Variable | No. of serocoverted/ No. of exposed | Univariable analysis | Multivariable analysis | ||||
OR | 95% CI | P value | aOR | 95% CI | P value | ||
Age (for each 1 year more) | 1 | 0.97–1.04 | 0.817 | 0.99 | 0.95–1.03 | 0.683 | |
Sex | |||||||
Female | 18/452 | 1 | 1 | ||||
Male | 5/153 | 0.87 | 0.33–2.30 | 0.779 | 0.79 | 0.26–2.42 | 0.687 |
Professional status | |||||||
Nurse | 6/214 | 1 | 1 | ||||
Doctor | 8/194 | 1.46 | 0.51–4.15 | 0.475 | 1.4 | 0.44–4.50 | 0.566 |
Healthcare service worker | 1/63 | 0.77 | 0.13–4.70 | 0.777 | 1.86 | 0.29–11.77 | 0.512 |
Health service assistant | 4/76 | 1.99 | 0.58–6.90 | 0.275 | 2.28 | 0.62–8.42 | 0.217 |
Socioadministrative staff | 4/58 | 2.65 | 0.76–9.20 | 0.125 | 3.17 | 0.58–17.27 | 0.183 |
Contacts with infected relatives | |||||||
No | 13/538 | 1 | 1 | ||||
Yes | 10/67 | 7.08 | 2.97–16.90 | <0.0001 | 8.12 | 2.95–22.34 | <0.0001 |
Contact with patients with COVID-19 (previous 30 days) | |||||||
No | 9/204 | 1 | 1 | ||||
Yes | 14/401 | 0.78 | 0.33–1.84 | 0.577 | 1.19 | 0.37–3.79 | 0.772 |
Symptoms (previous 30 days) | |||||||
No | 6/497 | 1 | 1 | ||||
Yes | 17/108 | 15.3 | 5.87–39.81 | <0.0001 | 15.13 | 5.97–38.37 | <0.0001 |
Trained in use of PPE | |||||||
No | 7/136 | 1 | 1 | ||||
Yes | 16/469 | 0.65 | 0.26–1.62 | 0.355 | 0.73 | 0.25–2.13 | 0.562 |
Confidence with PPE | |||||||
Low/medium | 5/171 | 1 | 1 | ||||
High/very high | 18/434 | 1.44 | 0.52–3.93 | 0.481 | 0.96 | 0.31–2.98 | 0.942 |
Age, sex, professional status, contacts with infected relatives, contact with COVID-19 patients in the past 30 days, suggestive symptoms over the past 30 days, training in the use of PPE and reported confidence with PPE were included in the multivariable model as covariates.
aOR, adjusted OR; PPE, personal protective equipment.