Descriptive statistics of study sample by PCR tested for SARS-CoV-2 and PCR test positive for SARS-CoV-2 between 1 March 2020 and 31 August 2021
| Tested for SARS-CoV-2 % (n) | Not tested for SARS-CoV-2 % (n) | Tested positive for SARS-CoV-2 % (n) | Tested negative/not tested (unknown) for SARS-CoV-2 % (n) | |
| Sample | 39.1 (2764) | 60.9 (4298) | 8.1 (569) | 91.9 (6493) |
| Age at time of HAPPEN survey | 10.1±0.8 | 9.9±0.9 | 10.1±0.8 | 9.9±0.8 |
| Age on 1 March 2020 (start of period of interest) | 10.6±0.9 | 10.3±1.1 | 10.6±1.0 | 10.4±1.0 |
| Number of days between HAPPEN survey and SARS-CoV-2 test (median (IQR)) | 588 (385–685) | 672 (599–715) | ||
| Sex | ||||
| Boy | 49.3 (1363) | 46.7 (2005) | 44.3 (252) | 48.0 (3116) |
| Girl | 48.9 (1352) | 51.8 (2226) | 54.5 (310) | 50.3 (3268) |
| Missing | 1.8 (49) | 1.5 (67) | 1.2 (7) | 1.7 (109) |
| WIMD 2019 quintiles | ||||
| 1 (most deprived) | 24.3 (672) | 23.9 (1,025) | 28.5 (162) | 23.6 (1535) |
| 2 | 19.9 (551) | 19.02 (826) | 19.7 (112) | 19.5 (1265) |
| 3 | 16.5 (455) | 17.4 (748) | 17.6 (100) | 17.0 (1103) |
| 4 | 15.6 (431) | 15.8 (678) | 14.1 (80) | 15.9 (1029) |
| 5 (least deprived) | 18.0 (497) | 16.8 (771) | 16.5 (94) | 17.3 (1124) |
| Missing | 5.7 (158) | 7.0 (300) | 3.7 (21) | 6.7 (437) |
See online supplemental appendix 4 for variable codebook. Full descriptive statistics table is presented in online supplemental appendix 5.
HAPPEN, Health and Attainment of Pupils in a Primary Education Network; WIMD, Welsh Index of Multiple Deprivation.