Table 3

Prevalence of SARS-CoV-2 infection according to the use of protective equipment

Number of participantsCrude prevalence % (95% CI)Adjusted prevalence* % (95% CI)Prevalence ratio (95% CI)
Overall23 7623.4 (3.2 to 3.7)3.4 (3.2 to 3.6)
Mask
 Never/rarely46284.8 (4.2 to 5.5)4.6 (4.0 to 5.2)Ref
 Often/always17 1083.1 (2.8 to 3.3)3.1 (2.9 to 3.4)0.68 (0.58 to 0.79)
Disinfectant products
 Never/rarely29973.9 (3.3 to 4.7)4.4 (3.6 to 5.2)Ref
 Often/always18 9463.4 (3.1 to 3.6)3.3 (3.1 to 3.6)0.75 (0.61 to 0.91)
Gloves
 Never/rarely79683.5 (3.1 to 3.9)4.1 (3.7 to 4.6)Ref
 Often/always13 8323.4 (3.1 to 3.7)3.1 (2.8 to 3.4)0.75 (0.64 to 0.87)
Disposable gowns
 Never/rarely20 5353.4 (3.2 to 3.7)3.5 (3.2 to 3.7)Ref
 Often/always9663.4 (2.4 to 4.8)2.9 (1.9 to 3.9)0.83 (0.58 to 1.20)
Face shield
 Never/rarely20 3173.5 (3.2 to 3.7)3.5 (3.2 to 3.7)Ref
 Often/always14133.6 (2.8 to 4.7)3.3 (2.3 to 4.3)0.95 (0.69 to 1.29)
Goggles
 Never/rarely19 0123.5 (3.2 to 3.7)3.5 (3.3 to 3.8)Ref
 Often/always27973.5 (2.9 to 4.2)3.0 (2.4 to 3.7)0.86 (0.68 to 1.09)
Protection suit
 Never/rarely20 4073.4 (3.2 to 3.7)3.5 (3.2 to 3.7)Ref
 Often/always13833.9 (3.0 to 5.1)3.1 (2.1 to 4.1)0.90 (0.65 to 1.25)
  • *Adjusted by age, gender, occupation, epidemiological week, and laboratory.