Impact of the COVID-19 Pandemic and Vaccine Availability on Utilization of Breast Imaging in a Multistate Radiology Practice

Table 2

Plot results showing trend and level change estimates.

Parameter	Interpretation	Estimates	Standard error	value	95% CI
β0	Baseline total service volume in January 2019	114,901.5	4262.4	<0.0001	(106,279.9, 123,523.0)
β1	Trend per month prior to March 2020	4,864.0	883.4	<0.0001	(3,077.1, 6,650.9)
β2	Level change in March 2020	−104,446.3	33429.1	0.003	(−17,2063.1, −36,829.5)
β3	Trend change per month after March 2020 but prior to December 2020 (relative to the pre-March 2020 trend)	20,660.7	5849.8	0.001	(8,828.5, 32,493.0)
β4	Level change in December 2020	−69,791.2	26603.9	0.012	(−123,602.6, −15,979.7)
β5	Trend change per month after December 2020 (relative to the March to November 2020 trend)	−24,213.9	5840.6	<0.0001	(−36,027.6, −12,400.2)