Table 1

Prevalence of SARS-CoV-2 infection among essential workers by gender, age and occupation

Number of participantsCrude prevalence
% (95% CI)
Adjusted prevalence*
% (95% CI)
Adjusted prevalence ratio
(95% CI)
Overall30 2313.2 (3.0 to 3.4)3.2 (3.0 to 3.4)
Gender
 Men20 5213.5 (3.2 to 3.7)3.3 (3.1 to 3.6)Ref
 Women97102.4 (2.1 to 2.8)2.8 (2.5 to 3.2)0.86 (0.73 to 1.01)
Age, years
 <4050202.8 (2.4 to 3.3)3.0 (2.5 to 3.5)Ref
 40–4910 5043.2 (2.8 to 3.5)3.1 (2.8 to 3.4)1.03 (0.85 to 1.25)
 50–5911 4203.3 (3.0 to 3.7)3.2 (2.9 to 3.5)1.09 (0.90 to 1.31)
 ≥6028403.2 (2.7 to 4.0)3.8 (3.0 to 4.5)1.26 (0.98 to 1.63)
Type of work
 Telecommuting10 4151.9 (1.7 to 2.2)3.3 (2.6 to 3.9)Ref
 Policemen65544.6 (4.1 to 5.1)4.4 (3.6 to 5.2)1.35 (0.97 to 1.88)
 Bus drivers53393.2 (2.7 to 3.7)4.2 (3.4 to 5.1)1.29 (1.03 to 1.61)
 Cleaning services22104.2 (3.4 to 5.1)3.1 (2.4 to 3.9)0.96 (0.72 to 1.27)
 Firefighters14033.5 (2.7 to 4.6)1.6 (1.1 to 2.2)0.49 (0.32 to 0.76)
 Emergency healthcare services9103.9 (2.8 to 5.3)1.5 (1.0 to 2.1)0.46 (0.29 to 0.73)
 Burial services4433.6 (2.2 to 5.8)1.9 (0.9 to 2.8)0.57 (0.31 to 1.02)
 Central Market workers3502.9 (1.5 to 5.2)1.7 (0.6 to 2.7)0.51 (0.27 to 0.96)
 Public health services14002.7 (2.0 to 3.7)2.5 (1.7 to 3.3)0.75 (0.50 to 1.13)
 Social services12073.6 (2.7 to 4.8)2.1 (1.4 to 2.8)0.64 (0.44 to 0.92)
  • *Adjusted by age, gender, occupation, epidemiological week, and laboratory.