SI grades in various CSF spaces in patients breathing 50% and 100% O2 and in healthy volunteers breathing room air
| CSF Space | Group | Control (n = 25) | Multiple Comparisons and P Value | ||
|---|---|---|---|---|---|
| Grade | 50% O2 (n = 21) | 100% O2 (n = 31) | |||
| CPA cistern | 0 | 17 | 3 | 7 | 50% O2 vs control, .002 |
| I | 3 | 3 | 16 | 100% O2 vs control, <.001 | |
| II | 1 | 25 | 2 | 50% O2 vs 100% O2, <.001 | |
| Ambient cistern | 0 | 17 | 3 | 22 | 50% O2 vs control, .586 |
| I | 4 | 2 | 3 | 100% O2 vs control, <.001 | |
| II | 0 | 26 | 0 | 50% O2 vs 100% O2, <.001 | |
| Interpeduncular cistern | 0 | 18 | 2 | 24 | 50% O2 vs control, .324 |
| I | 3 | 1 | 1 | 100% O2 vs control, <.001 | |
| II | 0 | 28 | 0 | 50% O2 vs 100% O2, <.001 | |
| Prepontine cistern | 0 | 6 | 1 | 1 | 50% O2 vs control, .041 |
| I | 6 | 2 | 8 | 100% O2 vs control, <.044 | |
| II | 9 | 28 | 16 | 50% O2 vs 100% O2, <.001 | |
| Quadrigeminal cistern | 0 | 18 | 3 | 24 | 50% O2 vs control, .372 |
| I | 3 | 3 | 1 | 100% O2 vs control, <.001 | |
| II | 0 | 25 | 0 | 50% O2 vs 100% O2, <.001 | |
| Suprasellar cistern | 0 | 15 | 2 | 18 | 50% O2 vs control, .936 |
| I | 5 | 1 | 6 | 100% O2 vs control, <.001 | |
| II | 1 | 28 | 1 | 50% O2 vs 100% O2, <.001 | |
| Convexity sulci | 0 | 19 | 3 | 25 | 50% O2 vs control, .357 |
| I | 2 | 1 | 0 | 100% O2 vs control, <.001 | |
| II | 0 | 27 | 0 | 50% O2 vs 100% O2, <.001 | |
| Fourth ventricle | 0 | 15 | 12 | 15 | 50% O2 vs control, .940 |
| I | 1 | 5 | 8 | 100% O2 vs control, .019 | |
| II | 5 | 14 | 2 | 50% O2 vs 100% O2, .021 | |
| Third ventricle | 0 | 18 | 8 | 22 | 50% O2 vs control, .645 |
| I | 1 | 10 | 3 | 100% O2 vs control, <.001 | |
| II | 2 | 13 | 0 | 50% O2 vs 100% O2, <.001 | |
| Lateral ventricles | 0 | 18 | 17 | 21 | 50% O2 vs control, .900 |
| I | 3 | 9 | 4 | 100% O2 vs control, .008 | |
| II | 0 | 5 | 0 | 50% O2 vs 100% O2, .008 | |
| Sylvian fissures | 0 | 21 | 3 | 25 | 50% O2 vs control, >.999 |
| I | 0 | 18 | 0 | 100% O2 vs control, <.001 | |
| II | 0 | 10 | 0 | 50% O2 vs 100% O2, <.001 | |