Table 3.
Risk of infection of SARS-CoV-2 among cases and controls from the Lisbon and Tagus Valley Region in September and October 2020.
| Variable | Crude odds ratio (95% CI) | P-value | Adjusted odds ratio (95% CI)a | P-value |
|---|---|---|---|---|
| No. of people per room (area ≥ 4 m2) | ||||
| Reference: <1 | (n = 1,867) | (n = 1,840) | ||
| ≥1 | 2.23 (1.77–2.83) | <0.001 | 1.47 (1.14–1.91) | 0.004 |
| Occupation/professional situation | ||||
| Reference: Education | (n = 1,867) | (n = 1,840) | ||
| Construction | 3.97 (1.65–10.73) | 0.003 | 1.11 (0.42–3.17) | 0.842 |
| Cleaning | 2.56 (1.21–5.64) | 0.016 | 0.89 (0.39–2.08) | 0.782 |
| Restaurant industry | 2.51 (1.17–5.68) | 0.022 | 0.93 (0.41–2.19) | 0.860 |
| Healthcare | 2.14 (1.17–3.96) | 0.014 | 1.87 (0.98–3.58) | 0.058 |
| Industry | 2.43 (0.96–6.75) | 0.070 | 0.88 (0.33–2.58) | 0.808 |
| Senior care | 12.75 (3.53–82.08) | <0.001 | 4.99 (1.30–33.08) | 0.041 |
| Other occupation | 0.90 (0.56–1.43) | 0.660 | 0.66 (0.40–1.09) | 0.109 |
| Student | 1.92 (1.00–3.74) | 0.053 | 0.44 (0.21–0.93) | 0.030 |
| Retired | 0.46 (0.27–0.75) | 0.002 | 0.54 (0.29–1.00) | 0.049 |
| Unemployed | 1.70 (0.96–3.01) | 0.068 | 0.80 (0.43–1.49) | 0.484 |
| Another professional situation | 1.73 (0.88–3.45) | 0.115 | 0.91 (0.43–1.95) | 0.815 |
| Remote working | ||||
| Reference: No (working in-office) | (n = 1,408) | (n = 1,386) | ||
| Unemployed | 1.05 (0.73–1.54) | 0.799 | 0.75 (0.50–1.14) | 0.170 |
| Yes | 0.22 (0.16–0.30) | <0.001 | 0.30 (0.22–0.42) | <0.001 |
| Used public transportation | ||||
| Reference: No | (n = 1,871) | (n = 1,844) | ||
| At least once | 1.43 (1.13–1.82) | 0.003 | 0.98 (0.75–1.29) | 0.897 |
| Went to restaurants and other dining spaces | ||||
| Reference: No | (n = 1,866) | (n = 1,839) | ||
| At least once | 0.65 (0.54–0.78) | <0.001 | 0.73 (0.59–0.91) | 0.005 |
| Went to grocery stores | ||||
| Reference: No | (n = 1,867) | (n = 1,840) | ||
| At least once | 0.45 (0.35–0.56) | <0.001 | 0.44 (0.34–0.57) | <0.001 |
| Went to shopping malls/shops | ||||
| Reference: No | (n = 1,869) | (n = 1,842) | ||
| At least once | 0.56 (0.45–0.68) | <0.001 | 0.51 (0.40–0.64) | <0.001 |
| Went to hair salons/aesthetic centers | ||||
| Reference: No | (n = 1,869) | (n = 1,842) | ||
| At least once | 0.50 (0.40–0.64) | <0.001 | 0.51 (0.39–0.66) | <0.001 |
| Went to gyms/sports studios | ||||
| Reference: No | (n = 1,868) | (n = 1,841) | ||
| At least once | 0.96 (0.68–1.36) | 0.804 | 1.04 (0.71–1.55) | 0.832 |
a
Adjusted for sex, age, education level, and citizenship. 95% CI, 95% Confidence Interval.