Table 5.

Sensitivity Analysis Adjusting for Season of Ambulance Transport Date

Outcome	Mean Difference Estimate	95% CI	P Value
Dispatch to treatment with tPA	−26.1	−46.2 to −6.0	0.01
Dispatch to ambulance arrival	7.8	3.9–11.7	<0.001
Ambulance arrival to treatment with tPA	−33.9	−53.4 to −14.5	<0.001

All times in minutes. Conventional care group estimate is subtracted from mobile stroke unit group estimate; model is identical to that in Table 4 with the additional adjustment for season of transport. tPA indicates tissue plasminogen activator.