Table 2

Logistic regression model SARS-CoV-2: risk factors associated to secondary infection

CovariatesModel without interactionModel with both effect
M1
OR (95% CI)
P valueM2
OR (95% CI)
P value
Gender of index case (ref. females)
 Male1.43 (1.08 to 1.89)0.0131.43 (1.08 to1.89)0.012
Age category of index case (ref. <20) (years)
 20–491.27 (0.92 to1.76)0.1461.22 (0.83 to 1.79)0.311
 50+0.45 (0.26 to 0.79)0.0060.49 (0.25 to 0.94)0.032
Relationship (ref. market/shop/pub)
 HH members1.92 (1.17 to 3.15)0.010.87 (0.21 to 3.64)0.846
 Transport1.44 (0.45 to 4.58)0.5381.22 (0.16 to 9.09)0.844
 Social activity1.38 (0.91 to 2.1)0.1251.21 (0.5 to 2.88)0.674
 Workmates1.69 (0.98 to 2.89)0.0572.8 (1.16 to 6.76)0.022
Relationship and age (ref. market/shop/pub, age <20 years)
 Household members # 20–492.57 (0.55 to 12.01)0.231
 Household members # 50+2.9 (0.36 to 23.24)0.317
 Transport # 20–491.51 (0.13 to 17.67)0.743
 Transport # 50+1
 Social activity # 20–491.3 (0.48 to 3.53)0.61
 Social activity # 50+0.47 (0.05 to 4.38)0.51
 Coworker # 20–490.49 (0.15 to 1.53)0.217
 Coworker # 50+0.39 (0.04 to 3.67)0.414
 Observations11 80911 783