Outcome measures and assessments
| Outcome | Measure | Baseline | 3 months | 6 months | Postoperative | 12 months (primary endpoint) | 24 months | 60 months |
| ICP | Lumbar puncture | x | x | x | x | x | ||
| Clinical measures | BMI, blood pressure, waist/hip, fat mass, medication use | x | x | x | x | x | x | x |
| IIH symptoms | Pulsatile tinnitus, visual loss, diplopia, visual obscurations | x | x | x | x | |||
| Visual function | Visual acuity, contrast sensitivity, colour assessment | x | x | x | x | |||
| Humphrey visual field (24–2) | x | x | x | x | ||||
| Papilloedema | Optical coherence tomography | x | x | x | x | |||
| Retinal photographs | x | x | x | x | ||||
| Headache | HIT-6, headache diary | x | x | x | x | |||
| Quality of life | EQ-5D-5L, ICECAP-A, SF-36 v1, HADS | x | x | x | x | |||
| Health economics | Resource use questionnaire | x | x | x | x |
BMI, body mass index; EQ-5D-5L, EuroQol 5 Dimensions questionnaire; HADS, Hospital Anxiety and Depression Scale; HIT-6, Headache Impact Test-6; ICECAP-A, ICEpop CAPability measure for Adults; ICP, intracranial pressure; IIH, idiopathic intracranial hypertension; SF-36 v1, RAND 36-Item Short Form Survey Version 1.