Table 1.
SARS-CoV-2 IgG seroprevalence of HCWs and support staff according to sociodemographic characteristics. Both unweighted and inverse probability weighted data are presented. The p values were calculated using unweighted data. Abbreviations: +ve – positive; % – proportion; BAME – Black, Asian and Minority Ethnic; IMD – Indices of Multiple Deprivation.
| Variable | Serology +ve | Total | p value for unweighted data | Weighted seroprevalence % (estimated) |
|
| n | % | ||||
| Sex | 0.9 | ||||
| Female | 498 | 9.3% | 5338 | 9.4% | |
| Male | 140 | 9.2% | 1520 | 8.6% | |
| Ethnicity | <0.001 | ||||
| BAME | 160 | 14.6% | 1095 | 15.7% | |
| Undisclosed | 22 | 11.9% | 185 | 9.1% | |
| White | 456 | 8.2% | 5578 | 7.9% | |
| Ageb | <0.001 | ||||
| <=20 years | 14 | 12.3% | 114 | 13.9% | |
| 21–30 | 192 | 10.9% | 1757 | 11.1% | |
| 31–40 | 118 | 7.3% | 1624 | 6.8% | |
| 41–50 | 158 | 10.3% | 1536 | 9.8% | |
| 51–60 | 120 | 8.5% | 1408 | 9.2% | |
| 61–70 | 35 | 8.7% | 402 | 8.0% | |
| Assignment | <0.001 | ||||
| Bank | 67 | 14.2% | 472 | 13.7% | |
| Fixed term temporary | 75 | 10.1% | 740 | 7.8% | |
| Permanent | 496 | 8.8% | 5644 | 9.1% | |
| Staff group | <0.001 | ||||
| Additional clinical services | 180 | 12.7% | 1420 | 12.2% | |
| Estates and ancillary | 63 | 12.2% | 516 | 11.6% | |
| Nursing and midwifery | 201 | 10.2% | 1962 | 10.5% | |
| Medical and dental | 74 | 8.6% | 856 | 7.9% | |
| Allied health professionals | 31 | 7.5% | 413 | 7.8% | |
| Administrative and clerical | 73 | 5.9% | 1233 | 6.1% | |
| Additional scientific and technical | 11 | 5.2% | 211 | 6.3% | |
| Healthcare scientists | 4 | 1.6% | 245 | 1.9% | |
| Division | <0.001 | ||||
| Medicine | 242 | 18.3% | 1322 | 17.2% | |
| Clinical governance | 8 | 15.7% | 51 | 6.4% | |
| Bank staff | 67 | 14.2% | 472 | 13.6% | |
| Neurosciences and musculoskeletal | 71 | 8.8% | 811 | 8.5% | |
| Facilities | 43 | 8.6% | 499 | 9.4% | |
| Anaesthesia, surgery, critical, renal | 87 | 6.1% | 1418 | 5.9% | |
| Core clinical services | 73 | 6.0% | 1224 | 6.0% | |
| Admin Aa | 6 | 5.7% | 106 | 6.2% | |
| Admin Ba | 1 | 5.3% | 19 | 6.9% | |
| Admin Ca | 2 | 3.3% | 61 | 6.4% | |
| Admin Da | 7 | 5.0% | 139 | 5.9% | |
| Women and children's | 26 | 4.5% | 577 | 5.9% | |
| Admin Ea | 3 | 3.8% | 79 | 6.7% | |
| Admin Fa | 2 | 3.1% | 65 | 7.2% | |
| IMD decile | <0.01 | ||||
| 1 (most deprived) | 44 | 12.0% | 375 | – | |
| 2 | 73 | 11.0% | 663 | – | |
| 3 | 55 | 11.0% | 480 | – | |
| 4 | 56 | 9.1% | 617 | – | |
| 5 | 48 | 7.6% | 628 | – | |
| 6 | 46 | 9.4% | 488 | – | |
| 7 | 62 | 8.3% | 745 | – | |
| 8 | 66 | 9.2% | 717 | – | |
| 9 | 57 | 8.2% | 694 | – | |
| 10 (least deprived) | 98 | 8.4% | 1160 | – | |
| Total | 638 | 9.3% | 6858 | – | |
a
Administrative groups de-identified to preserve anonymity. These groups share a common exposure risk – they are office-based and do not routinely have contact with clinical areas.
b
The percentages do not total 100% as we removed one row to preserve anonymity.