Table 3a.
Association between risk factors and SARS-CoV-2 seropositivity, both hospitals, April 2021.
| Unadjusted relative | P-value | Adjusted relative | P-value | ||
|---|---|---|---|---|---|
| risk (95% CI) | risk (95% CI) | ||||
| Hospital | Hospital 2 | Ref. | |||
| Hospital 1 | 1.6 (1.4–1.9) | <0.001 | 1.5 (1.3–1.8) | <0.001 | |
| Age groups (years) | 18–29 | 1.4 (1.1–1.6) | 0.001 | 1.3 (1.1–1.6) | 0.002 |
| 30–39 | 1.1 (0.9–1.3) | 0.427 | 1.1 (0.9–1.3) | 0.299 | |
| 40–49 | 0.9 (0.7–1.1) | 0.209 | 1.0 (0.7–1.1) | 0.569 | |
| 50–59 | Ref. | Ref. | |||
| Over 60 | 1.0 (0.7–1.3) | 0.794 | 1.0 (0.7–1.3) | 0.948 | |
| Sex | Female | Ref. | Ref. | ||
| Male | 1.2 (1.1–1.4) | 0.007 | 1.2 (1.0–1.4) | 0.016 | |
| Ethnicity | Irish (White) | Ref. | Ref. | ||
| Any other white background | 1.3 (1.0–1.5) | 0.020 | 1.2 (1.0–1.4) | 0.120 | |
| Asian background | 1.6 (1.3–1.8) | <0.001 | 1.1 (0.9–1.3) | 0.206 | |
| African or other black background | 2.1 (1.6–2.8) | <0.001 | 1.7 (1.3–2.2) | <0.001 | |
| Other | 1.5 (1.0–2.1) | <0.001 | 1.3 (0.9–1.9) | 0.145 | |
| Country of birth | Ireland | Ref. | * | ||
| India | 1.7 (1.3–2.0) | <0.001 | |||
| Philippines | 1.6 (1.3–2.1) | <0.001 | |||
| United Kingdom | 1.0 (0.7–1.3) | 0.749 | |||
| Poland | 1.5 (1.0–2.2) | 0.040 | |||
| USA | 1.3 (0.8–2.2) | 0.364 | |||
| Romania | 2.1 (1.4–3.2) | <0.001 | |||
| Nigeria | 3.5 (2.5–4.8) | <0.001 | |||
| Other | 1.4 (1.1–1.7) | 0.002 | |||
| Education | Primary | 2.2 (1.2–4.0) | 0.014 | 1.6 (0.9–2.9) | 0.138 |
| Secondary | 1.5 (1.2–1.8) | <0.001 | 1.4 (1.1–1.8) | 0.002 | |
| Third level | 1.3 (1.2–1.5) | <0.001 | 1.1 (1.0–1.3) | 0.133 | |
| Post-graduate | Ref. | Ref. | |||
| Role | Admin | Ref. | Ref. | ||
| Doctor/Dental | 1.3 (1.0–1.7) | 0.051 | 1.0 (0.7–1.4) | 0.973 | |
| Nursing | 1.7 (1.3–2.1) | <0.001 | 1.4 (1.0–1.8) | 0.022 | |
| HCA | 2.5 (2.0–3.3) | <0.001 | 1.8 (1.3–2.3) | <0.001 | |
| General support | 1.8 (1.3–2.3) | <0.001 | 1.2 (0.9–1.7) | 0.144 | |
| Allied HCW | 0.9 (0.7–1.2) | 0.424 | 0.8 (0.6–1.1) | 0.119 | |
| Other | 0.8 (0.4–1.4) | 0.381 | 0.7 (0.3–1.2) | 0.134 | |
| Lives with | Alone | Ref. | * | ||
| With others | 1.4 (1.1–1.8) | 0.010 | |||
| Lives with HCW | No | Ref. | Ref. | ||
| Yes | 1.3 (1.2–1.5) | <0.001 | 1.2 (1.0–1.4) | 0.007 | |
| Workplace exposure to COVID-19 patients | No patient contact | Ref. | Ref. | ||
| Daily contact with patients without COVID-19 | 1.6 (1.3–1.9) | <0.001 | 1.3 (1.1–1.5) | 0.013 | |
| Daily contact with COVID-19 patients | 2.0 (1.7–2.4) | <0.001 | 1.4 (1.1–1.7) | 0.002 | |
| Previous COVID-19 like symptoms (ever) | No | Ref. | * | ||
| Yes | 5.8 (4.9–6.8) | <0.001 | |||
| Severity of symptoms | No symptoms | Ref. | * | ||
| Mild symptoms | 3.8 (3.2–4.6) | <0.001 | |||
| Significant symptoms | 10.1 (8.6–11.9) | <0.001 | |||
| Severe symptoms (hospitalization) | 11.0 (8.5–14.3) | <0.001 | |||
*
Not included in the model. Statistically significant findings in bold.