TABLE 2.

Interrupted time series analysis results for behavioral and depression symptoms among long‐stay nursing home residents with Alzheimer's disease and related dementias pre‐COVID‐19 and during the COVID‐19 pandemic.

	Behavioral symptoms (ARBS ≥ 1)		Depression symptoms (PHQ‐9 ≥ 10)
	Est.	95% CI	Est.	95% CI
Period 1 (Jan 2018–Feb 2020): Pre‐COVID‐19
% Symptoms at beginning of period 1 (Jan 2018)	20.0		2.9
Slope during pre‐COVID‐19 period	0.002	−0.04, 0.04	0.01	−0.01, 0.03
Period 2 (Mar 2020 – Jun 2021): During COVID‐19
Slope during COVID‐19 period	0.05	−0.02, 0.12	0.04	0.02, 0.06*
Slope change pre‐ and during COVID‐19	0.05	−0.04, 0.14	0.03	0.004, 0.06*
% Symptoms at end of period 2 (Jun 2021)	19.9		4.0

Abbreviations: Est., estimate; 95% CI, 95% confidence interval; ARBS, Agitated Reactive Behavior Scale; PHQ‐9, Patient Health Questionnaire‐9.

Note: Residents with diagnoses of Huntington's disease, Tourette syndrome, or schizophrenia were excluded. Prevalence reported in the predicted percent from the interrupted time series model.

^* p < .05.