Figure 3.

Protective effects of mask-wearing in differing high-risk exposure contexts. aORs computed using conditional logistic regression models adjusting for vaccination status of respondent, community exposures (listed in main text), characteristics of the high-risk contact, level of coronavirus disease 2019 anxiety prior to testing, and participants’ age, sex, and region of residence. An interaction term was included between mask usage and the contact attribute in 5 separate models. Regression strata were defined for county reopening tiers and week of severe acute respiratory syndrome coronavirus 2 test. The aOR represents the aOR for case status comparing mask usage within each category (with respect to relationship, physical/nonphysical nature of contact, indoor/outdoor exposure, duration, and participant vaccination status). Abbreviations: aOR, adjusted odds ratio; CI, confidence interval.