TABLE 1.
Characteristics of the participants in total and divided by serostatus
| Characteristic | n (%) (N = 866) | ELISA seropositive [n (%)] (N = 845) | ELISA seronegative [n (%)] (N = 21) |
|---|---|---|---|
| Age | |||
| <40 | 380 (44) | 369 (44) | 11 (52) |
| 40–60 | 385 (44) | 376 (45) | 9 (43) |
| >60 | 101 (12) | 100 (12) | 1 (4.8) |
| Sex | |||
| Female | 666 (77) | 647 (77) | 19 (90.5) |
| Male | 200 (23) | 198 (23) | 2 (9.5) |
| BMI | |||
| <25 | 423 (49) | 415 (49) | 8 (38) |
| 25–30 | 241 (28) | 234 (28) | 7 (33) |
| 30 | 109 (13) | 103 (12) | 6 (29) |
| No information | 93 (11) | 93 (11) | 0 (0) |
| Smoking | |||
| Yes | 96 (11) | 95 (11) | 1 (4.8) |
| No | 754 (87) | 734 (87) | 20 (95.2) |
| No information | 16 (1.9) | 16 (1.9) | 0 (0) |
| Reported having contact with patients | |||
| Yes | 810 (93.5) | 790 (93.5) | 20 (95.2) |
| No | 55 (6.4) | 54 (6.4) | 1 (4.8) |
| No information | 1 (0.1) | 1 (0.1) | 0 (0) |
| Severity of the disease | |||
| No clinical symptom or clinically symptomatic but quite well at home | 253 (29) | 238 (28) | 15 (71) |
| Clinically symptomatic and bedridden at home or at hospital | 540 (62) | 534 (63) | 6 (29) |
| No information | 73 (8.4) | 73 (8.6) | 0 (0) |
| Median time since PCR (days) | 131 | 136 | 80 |