TABLE 2.
Laboratory findings of patients infected with the Omicron variant or Delta variant on admission to the hospital.
| Omicron variant (n = 384) |
Delta variant (n = 103) |
P | |
| White blood cell count, × 109 per L | 4.91 (4.06–6.22) | 4.98 (4.00–6.21) | 0.935 |
| < 4 | 87 (23%) | 25 (24%) | 0.729 |
| 4–10 | 293 (76%) | 76 (74%) | ⋅⋅ |
| > 10 | 4 (1%) | 2 (2%) | ⋅⋅ |
| Neutrophil count, × 109 per L | 2.43 (1.82–4.33) | 2.72 (2.05–3.91) | 0.011 |
| Lymphocyte count, × 109 per L | 1.89 (1.49–2.41) | 1.54 (1.23–2.10) | 0 |
| < 1.0 | 20 (5%) | 15 (15%) | 0.001 |
| Eosinophil count, × 109 per L | 0.08 (0.04–0.15) | 0.08 (0.03–0.14) | 0.244 |
| Platelet count, × 109 per L | 205 (173–241.5) | 164 (119–204) | 0 |
| > 300 | 18 (5%) | 4 (4%) | 0.935 |
| Hemoglobin, g/L | 143 (131–159) | 128 (119–146) | 0 |
| Prothrombin time, s | 11.7 (10.9–12.5) | 11.8 (11.4–12.4) | 0.071 |
| Activated partial thromboplastin time, s | 30.9 (28.7–32.9) | 33.2 (28.9–37.3) | 0 |
| > 37 | 15 (4%) | 22 (21%) | 0 |
| D-dimer, mg/L | 0.04 (0.02–0.09) | 0.33 (0.19–0.60) | 0 |
| ≥ 1.0 | 2 (0.5%) | 10 (10%) | 0 |
| Alanine aminotransferase, U/L | 17 (12–26) | 17 (12–29) | 0.699 |
| > 40 | 39 (10%) | 26 (25%) | 0.472 |
| Aspartate aminotransferase, U/L | 19 (15–24) | 23 (17–30) | 0 |
| > 40 | 17 (4%) | 12 (12%) | 0.006 |
| Albumin, g/L | 43 (41.1–45.1) | 42.68 (40.16–45.60) | 0.203 |
| A/G | 1.6 (1.4–1.9) | 1.7 (1.4–1.9) | 0.186 |
| < 1.5 | 123 (32%) | 26 (25%) | 0.184 |
| Total Bilirubin, μmol/L | 11.2 (8.48–15.03) | 8.5 (6.0–12.4) | 0 |
| Total cholesterol, mmol/L | 4.58 (3.99–5.21) | 3.86 (3.45–4.25) | 0 |
| ≥ 5.72 | 52 (14%) | 1 (1%) | 0 |
| Triglyceride, mmol/L | 0.83 (0.64–1.19) | 1.14 (0.91–1.60) | 0 |
| > 2.26 | 11 (3%) | 4 (4%) | 0.833 |
| High-density lipoprotein, mmol/L | 1.48 (1.26–1.72) | 1.05 (0.91–1.23) | 0 |
| < 0.91 | 4 (1%) | 23 (22%) | 0 |
| Low-density lipoprotein, mmol/L | 2.64 (2.31–3.11) | 1.93 (1.64–2.29) | 0 |
| ≥ 3.64 | 36 (9%) | 1 (1%) | 0.004 |
| Creatinine, μmol/L | 69 (62–78) | 59.5 (49–71.5) | 0 |
| ≥ 133 | 58 (15%) | 2 (2%) | 0.044 |
| Creatinine kinase, U/L | 86 (63–116) | 61.5 (38.7–91.7) | 0 |
| Blood urea nitrogen, μmol/L | 3.4 (3.2–4.9) | 4.44 (3.82–5.21) | 0.012 |
| Lactate dehydrogenase, U/L | 158 (140–180) | 200 (173–243) | 0 |
| ≥ 250 | 8 (2%) | 25 (24%) | 0 |
| Specific gravity | ⋅⋅ | ||
| ≥ 1.030 | 115 (30%) | NA | ⋅⋅ |
| Erythrocyte sedimentation rate, mm/h | 13 (8–20) | ⋅⋅ | |
| > 20 | 81 (21%) | NA | ⋅⋅ |
| Complement 3 | 0.73 (0.61–0.88) (n = 225) | NA | ⋅⋅ |
| < 0.7 | 93 (41%) | NA | ⋅⋅ |
| Complement 4 | 0.31 (0.25–0.44) (n = 225) | NA | ⋅⋅ |
| C-reactive protein, mg/L | 1.57 (0.14–4.20) | 3.9 (1.5–18.5) | 0 |
| > 10 | 28 (7%) | 36 (35%) | 0 |
| Procalcitonin, ng/mL | |||
| < 0.1 | 314 (82%) | 95 (92%) | 0.01 |
| Pneumonia | 116 (30%) | 63 (61%) | 0 |
| Bilateral involvement of chest radiographs | 51 (13%) | 66 (50%) | 0 |
Percentages do not total 100% owing to missing data.
Data are median (IQR), n (%), or n/N (%), where N is the total number of patients with available data.
P comparing Omicron variant and Delta variant are from χ2, Fisher’s exact test, or Mann–Whitney U test.