Table 3.

Changes in ED Operational Performance Metrics Across the Health System. Data are percent changes comparing the pre-COVID-19 (1/1/2020–3/3/2020) and the post-response (3/25/2020–4/22/2020) time periods. LWBS, left without being seen; LOS, length of stay; D2D, door-to-doc time.

	Very high-volume %Change	High-volume %Change	Average to low-volume %Change
Daily volume (#)	−37.9%⁎⁎⁎	−39.0%⁎⁎⁎	−41.9%⁎⁎⁎
LWBS (#)	−89.5%⁎⁎⁎	−50.0%⁎	−100.0%⁎
Admit (%)	14.1%⁎⁎⁎	9.9%⁎	13.30%
ED LOS (hrs)	−36.1%⁎⁎⁎	−22.5%⁎⁎⁎	−14.7%⁎⁎⁎
Boarding LOS (hrs)	−49.4%⁎⁎⁎	−10.0%⁎⁎	−20.9%⁎⁎⁎
D2D (mins)	−83.8%⁎⁎⁎	−62.9%⁎⁎⁎	−61.1%⁎⁎⁎

^⁎p < 0.05.

^⁎⁎p < 0.01.

^⁎⁎⁎p < 0.001.