989345.fig.002
Figure 2: The effect of sleep deprivation on delayed code substitution recall (% correct) in persons classified by JNC-7 criteria of prehypertensive or normotensive. The time by Risk Group interaction was significant [multivariate F(3, 41) = 4.359, , ]. Fisher’s LSD indicates a significant drop in performance at 5:30 AM ( ) and 10:00 AM ( ) in prehypertensives.