Preoperative VV and postoperative absolute and relative decreases in VV among 57 patients operated on for iNPH
| Median (Minimum, p25, p75, Maximum) | VV vs iNPH Scale Scorea | |
|---|---|---|
| Preoperative VV (mL) | 141.4 (70.8, 133.4, 167.9, 317.8) | r = –0.08P = .59 |
| Postoperative VV (mL) | 120.8 (4.1, 103.7, 137.9, 309.0) | r = –0.28P = .036 |
| Postoperative absolute decrease in VV (mL) | 24.1 (−4.0, 15.9, 34.2, 100.1) | r = 0.54P < .001 |
| Postoperative relative decrease in VV (%) | 16.3 (−2.1, 10.5, 23.1, 96.1) | r = 0.56P < .001 |
↵a Spearman rank correlation test between VV and postoperative change in the iNPH scale score.