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Variances of sling dislocation from resting position during contraction and Valsalva manoeuvre, compared for PP and PVDF by the Ansari-Bradleytest.
| Position | Manoeuvre | Variance, PVDF (cm2) | Variance, PP (cm2) | P value |
|---|---|---|---|---|
| Supine position | Contraction | 0.005 | 0.004 | 0.81 |
| Valsalva | 0.023 | 0.068 | 0.08 | |
|
| ||||
| Upright position | Contraction | 0.004 | 0.036 | 0.85 |
| Valsalva | 0.005 | 0.040 | <0.03 | |
