| Total | REF | iNPH | cHC | SIH | AC | PC | IIH |
---|---|---|---|---|---|---|---|---|
Total (CCJ; N) | 32 | 4 | 18 | 3 | 4 | 2 | 1 | 0 |
Direction-independent flow | Â | Â | Â | Â | Â | Â | Â | Â |
 dP (mmHg/cm) | 0.040 ± 0.014 | 0.050 ± 0.012 | 0.038 ± 0.014 | 0.039 ± 0.012 | 0.042 ± 0.015 | 0.030 ± 0.000 | 0.067 | – |
 Total flow/cycle (ml) | 1.146 ± 0.452 | 1.796 ± 0.516 | 0.916 ± 0.358b | 1.221 ± 0.201 | 1.239 ± 0.315 | 1.414 ± 0.059 | 1.537 | – |
 Absolute net flow (ml/cycle) | 0.045 ± 0.047 | 0.074 ± 0.098 | 0.037 ± 0.030 | 0.094 ± 0.049 | 0.015 ± 0.014 | 0.029 ± 0.005 | 0.082 | – |
 Estimated absolute net flow (L/24 h) | 4.726 ± 4.998 | 7.752 ± 10.615 | 4.118 ± 3.818b | 8.371 ± 4.208 | 1.879 ± 2.198 | 2.540 ± 0.204 | 8.381 | – |
Cranially-directed net CSF flow | Â | Â | Â | Â | Â | Â | Â | Â |
 N | 25 (78%) | 4 (100%) | 14 (78%) | 3 (100%) | 2 (50%) | 1 (50%) | 1 (100%) | – |
 Volume (ml/cycle) | 0.047 ± 0.049 | 0.074 ± 0.098 | 0.033 ± 0.024 | 0.094 ± 0.049 | 0.009 ± 0.001 | 0.032 | 0.082 | – |
 Estimated volume (L/24 h) | 4.736 ± 5.007 | 7.752 ± 10.615 | 3.529 ± 2.557 | 8.371 ± 4.208 | 0.911 ± 0.150 | 2.684 | 8.381 | – |
Spinally-directed net CSF flow | Â | Â | Â | Â | Â | Â | Â | Â |
 N | 7 (22%) | 0 | 4 (22%) | 0 | 2 (50%) | 1 (50%) | 0 | 0 |
 Volume (ml/cycle) | 0.039 ± 0.038 | – | 0.051 ± 0.047 | – | 0.021 ± 0.022 | 0.026 | – | – |
 Estimated volume (L/24 h) | 4.688 ± 5.363 | – | 6.182 ± 6.853 | – | 2.848 ± 3.275 | 2.396 | – | – |
CSFAq-CCJ-ratio (%) | 15.5 ± 14.1 | 2.4 ± 2.6 | 21.9 ± 14.1b | 7.9 ± 2.0a | 3.0 ± 3.6 | 24.9 ± 16.4a | 6.6 | – |
Other variables | Â | Â | Â | Â | Â | Â | Â | Â |
 ROI (cm2) | 1.671 ± 0.495 | 1.994 ± 0.657 | 1.585 ± 0.458 | 1.497 ± 0.466 | 1.766 ± 0.578 | 2.111 ± 0.036 | 1.191 | – |
 SNR | 13.205 ± 6.263 | 16.745 ± 6.043 | 10.174 ± 4.285a | 15.863 ± 5.553 | 20.295 ± 5.592 | 8.845 ± 0.259 | 25.975 | – |
 Min velocity (cm/s) | − 1.832 ± 0.784 | − 2.500 ± 0.683 | − 1.615 ± 0.835 | − 2.089 ± 0.419 | − 1.892 ± 0.696 | − 1.478 ± 0.022 | − 2.778 | – |
 Max velocity (cm/s) | 1.011 ± 0.420 | 1.335 ± 0.413 | 0.861 ± 0.334a | 1.200 ± 0.508 | 1.178 ± 0.555 | 0.766 ± 0.065 | 1.678 | – |