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Table 2: Results of groin puncture to reperfusion bootstrap while controlling for site^{^a}
Variable Estimate Standard Error P Value
Simmons (none) 13.74 8.01 .09
Tandem (none) 25.65^{^b} 8.0^{^b} .02^{^b}
Takeoff angle [10 degrees] 5.29^{^b} 1.70^{^b} .002^{^b}
Aorta cranial-caudal [5 mm] 2.98^{^b} 1.48^{^b} .05^{^b}
Left side (right) 2.32 5.01 .64
Site 2 (site 1) 2.48 6.42 .70
Site 3 (site 1) –12.16 6.38 .06
↵a Categoric values are indicated by parentheses with the baseline comparison within the parentheses. For continuous variables, units are shown in brackets.
↵b Significant associations.

Variable	Estimate	Standard Error	P Value
Simmons (none)	13.74	8.01	.09
Tandem (none)	25.65^{^b}	8.0^{^b}	.02^{^b}
Takeoff angle [10 degrees]	5.29^{^b}	1.70^{^b}	.002^{^b}
Aorta cranial-caudal [5 mm]	2.98^{^b}	1.48^{^b}	.05^{^b}
Left side (right)	2.32	5.01	.64
Site 2 (site 1)	2.48	6.42	.70
Site 3 (site 1)	–12.16	6.38	.06