Results of antibody tests at two trusts according to risk factors
| Risk factor | No COVID-19 sickness absence | COVID-19 sickness absence | Ratio of proportions with at least one positive test* | ||||||
| At least one test performed | At least one test positive | At least one test performed | At least one test positive | ||||||
| N | (%)† | N | (%)‡ | N | (%)† | N | (%) | ||
| All employees | 9502 | 54.8 | 1053 | 11.1 | 1548 | 64.6 | 573 | 37.0 | 3.3 |
| Staff group at 9 March 2020 | |||||||||
| Administrative and clerical | 2120 | 49.6 | 205 | 9.7 | 198 | 55.8 | 72 | 36.4 | 3.8 |
| Additional clinical services | 981 | 51.6 | 126 | 12.8 | 175 | 57.8 | 66 | 37.7 | 2.9 |
| Additional professional scientific and technical | 479 | 66.3 | 45 | 9.4 | 51 | 68.0 | 13 | 25.5 | 2.7 |
| Allied health professionals | 725 | 63.3 | 73 | 10.1 | 137 | 76.5 | 44 | 32.1 | 3.2 |
| Estates and ancillary | 537 | 46.2 | 135 | 25.1 | 112 | 57.4 | 58 | 51.8 | 2.1 |
| Healthcare scientists | 357 | 55.9 | 18 | 5.0 | 32 | 66.7 | 11 | 34.4 | 6.8 |
| Medical and dental | 1076 | 54.4 | 78 | 7.2 | 129 | 55.6 | 44 | 34.1 | 4.7 |
| Nursing and midwifery registered | 3202 | 58.5 | 370 | 11.6 | 712 | 70.7 | 265 | 37.2 | 3.2 |
| Students | 7 | 87.5 | 3 | 42.9 | 0 | 0 | 0 | 0 | 0 |
| Multiple or unknown | 18 | 72.0 | 0 | 0 | 2 | 100 | 0 | 0 | – |
Antibody test results, prior to 7 August 2020, were provided by Cambridge University Hospitals NHS Foundation Trust and Guys and St Thomas’s Trust.
*Proportion among those with COVID-19 sickness absence/proportion among those with no COVID-19 sickness absence.
†Prevalence % of having at least one test.
‡Prevalence % among those tested.