To asses the effects of poorer outcomes, we added the peri-procedural mortality of low volume centres in the US, using the observed risk ratio of death to the risks of stroke or death; low volume centres showed a 1.8 times higher peri-procedural mortality. 50
To asses the effects of poorer outcomes, we added the peri-procedural mortality of low volume centres in the US, using the observed risk ratio of death to the risks of stroke or death; low volume centres showed a 1.8 times higher peri-procedural mortality.[50]
