Table 2.

Temporal changes in the number of patients receiving reperfusion therapy in each hospital.

	EVT hospitals	Non-EVT hospitals	P valuea
Hospital volume, mean ± SD
2010	13.6 ± 9.6	6.8 ± 7.3
2011	14.2 ± 9.5	6.5 ± 6.9
2012	15.3 ± 11.9	6.4 ± 6.7
2013	17.1 ± 13.0	6.9 ± 7.7
2014	17.5 ± 14.8	6.1 ± 7.3
2015	18.4 ± 16.2	5.5 ± 6.8
Pre-extension period
B1 (SE)	−0.004 (0.006)	−0.003 (0.002)	.97
P value	.55	.09
Immediately after extension
B2 (SE)	0.18 (0.08)	0.10 (0.04)	.32
P value	.02	.009
Post-extension period
B3 (SE)	0.011 (0.006)	0.001 (0.002)	.16
P value	.10	.59