Table 1 Description of the participants.
Students | School staff | Overall | ||
|---|---|---|---|---|
(N = 1307) | (N = 210) | p-value | (N = 1517) | |
Age (years) | ||||
Mean (SD) [Min, Max] | 11 (4.0) [0, 18] | 47 (9.8) [22, 65] | < 0.001 | 18 (15) [0, 65] |
Missing | 370 (28.3%) | 3 (1.4%) | 373 (24.6%) | |
Sex | N (%) | N (%) | N (%) | N (%) |
|---|---|---|---|---|
Female | 628 (48.3%) | 179 (85.2%) | < 0.001 | 807 (53.5%) |
Male | 671 (51.7%) | 31 (14.8%) | 702 (46.5%) | |
High-risk contact | ||||
None | 606 (62.9%) | 130 (64.0%) | 0.060 | 736 (63.1%) |
Inside the school only | 180 (18.7%) | 43 (21.2%) | 223 (19.1%) | |
Outside school only | 54 (5.6%) | 9 (4.4%) | 63 (5.4%) | |
Both | 124 (12.9%) | 21 (10.3%) | 145 (12.4%) | |
Previous RT-PCR tests and diagnosis | ||||
Never tested | 512 (52.4%) | 60 (28.6%) | < 0.001 | 572 (48.2%) |
Tested, not diagnosed | 381 (39.0%) | 115 (54.8%) | 496 (41.8%) | |
Tested, diagnosed | 84 (8.6%) | 35 (16.7%) | 119 (10.0%) | |
IgM | ||||
Non-reactive | 1221 (93.4%) | 179 (85.2%) | < 0.001 | 1400 (92.3%) |
Reactive | 86 (6.6%) | 31 (14.8%) | 117 (7.7%) | |
IgG | ||||
Non-reactive | 1032 (79.0%) | 172 (81.9%) | 0.330 | 1204 (79.4%) |
Reactive | 275 (21.0%) | 38 (18.1%) | 313 (20.6%) | |
IgM or IgG | ||||
Non-reactive | 1022 (78.2%) | 160 (76.2%) | 0.520 | 1182 (77.9%) |
Reactive | 285 (21.8%) | 50 (23.8%) | 335 (22.1%) | |
