Table 2.
Incidences of immunoglobulin G (IgG) and/or immunoglobulin M (IgM) seroconversion by the time of hospital closure
| IgG+, IgM+ | IgG+, IgM− | IgG−, IgM+ | IgG−, IgM− | P‐value | |
|---|---|---|---|---|---|
| Asymptomatic (N = 26) | 8 (31%) | 14 (54%) | 0 (0%) | 4 (15%) | 0.0002 |
| Symptomatic (N = 188) | 138 (73%) | 39 (21%) | 1 (1%) | 10 (5%) | |
| Age ≤ 60 (N = 168) | 114 (68%) | 39 (23%) | 1 (1%) | 14 (8%) | 0.18 |
| Age > 60 (N = 46) | 32 (70%) | 14 (30%) | 0 (0%) | 0 (0%) | |
| Male (N = 86) | 60 (70%) | 21 (24%) | 0 (0%) | 5 (6%) | 0.84 |
| Female (N = 128) | 86 (67%) | 32 (25%) | 1 (1%) | 9 (7%) |
+: IgG or IgM ≥ 10 AU mL−1; −: IgG or IgM < 10 AU mL−1.