Table 2.

Logistic regression model: association of the mask usage with selected variables by time point (odds ratio (OR) estimates and 95% confidence intervals (CIs) of OR estimates); Poland, 2020; n = 750–818

Variable	Time point 1		Time point 2	Time point 3
	ORa	CI	OR	CI	OR	CI
Gender: female	1.77	1.24–2.53	1.47	1.05–2.00	1.53	1.07–2.12
Area: closed space	2.60	1.54–4.58	2.59	1.69–4.06	2.32	1.54–3.59
Activity: sport	0.64	0.43–0.97	0.54	0.36–0.76	0.54	0.36–0.78

^aOdds ratio (OR) = ratio between the two categories tested in each variable, controlling for other variable