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. 2021 Mar 26;8(7):ofab149. doi: 10.1093/ofid/ofab149

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© The Author(s) 2021. Published by Oxford University Press on behalf of Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — Unadjusted association between characteristics of household members of index cases and seropositivity (bivariable analysis). For calculation of odds ratio, the correlation between household members of the same index case was taken into account using GEEs (exchangeable correlation structure, logit link function). Error bars represent the limits of the 95% confidence interval for the odds ratio. ^aAdult participants only. ^bChildren aged <12 considered nonsmokers. Abbreviation: GEEs, generalized estimating equations.