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. 2023 Mar 23;131:119–126. doi: 10.1016/j.ijid.2023.03.036

Table 3.

Adjusted relative likelihood of seroconversion through follow-up.

Hazard ratio* (95% CI) P-value
Sex
 Male ref
 Female 1.48 (1.10-2.00) 0.01
Age, years
 2-4 ref
 5-11 1.21 (0.79-1.83) 0.38
 12-18 1.05 (0.67-1.63) 0.84
Body mass index
 Underweight or normal weight ref
 Overweight 0.77 (0.49-1.21) 0.26
Chronic medical conditions
 None ref
 Yes 1.17 (0.67-2.03) 0.58
Neighborhood
 Plateau ref
 Montréal North 1.38 (0.84-2.28) 0.20
 HOMA 1.11 (0.74-1.67) 0.62
 West Island 0.47 (0.27-0.81) 0.007
Parental respondent's level of education
 No Bachelor's degree ref
 Bachelor's degree 1.09 (0.73-1.62) 0.68
 Graduate degree 1.18 (0.80-1.76) 0.41
Parental respondent's race and ethnicity
 White ref
 Racial or ethnic minority 1.92 (1.30-2.82) 0.001
Bedroom density (persons per bedroom)
 <1.5 ref
 1.5+ 1.34 (0.99-1.82) 0.059
Dwelling type
 Other
 Single family 0.84 (0.60-1.16) 0.28
Annual household income
 < $100,000 CAD ref
 ≥ $100,000 CAD 0.59 (0.42-0.82) 0.002
Household member occupation
 Not essential ref
 Essential, not health 1.17 (0.83-1.65) 0.38
 Essential 1.22 (0.83-1.81) 0.31
Predominant variant
 Alpha ref
 Not a variant of concern 0.52 (0.26, 1.03) 0.06
 Delta 2.20 (1.37, 3.53) 0.001
 Omicron 1.51 (0.74, 3.05) 0.26

*longitudinal data from 1690 children; a minimum of 45 days of follow-up (half the risk set period) was required for inclusion in the analysis.

CI, confidence interval.