Table 2.

Ethnic differences in sensitivity of phenylephrine

Outcome		Caucasians	African Americans	P-value
ED50, ng/min, mean (95% CI)	All	310 (222 to 434)	172 (115 to 256)	0.026
		n=64	n=42	*0.003
	Males	376 (245–578)	160 (96–268)	0.011
		n=33	n=24	*0.001
	Females	253 (148–432)	188 (95–374)	0.49
		n=31	n=18	*0.20

^*After adjustment for age, BMI, family history of hypertension, baseline systolic and diastolic blood pressure, baseline heart rate, baseline norepinephrine and epinephrine values