Volume 26, Number 11—November 2020
Research
Analysis of SARS-CoV-2 Transmission in Different Settings, Brunei
Liling Chaw
, Wee Chian Koh, Sirajul Adli Jamaludin, Lin Naing, Mohammad Fathi Alikhan, and Justin Wong
, Wee Chian Koh, Sirajul Adli Jamaludin, Lin Naing, Mohammad Fathi Alikhan, and Justin Wong
Table 2
Risk factors for severe acute respiratory syndrome coronavirus 2 infection among close contacts, Brunei*
| Characteristics | Total, n = 1,755 | Positive, n = 51 | Attack rate, % (95% CI) | Crude risk ratio (95% CI)† | Adjusted risk ratio (95% CI)‡ |
|---|---|---|---|---|---|
| Sex | |||||
| M | 913 | 24 | 2.6 (1.7–3.9) | Referent | Referent |
| F | 842 | 27 | 3.2 (2.2–4.7) | 1.22 (0.71–2.11) | 1.23 (0.69–2.27) |
| Age group | |||||
| 0–9 | 267 | 4 | 1.5 (0.4–3.8)§ | Referent | Referent |
| 10–19 | 163 | 8 | 4.9 (2.3–9.8) | 3.28 (1.05–12.12) | 1.92 (0.63–7.03) |
| 20–29 | 364 | 13 | 3.6 (2.0–6.2) | 2.38 (0.85–8.39) | 1.91 (0.70–6.61) |
| 30–39 | 441 | 6 | 1.4 (0.6–3.1) | 0.91 (0.26–3.53) | 0.85 (0.24–3.38) |
| 40–49 | 255 | 9 | 3.5 (1.7–6.8) | 2.36 (0.78–8.61) | 1.95 (0.63–7.32) |
| 50–59 | 174 | 8 | 4.6 (2.2–9.2) | 3.07 (0.98–11.36) | 1.84 (0.58–7.05) |
| ≥60 | 83 | 3 | 3.6 (0.8–10.2)§ | 2.41 (0.48–10.74) | 1.00 (0.20–4.51) |
| Types of close contact | |||||
| Social | 445 | 4 | 0.9 (0.2–2.3)§ | Referent | Referent |
| Relatives | 144 | 5 | 3.5 (1.3–8.3) | 3.86 (1.04, 15.43) | 4.13 (1.10–16.51) |
| Local religious gathering | 54 | 8 | 14.8 (7.1–27.7) | 16.48 (5.38–60.13) | 15.60 (4.81–59.87) |
| Workplace or school | 848 | 6 | 0.7 (0.3–1.6) | 0.79 (0.23–3.07) | 0.79 (0.23–3.10) |
| Household | |||||
| Child | 85 | 12 | 14.1 (7.8–23.8) | 15.71 (5.62–55.16) | 14.09 (4.79–51.54) |
| Spouse | 31 | 13 | 41.9 (24.1–60.7) | 46.65 (17.77–158.39) | 45.20 (16.76–156.12) |
| Others¶ | 148 | 3 | 2.0 (0.4–5.8)§ | 2.26 (0.45–10.2) | 2.23 (0.44–10.0) |
*Bold text indicates statistically significant value. †Calculated by using simple log-binomial regression. ‡Calculated by using multiple log-binomial regression (sex, p = 0.485; age group, p = 0.339; types of close contact, p<0.001). §For counts <5, calculated by using binomial 95% CI. ¶Others include siblings, parents, housekeepers, or relatives, such as grandparents and grandchildren.
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