Table 1: Means (± standard errors) for systolic and diastolic blood pressure and cognitive performance accuracy across a night of sleep deprivation with sustained cognitive work. All cognitive performance data are in percent correct.

8:30 PM1:00 AM5:30 AM10:00 AM

Systolic blood pressure (mmHg)113.0 (1.64)112.6 (1.78)111.5 (1.72)112.0 (1.57)
Diastolic blood pressure (mmHg)66.3 (1.13)67.2 (1.03)66.6 (1.22)66.5 (1.00)
Category recall74.2 (2.05)75.1 (2.42)69.9 (2.58)72.2 (2.41)
Code substitution learning96.6 (.40)94.9 (.66)91.4 (.87)92.7 (.90)
Code substitution immediate recall93.3 (1.16)88.5 (2.18)83.2 (2.73)86.9 (1.92)
Code substitution delayed recall91.5 (1.53)85.0 (2.37)80.2 (2.18)81.0 (2.31)
Sternberg memory recall96.7 (.50)91.6 (1.20)90.1 (1.87)86.7 (1.99)
Continuous performance test90.2 (1.15)83.9 (2.35)76.6 (2.32)75.3 (2.56)