TABLE 1.
Subject characteristics.
| Characteristics | N (119) |
| Age [N (%)] | |
| ≤60 years old | 99 (83.2) |
| >60 years old | 20 (16.8) |
| Sex [N (%)] | |
| Female | 103 (86.6) |
| Male | 16 (13.4) |
| Cancer types [N (%)] | |
| Hematologic | 9 (7.6) |
| Solid | 110 (92.4) |
| Serum 25(OH)D level, median [IQR] (ng/mL) | 36.36 [30.30] |
| Daily vitamin D3 supplementation [N (%)] | |
| Yes | 84 (70,59) |
| No | 35 (29,41) |
| Anti-SARS-CoV-2 antibody level (AU/mL) | |
| S-RBD IgG, median [IQR] | 270.56 [658.01] |
| NAb, median [IQR] | 129.03 [225.61] |
| Seropositivity [N (%)] | |
| S-RBD IgG | 111 (93.3%) |
| NAb | 112 (94.1%) |
IQR, interquartile range; SD, standard deviation; COVID-19, coronavirus disease 2019; S-RBD IgG, antibodies against receptor binding domain of SARS-CoV-2 spike protein; NAb, neutralizing antibody.