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. 2021 Nov 4;9:772782. doi: 10.3389/fpubh.2021.772782

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.