Table 2.

CVT in-hospital mortality rate 1 year prior compared to 1 year during the COVID-19 pandemic

Variable	No. of hospital	CVT admissions	CVT mortality	Mortality rate (%)	P
Overall
Before COVID-19	138	1,013	35	3.46	0.12
During COVID-19		1,037	50	4.82
Primary stroke centers
Before COVID-19	37	196	8	4.08	0.25
During COVID-19		226	15	6.64
Comprehensive stroke centers
Before COVID-19	101	817	27	3.30	0.29
During COVID-19		811	35	4.32
Center COVID-19 volume: low
Before COVID-19	43	199	6	3.02	0.42
During COVID-19		221	10	4.52
Center COVID-19 volume: intermediate
Before COVID-19	42	243	10	4.12	1.00
During COVID-19		267	11	4.12
Center COVID-19 volume: high
Before COVID-19	44	483	19	3.93	0.23
During COVID-19		464	26	5.60

The before COVID-19 period was the 12 months immediately preceding the during COVID-19 period.

COVID-19, coronavirus disease 2019; CVT, cerebral venous thrombosis.