TABLE 1.

Multiple regression model including significant parameters, standard errors and t values. Dependent variable is Log (total phenylephrine dose). The multivariate analysis was repeated with just the data from those taken care of by the anesthesiologist who performed most of these cases with the same results (data not shown).

Parameter	Estimate	Standard Error	T-value	Pr ( > [t] )
Intercept	7.92	0.07	117.309	<0.001
B.M.I.	0.18	0.06	2.807	0.005
D.O.S.	0.22	0.06	3.441	<0.001
Ephedrine	0.15	0.06	2.451	0.015
Diuretic	0.45	0.17	2.605	0.010

B.M.I.: Body mass index, D.O.S.: Duration of surgery, Ephedrine: total dose of ephedrine administered during case, Diuretic: patient chronically takes a diuretic as part of an antihypertensive regimen, Pr ( > [t] ): p-value.