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[Preprint]. 2021 Aug 21:2021.08.19.21262111. [Version 1] doi: 10.1101/2021.08.19.21262111

Table 2b.

Serology results of convalescent patients by 30 days intervals since second first positive PCR test

Time since first positive PCR (in days) 0–29 30–59 60–89 90–119 120–149 150–179 180–209 210–239 240–269
N 269 499 341 331 700 735 587 365 161
Age (in years) 39.96 (14.78) 41.10 (14.95) 45.07 (16.53) 43.52 (16.32) 42.90 (16.23) 40.95 (16.13) 41.39 (16.14) 40.59 (15.32) 41.75 (17.42)
Sex, n (%) Female 157 (58.4 %) 326 (65.3 %) 234 (68.6 %) 219 (66.2 %) 400 (57.1 %) 461 (62.7 %) 371 (63.2 %) 230 (63.0 %) 112 (69.6 %)
Male 112 (41.6 %) 173 (34.7 %) 107 (31.4 %) 112 (33.8 %) 300 (42.9 %) 274 (37.3 %) 216 (36.8 %) 135 (37.0 %) 49 (30.4 %)
SARS-CoV-2 IgG antibody level mean (SD) 1914 (3870) 1739 (2972) 1552 (2522) 1195 (2406) 1079 (2556) 860 (1962) 904 (2384) 850 (2104) 901 (1739)
median [IQR] 490 [109–1869] 586 [212–1908] 538 [247–1723] 377 [165–1080] 329 [140–886] 312 [138–8301] 278 [125–751] 278 [105–727] 351 [124–919]