At baseline CT angiography , proximal occlusions ( n = @ ) demonstrated no difference in primary outcome ( @ % -LSB- @ of @ -RSB- endovascular vs @ % -LSB- @ of @ -RSB- intravenous -LSB- IV -RSB- tissue-plasminogen activator -LSB- tPA -RSB- ; relative risk , @ -LSB- @ % confidence interval : @ , @ -RSB- ; P = @ ) ; however , @-hour recanalization rate was higher for endovascular treatment ( n = @ ; @ % -LSB- @ of @ -RSB- endovascular vs @ % -LSB- @ of @ -RSB- IV tPA ; P < @ ) .