Showing laboratory parameters and chest X-ray findings
| Variables | First wave Mean±SD (median, IQR) | Second wave Mean±SD (median, IQR) | P value |
| White blood cells (103/µL) | 6.49±2.41 (6.10, 4.80–7.60) | 6.27±2.21 (5.90, 4.70–7.40) | 0.031* |
| Haemoglobin (g/dL) | 14.35±1.37 (14.40, 13.50–15.22) | 14.16±1.43 (14.20, 13.3–15.2) | 0.003* |
| Platelet count (103/µL) | 234.99±89.44 (217, 175–269) | 225.55±82.50 (209, 168–259) | 0.014* |
| Albumin (g/L) | 36.97±4.83 (37, 34–40) | 35.58±4.94 (35, 32–39) | <0.001* |
| C reactive protein (mg/L) | 50.54±53.28 (35.35, 12.90–72.02) | 33.68±44.20 (15.2, 15.20–32.20) | <0.001† |
| Lactate | 1.74±0.77 (1.60, 1.20–2.10) | 1.73±0.91 (1.50, 1.20–2.10) | 0.924* |
| Procalcitonin | 0.41±1.62 (0.11, 0.06–0.21) | 0.30±1.15 (0.11, 0.06–0.21) | 0.456† |
| D-dimer | 1.20±4.28 (0.44, 0.32–0.68) | 1.10±3.84 (0.42, 0.30–0.63) | 0.139† |
| Aspartate aminotransferase | 44.14±34.47 (35, 26–50) | 46.81±40.14 (37, 28–52) | 0.020† |
| Alkaline phosphatase | 77.56±31.71 (71, 59–87.5) | 78.29±34.96 (71, 58–87) | 0.626* |
| Alanine aminotransferase | 42.74±33.28 (32.9, 23–50.55) | 44.30±34.24 (34, 24–54) | 0.267† |
| Total bilurubin | 9.97±5.73 (8.30, 7–12) | 9.57±6.20 (8.0, 6.0–11.0) | 0.143* |
| HbA1c | 7.37±2.04 (6.60, 5.90–8.40) | 6.94±1.83 (6.20, 5.80–7.3) | <0.001* |
| Chest X-ray findings | |||
| Unilateral infiltrations | 185 (17.8) | 236 (23.8) | 0.001‡ |
| Bilateral infiltrations | 854 (82.2) | 755 (76.2) |
In all statistical comparative analysis performed, second wave was considered as a reference group.
*Unpaired t test.
†Mann-Whitney U test
‡Pearson χ2 test.