Table 3.
Comparison of daycare centre staff and the comparator group
|
Daycare centre staff |
Comparator group |
||||||
|---|---|---|---|---|---|---|---|
| Seronegative individuals (n=183) | Seropositive individuals (n=14) | Relative risk or mean difference (95% CI) | Seronegative individuals (n=155) | Seropositive individuals (n=9) | Relative risk or mean difference (95% CI) | ||
| Sex | |||||||
| Female | 181/183 (99%) | 14/14 (100%) | .. | 121/155 (78%) | 6/9 (67%) | .. | |
| Male | 2/183 (1%) | 0 | 0 | 34/155 (22%) | 3/9 (33%) | 1·5 (0·4 to 6·4) | |
| Age, years | 41 (12) | 41 (15) | 0·0 (−8·0 to 8·0) | 43 (12) | 44 (10) | 1·0 (−5·8 to 7·8) | |
| Number of adults at home, including the study participant | 2·4 (1·2) | 2·0 (0·9) | −0·4 (−0·9 to 0·1) | 2·2 (1·0) | 2·0 (1·0) | −0·2 (−0·9 to 0·5) | |
| Number of children at home | 0·9 (1·1) | 0·8 (1·1) | −0·1 (−0·7 to 0·5) | 1·0 (1·2) | 1·4 (1·1) | 0·4 (−0·3 to 1·1) | |
| History of fever (body temperature >38°C) during lockdown* | 18/180 (10%) | 4/14 (29%) | 2·9 (0·8 to 10·2) | 7/153 (5%) | 1/9 (11%) | 2·5 (0·3 to 22·5) | |
| History of respiratory signs (dyspnoea, cough, rhinitis, otitis, or conjunctivitis) during lockdown* | 61/178 (34%) | 5/13 (39%) | 1·1 (0·3 to 3·3) | 32/144 (22%) | 4/8 (50%) | 2·2 (0·5 to 8·5) | |
| History of abdominal signs (diarrhoea, vomiting, or abdominal pain) during lockdown* | 26/177 (15%) | 5/13 (39%) | 2·5 (0·8 to 8·1) | 19/151 (13%) | 3/9 (33%) | 2·7 (0·6 to 11·8) | |
| History of other signs | 106/183 (58%) | 8/14 (57%) | 1·0 (0·3 to 3·0) | 66/155 (43%) | 8/9 (89%) | 2·1 (0·3 to 17·1) | |
| Loss of appetite | 12/183 (7%) | 5/14 (36%) | 5·4 (1·6 to 18·8) | 8/155 (5%) | 2/9 (22%) | 4·3 (0·8 to 24·2) | |
| Skin signs | 14/183 (8%) | 2/14 (14%) | 1·9 (0·4 to 9·2) | 5/155 (3%) | 0 | 0 | |
| Headache | 91/182 (50%) | 8/14 (57%) | 1·1 (0·4 to 3·4) | 45/155 (29%) | 5/9 (56%) | 1·9 (0·5 to 7·5) | |
| Asthenia | 47/182 (26%) | 7/14 (50%) | 1·9 (0·6 to 5·8) | 39/155 (25%) | 6/9 (67%) | 2·6 (0·6 to 11·1) | |
| Myalgia | 15/183 (8%) | 5/14 (36%) | 4·4 (1·3 to 14·7) | 16/155 (10%) | 4/8 (50%) | 4·3 (1·0 to 17·7) | |
| Anosmia | 2/183 (2%) | 4/14 (29%) | 13·1 (2·8 to 60·1) | 4/155 (3%) | 5/9 (56%) | 21·5 (4·1 to 111·8) | |
| Ageusia | 6/183 (3%) | 4/14 (29%) | 8·7 (2·1 to 35·9) | 3/155 (2%) | 6/9 (67%) | 34·4 (5·7 to 207·6) | |
| Chest pain | 7/183 (4%) | 2/14 (14%) | 3·7 (0·7 to 20·0) | 8/155 (5%) | 3/9 (33%) | 6·5 (1·4 to 30·7) | |
| Joint pain | 16/183 (9%) | 5/14 (36%) | 4·1 (1·2 to 13·7) | 12/155 (8%) | 3/9 (33%) | 4·3 (1·0 to 19·4) | |
| RT-PCR testing of a nasal swab during lockdown* | 36/183 (20%) | 3/14 (21%) | 1·1 (0·3 to 4·1) | 33/155 (21%) | 3/9 (33%) | 1·6 (0·4 to 6·6) | |
| Positive RT-PCR test during lockdown* | 2/36 (6%) | 1/3 (33%) | 5·5 (0·5 to 60·5) | 1/33 (3%) | 3/3 (100%) | 32·0 (1 to 945) | |
| Contact with a confirmed case of COVID-19 during lockdown* | 67/183 (37%) | 7/14 (50%) | 1·4 (0·5 to 4·1) | 60/155 (39%) | 6 (67%) | 1·7 (0·4 to 7·1) | |
| At least one child at work | 10/183 (5%) | 0 | 0 | NA | NA | 0 | |
| At least one adult at work | 41/183 (22%) | 1/14 (7%) | 0·3 (0·0 to 2·5) | 51/155 (33%) | 3/9 (33%) | 1 (0·2 to 4·2) | |
| At least one child living with the adult | 0 | 0 | .. | 2/155 (1%) | 1/9 (11%) | 8·6 (0·7 to 105·3) | |
| At least one other adult living with the adult | 1/183 (1%) | 1/14 (7%) | 13·1 (0·8 to 221·1) | 2/155 (1%) | 2/9 (22%) | 17·2 (2·1 to 140·8) | |
| Partner's occupation | |||||||
| Health-care worker in a dedicated COVID-19 unit | 0 | 0 | NA | 1/109 (1%) | 0 | 0 | |
| Health-care worker in a non-COVID-19 unit | 3/122 (3%) | 0 | 0 | 10/109 (9%) | 0 | 0 | |
| Other occupation | 119/122 (97%) | 8/8 (100%) | 1·1 (0·4 to 2·8) | 98/109 (90%) | 7/7 (100%) | 1·1 (0·1 to 20·8) | |
Data are n/N (%), or mean (SD), unless otherwise indicated. Missing data for seronegative individuals (daycare centre staff): number of adults at home (n=2) and number of children at home (n=2). NA=not applicable.
*
Between March 15 and May 9, 2020.