Over @ hours , standing HR was not significantly different between the modafinil and placebo groups ( analysis of variance -LSB- ANOVA -RSB- Pdrug = @ ) , but seated SBP was significantly higher in the modafinil group ( mean -LSB- SD -RSB- , @ -LSB- @ -RSB- mm Hg vs @ -LSB- @ -RSB- mm Hg ; P = @ ) .