Table 4.
Distribution of age-dependent and gender-independent normal ranges regarding the maximum helical forward velocity (Vfor) and the age- and gender-independent maximum helical circumferential velocity (Vcirc)
| Parameter | Age dependency | Gender dependency | Age | Median | Lower limit | Upper limit |
|---|---|---|---|---|---|---|
| Maximum helical forward velocity (Vfor) (cm/s) |
Yes (R = − 0.583, p = 0.038) |
No | 19–30 | 58.9 | 20.8 | 96.2 |
| 31–40 | 53.2 | 14.5 | 89.7 | |||
| 41–50 | 50.0 | 9.0 | 83.6 | |||
| 51–60 | 44.4 | 7.3 | 81.4 | |||
| > 60 | 38.1 | 4.7 | 80.3 | |||
| Maximum helical circumferential velocity (Vcirc) (cm/s) | No | No | - | 70.1 | 18.9 | 103.1 |