Number of patients improved at follow up related to the results of lumbar infusion tests and cerebrospinal fluid tap tests
| n (%) of total cohort | Objectively improved | Subjectively improved | |
|---|---|---|---|
| †Neither LIT nor TT was positive. | |||
| ‡Either LIT or TT or both tests were positive. | |||
| Objective improvement was according to the tap test criteria (see Methods); subjective improvement was according to patients and relatives. | |||
| LIT, lumbar infusion test; neg, negative; pos, positive; TT, cerebrospinal fluid tap test. | |||
| Not operated on† | 21 (31%) | 5 (24%) | 4 (19%) |
| Operated on‡ | 47 (69%) | 38 (81%) | 45 (96%) |
| LIT pos | 40 (59%) | 32 (80%) | 39 (98%) |
| TT pos | 17 (25%) | 16 (94%) | 16 (94%) |
| LIT pos/TT neg | 30 (44%) | 22 (73%) | 29 (97%) |
| LIT neg/TT pos | 7 (10%) | 6 (86%) | 6 (86%) |
| LIT pos/TT pos | 10 (15%) | 10 (100%) | 10 (100%) |