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Table 2: 
Venular length measures in LIFE MRI (n = 53) for tortuous and straight venules separately
TortuousStraightP Valuea
Total length of venules (mean) (SD) (mm)c156.87 (53.18)111.41 (50.11)<.001b
No. of venules (mean) (SD)18.09 (5.87)13.11 (5.34)<.001b
Average length of venules (mean) (SD) (mm)8.64 (0.87)8.30 (1.42).07
  • ↵a P values based on paired t tests comparing tortuous and straight venule characteristics.
  • ↵b Significant.
  • ↵c Venule lengths: for each participant, venules were traced in 4-cm2 ROIs (1 in each hemisphere), their length was measured by 3 raters, and median length was computed for each vessel. Venules are characterized as straight or tortuous. The total straight and tortuous venular length in millimeters is calculated for each participant.