Table 1 Comparisons between patients with positive and negative IgG antibody
From: Detection of IgG antibody during the follow-up in patients with COVID-19 infection
Variables | Positive IgG (n = 397) | Negative IgG (n = 87) | Negative IgG (≥ 2 tests) (n = 37) | p |
|---|---|---|---|---|
Age (years) | 51.2 ± 13.9 | 49.6 ± 17.2 | 51.8 ± 19.4 | 0.365 |
Gender (male, %) | 190 (47.8) | 43 (49.4) | 13 (35.1) | 0.791 |
White blood cell count on admission | 5.3 ± 1.8 | 7.1 ± 3.1 | 6.9 ± 2.7 | < 0.001 |
Lymphocyte count on admission | 1.3 ± 0.0 | 1.6 ± 0.1 | 1.6 ± 0.7 | 0.001 |
Neutrophil count on admission | 3.5 ± 1.6 | 5.0 ± 3.0 | 4.7 ± 2.5 | < 0.001 |
White blood cell count at follow-up | 6.3 ± 1.7 | 6.5 ± 1.8 | 6.2 ± 1.8 | 0.387 |
Lymphocyte count at follow-up | 2.1 ± 0.6 | 2.1 ± 0.6 | 2.0 ± 0.7 | 0.738 |
Neutrophil count at follow-up | 3.7 ± 1.4 | 3.9 ± 1.4 | 3.6 ± 1.3 | 0.296 |
Maximum duration of IgG test | 50.5 ± 14.8 | 43.3 ± 15.0 | 50.6 ± 12.1 | < 0.001 |
Maximum duration of IgG test*, median (min and max value) | 51 (10–100) | 42 (2–90) | 50 (28–90) | < 0.001 |
Abnormal CT findings at follow-up# (which indicate residual infection) | 259/372 | 22/64 | 10/32 | < 0.001 |