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Table 1 Predictors of transmission (participant primay case, 177 household ILI events)

From: Household transmission of respiratory viruses – assessment of viral, individual and household characteristics in a population study of healthy Australian adults

Explanatory variable Transmission % for group Univariate logistic regression Multivariate logistic regression
OR (95% CI) p OR (95% CI) P
Virus Group (cf none detected) None 20 of 95 (21.1%) 1.00 (def) - 1.00 (def) -
Picornavirus 10 of 40 (25.0%) 1.25 (0.524, 2.98) 0.615 0.996 (0.398, 2.49) 0.994
Influenza 5 of 17 (29.4%) 1.56 (0.493, 4.95) 0.448 1.87 (0.552, 6.36) 0.314
Coronavirus 3 of 6 (50.0%) 3.75 (0.703, 20.0) 0.122 2.43 (0.409, 14.4) 0.330
Other 0 of 8 (0.00%) - - - -
Sex (cf male) Male 9 of 69 (13.0%) 1.00 (def) - 1.00 (def) -
Female 30 of 108 (27.8%) 2.56 (1.13, 5.81) 0.024 2.45 (1.01, 5.93) 0.047
Smoking (cf not current smoker) Not current smoker 36 of 161 (22.4%) 1.00 (def) - 1.00 (def) -
Current smoker 3 of 12 (25.0%) 1.16 (0.298, 4.50) 0.833 1.40 (0.319, 6.12) 0.658
Age (cf 18–24 years) 18-24 years 9 of 47 (19.2%) 1.00 (def) - Not included -
25-34 years 5 of 28 (17.9%) 0.918 (0.274, 3.08) 0.890 Not included -
35-44 years 15 of 37 (40.5%) 2.88 (1.08, 7.66) 0.034 Not included -
45-54 years 6 of 36 (16.7%) 0.844 (0.270, 2.64) 0.771 Not included -
55-64 years 4 of 29 (13.8%) 0.676 (0.188, 2.43) 0.549 Not included -
Household size (cf size 2) 2 14 of 64 (21.9%) 1.00 (def) - Not included -
3 4 of 44 (9.09%) 0.357 (0.109, 1.17) 0.089 Not included -
4 11 of 46 (23.9%) 1.22 (0.456, 2.76) 0.801 Not included -
5 8 of 17 (47.1%) 3.17 (1.03, 9.75) 0.044 Not included -
6 2 of 3 (66.7%) 7.14 (0.602, 84.7) 0.119 Not included -
7 0 of 3 (0.00%) - - Not included -
Presence of child (cf no children in house) No child in house 22 of 123 (17.9%) 1.00 (def) - 1.00 (def) -
At least one child in house 17 of 54 (31.5%) 2.11 (1.01, 4.41) 0.047 2.63 (1.18, 5.88) 0.018