Venular length measures in LIFE MRI (n = 53) for tortuous and straight venules separately
| Tortuous | Straight | P Valuea | |
|---|---|---|---|
| Total length of venules (mean) (SD) (mm)c | 156.87 (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.