Participant characteristics at baseline
| Average age (IQR), years | 40.7 (32–48) |
| Gender, % (n) | |
| Male | 30.93 (146) |
| Female | 69.07 (326) |
| Relationship status, % (n)* | |
| Married | 55.08 (260) |
| In a committed relationship | 19.92 (94) |
| Single | 18.22 (86) |
| Divorced/separated | 6.14 (29) |
| Widowed | 0.64 (3) |
| Place of employment, % (n) | |
| Hospital site A | 58.26 (275) |
| Hospital site B | 41.74 (197) |
| Occupation, % (n)† | |
| Doctor | 19.28 (91) |
| Nurse | 29.03 (137) |
| Clerical or administrative staff | 13.77 (65) |
| Catering | 1.48 (7) |
| Pharmacy | 2.54 (12) |
| Security | 4.87 (23) |
| Portering | 1.27 (6) |
| Domestic | 2.54 (12) |
| Laboratory | 4.45 (21) |
| Maintenance | 2.12 (10) |
| Healthcare assistant | 4.66 (22) |
| Allied healthcare | 10.38 (49) |
| Management | 0.64 (3) |
| Audiologist | 0.42 (2) |
| Radiographer | 2.54 (12) |
| Interaction with COVID-19 patients, % (n) | |
| Yes | 57.63 (272) |
| No | 42.37 (200) |
| Underlying medical conditions, % (n) | |
| None | 63.77 (301) |
| Hypertension | 13.13 (62) |
| Dyslipidaemia | 5.30 (25) |
| Elevated body mass index | 4.87 (23) |
| Diabetes | 1.91 (9) |
| Obstructive airway disease | 7.63 (36) |
| Heart disease | 0.63 (3) |
| Smoking | 10.81 (51) |
| Other | 4.45 (21) |
*For comparative analysis, participants either ‘married’ or ‘in a committed relationship’ was classified as having relationship support, whilst ‘single’, ‘divorced/separated’ and ‘widowed’ were classified as without relationship support.
†Occupations were further grouped into medical (doctors and nurses) and non-medical (all others).