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Table 1: 
Age, heart rate, aqueductal flow, and anatomic features and peak transmantle pressuresa
Total (n = 77)Female (n = 49)Male (n = 28)Sex (P Value)
Age (yr)69 (SD, 14)72 (SD, 13)65 (SD, 16).114
Heart rate (BPM)64 (SD, 9)63 (SD, 7)66 (SD, 11).305
Flow and anatomic features
    Area (mm2)3.15 (SD, 1.03)2.90 (SD, 0.88)3.58 (SD, 1.13).016
    Stroke volume (μl)40 (SD, 20)40 (SD, 20)42 (SD, 20).571
    Length (mm)17.3 (SD, 2.8)16.9 (SD, 2.8)18.0 (SD, 2.5).065
Peak transmantle pressure
    Pressure+ (Pa)14.44 (SD, 6.49)14.54 (SD, 6.13)14.25 (SD, 7.18).564
    Pressure− (Pa)6.94 (SD, 2.82)7.02 (SD, 2.69)6.79 (SD, 3.07).586
  • Note:—BPM indicates beats per minute; +, peak positive pressure during caudal flow; −, peak negative pressure during rostral flow.
  • ↵a Data are means unless otherwise indicated.