Table 1.
Participant’s characteristics at inclusion and COVID-19 history
| Characteristics | F-NLR Rugby players, n = 779 | Student athletes4, n = 171 |
|---|---|---|
| Sex, male, n (%) | 779 (100.0) | 85 (49.7) |
| Age (years), mean (SD) | 25.8 (4.6) | 20.1 (3.1) |
| BMI (Kg/m2), median (Q1; Q3) | 29.0 (27.1; 31.9) | 22.3 (20.7; 23.7) |
| BMI > 30, n (%) | 310 (39.8) | 5 (2.9) |
| Ethnicity, n (%) | ||
| Afro-Caribbean | 47 (6.0) | 6 (3.5) |
| Caucasian | 623 (80.0) | 164 (95.9) |
| Melanesian Islands | 109 (14.0) | – |
| Missing | – | 1 (0.6) |
| Comorbidities, n (%) | ||
| Tobacco use | 62 (8.4) | 6 (3.5) |
| High blood pressure | 2 (0.3) | 0 (0.0) |
| Diabetes | 0 (0.0) | 1 (0.6) |
| Asthma | 47 (6.1) | 23 (13.5) |
| No comorbidity | 675 (86.7) | 142 (83.0) |
| Acute SARS-CoV-2 infection symptoms, n (%) | ||
| At least one symptom1 | 181 (23.7) | 101 (59.1) |
| 1 symptom | 90 (11.8) | 14 (8.2) |
| 2 or 3 symptoms | 59 (7.7) | 36 (21.0) |
| > 3 symptoms | 32 (4.2) | 51 (29.9) |
| No symptoms | 580 (76.3) | 70 (40.9) |
| Specific symptom: Ageusia/Anosmia | 24 (3.2) | 22 (12.9) |
| COVID(+) at inclusion (COVID(+)prevalent)2, n (%) | 52 (6.7) | 27 (15.8) |
| Known positive RT-PCR within 3 months prior to inclusion | 15 (28.8) | 17 (63.0) |
| Positive serology | 49 (94.2) | 27 (100.0) |
| COVID(+) during follow-up (COVID(+)incident), n (%) | 206 (28.3) | NA |
| Positive RT-PCR | 192 (93.2) | NA |
| Positive serology without previous positive PCR | NA | |
| Among those with positive RT-PCR: | 6.8) | |
| Seroconversion (+ serology after + PCR) | 155 (80.7) | NA |
| No seroconversion3 | 25 (13.0) | NA |
SD: Standard deviation; BMI: body mass index
1Including anosmia/ageusia, from Day 0 questionnaire
2Prevalent cases, previous positive SARS-COV-2 RT-PCR or serology
3Only 180/192 + PCR players with available samples for serology testing after + PCR
4The student population included representation from 27 sporting disciplines, predominant among which were rugby (16%), handball (13%), judo (11%), soccer (7%) and athletics (7%)