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. Author manuscript; available in PMC: 2023 Jan 26.
Published in final edited form as: J Am Geriatr Soc. 2022 Nov 8;71(2):414–422. doi: 10.1111/jgs.18116

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

Est. = Estimate, 95% CI = 95% Confidence Interval, ARBS = Agitated Reactive Behavior Scale, PHQ-9 = Patient Health Questionnaire-9

*

p < 0.05

**

p < 0.001

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.