SBP: systolic blood pressure; WBC: white blood cells. Bold text indicates a statistically significant difference with a p-value <0.05.