Table 3.

Association Between Infection Control Scores and Weekly COVID-19 Infection Rates by Tertile of Dementia Prevalence, Adjusted for Community Prevalence of COVID-19

	Low Dementia Prevalence (0 to 50%)			Middle Dementia Prevalence (>50 to 62%)			High Dementia Prevalence (>62 to 100%)
Audit Score
	Β Coefficient*	95% CI	p-value	Β Coefficient*	95% CI	p-value	Β Coefficient*	95% CI	p-value	p-value interaction
Mixed Model	−0.01	(−0.08, 0.06)	.71	−0.08	(−0.18, 0.01)	.10	−0.12	(−0.19, −0.05)	<.01	.04
	Odds Ratio†	95% CI	p- value	Odds Ratio†	95% CI	p- value	Odds Ratio†	95% CI	p- value	p-value interaction
Logistic Model	1.22	(1.04, 1.44)	.02	1.12	(0.96, 1.31)	.14	1.16	(1.02, 1.31)	.03	.50
Proper Cohorting (Q3)
	Β Coefficient	95% CI	p- value	Β Coefficient	95% CI	p- value	Β Coefficient	95% CI	p- value	p-value interaction
Mixed Model	−0.38	(−0.92, 0.16)	.17	−0.63	(−1.14, −0.12)	.02	−0.56	(−1.25, 0.13)	.11	.60
	Odds Ratio	95% CI	p-value	Odds Ratio	95% CI	p- value	Odds Ratio	95% CI	p- value	p-value interaction
Logistic Model	13.6	(1.75, 105.55)	.01	22.49	(3.53, 143.42)	<.01	0.83	(0.25, 2.74)	.76	.01
Proper wearing of PPE (Q17)
	Β Coefficient	95% CI	p- value	Β Coefficient	95% CI	p- value	Β Coefficient	95% CI	p- value	p-value interaction
Mixed Model	−0.16	(−0.47, 0.15)	.31	−0.67	(−1.09, −0.25)	<.01	−0.19	(−0.58, 0.2)	.35	.45
	Odds Ratio	95% CI	p-value	Odds Ratio	95% CI	p- value	Odds Ratio	95% CI	p- value	p-value interaction
Logistic Model	4.1	(2.09, 8.05)	<.0001	1.44	(0.69, 2.97)	.33	2.68	(1.22, 5.91)	.01	0.32

Notes: CI = confidence interval; PPE = personal protective equipment.

*A negative β coefficient indicates a decrease in weekly infection rate with a 1-unit increase in the independent variable.

^†Odds ratio indicates increased odds of having zero infections with 1-unit increase in independent variable.