Table 1.
Characteristics of staff and students in the participating schools (June to mid-July, 2020)
| Students (n=6727) | Staff (n=4628) | Unknown (n=611) | Total (n=11 966) | ||
|---|---|---|---|---|---|
| Sex | |||||
| Female | 3374/6653 (50·7%) | 3902/4600 (84·8%) | 2 | 7278/11 255 (64·7%) | |
| Male | 3279/6653 (49·3%) | 698/4600 (15·2%) | 0 | 3977/11 255 (35·3%) | |
| Missing sex | 74 | 28 | 609 | 711 | |
| Ethnicity | |||||
| White | 4016/5389 (74·5%) | 3403/4019 (84·7%) | 1 | 7420/9409 (78·9%) | |
| Mixed or multiple ethnic groups | 415/5389 (7·7%) | 94/4019 (2·3%) | 0 | 509/9409 (5·4%) | |
| Black or Black British | 217/5389 (4·0%) | 128/4019 (3·2%) | 0 | 345/9409 (3·7%) | |
| Asian or Asian British | 576/5389 (10·7%) | 344/4019 (8·6%) | 0 | 920/9409 (9·8%) | |
| Other ethnic group | 165/5389 (3·1%) | 50/4019 (1·2%) | 0 | 215/9409 (2·3%) | |
| Missing ethnicity | 1338 | 609 | 610 | 2557 | |
| Study group | |||||
| Weekly swabbing only (86 schools) | 5911 (87·9%) | 3247 (70·2%) | 611 | 9769 (81·6%) | |
| Participant numbers in swabs schools | 61 (33–102) | 36 (23–48) | 4 (2–8) | 93 (61–156) | |
| Swabs per person in swab schools | 4 (3–5) | 4 (4–5) | 3 (2–4) | 4 (3–5) | |
| Blood sampling (45 schools) | 816 (12·1%) | 1381 (29·8%) | 0 | 2197 (18·4%) | |
| Participant numbers in blood schools | 13 (8–36) | 28 (17–36) | .. | 43 (28–68) | |
| Swabs per person in blood schools | 2 (1–2) | 2 (1–2) | 1 (1–1) | 2 (1–2) | |
| Total numbers of swabs taken | 23 339 | 15 288 | 1874 | 40 501 | |
| Swabs per school | 127 (30–306) | 93 (55–163) | 8 (4–21) | 227 (103–467) | |
| Age, years | |||||
| 4–6 | 2515/5949 (42·3%) | NA | 0 | .. | |
| 7–9 | 1377/5949 (23·1%) | NA | 0 | .. | |
| 10–12 | 2057/5949 (34·6%) | NA | 0 | .. | |
| 20–29 | NA | 68/489 (13·9%) | 0 | .. | |
| 30–39 | NA | 139/489 (28·4%) | 0 | .. | |
| 40–49 | NA | 121/489 (24·7%) | 0 | .. | |
| 50–59 | NA | 125/489 (25·6%) | 0 | .. | |
| ≥60 | NA | 36/489 (7·4%) | 0 | .. | |
| Missing | 778 | 4139 | 0 | 4917 | |
| Region in England | |||||
| East Midlands | 1194 (17·7%) | 611 (13·2%) | 52 | 1857 (15·5%) | |
| East of England | 259 (3·9%) | 141 (3·0%) | 29 | 429 (3·6%) | |
| London | 950 (14·1%) | 1280 (27·7%) | 73 | 2303 (19·2%) | |
| North East | 583 (8·7%) | 282 (6·1%) | 79 | 944 (7·9%) | |
| North West | 405 (6·0%) | 375 (8·1%) | 1 | 781 (6·5%) | |
| South East | 513 (7·6%) | 298 (6·4%) | 40 | 851 (7·1%) | |
| South West | 523 (7·8%) | 332 (7·2%) | 39 | 894 (7·5%) | |
| West Midlands | 1985 (29·5%) | 1152 (24·9%) | 19 | 3156 (26·4%) | |
| Yorkshire and the Humber | 315 (4·7%) | 157 (3·4%) | 279 | 751 (6·3%) | |
Data are n (%), n, or median (IQR). Percentages might not sum to 100% due to rounding. NA=not applicable.