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Table 2: 
Aqueductal stroke volume, peak velocity, and aqueductal area in controls and patients at baselinea
Healthy Controls (n = 21)Patient Baseline (n = 21)P Valueb
ACSV (μL)62.5 (58.3–73.8)103.5 (69.8–142.8)<.01
Peak velocity (mm/s)103 (79.5–113.5)103 (68.5–166.5)NS
Net flow (μL)−2.9 (−5.65–2.55)−1.6 (−19–14)NS
Aq area (mm2)18 (15.5–19)22 (19–25)<.001
  • Note:—Aq indicates aqueductal; NS, not signifiicant.
  • ↵a Data are median with IQR in parentheses.
  • ↵b Wilcoxon signed rank test.