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WP1-10 Prevalence of normal pressure hydrocephalus in falls clinic patients
  1. S Sennik,
  2. C Craven,
  3. L D’Antona,
  4. H Asif,
  5. W Dawes,
  6. L Thorne,
  7. A Toma,
  8. L Watkins
  1. National Hospital for Neurology and Neurosurgery, London, UK


Objectives Patients with idiopathic Normal Pressure Hydrocephalus (iNPH) present with Hakim Adams triad and radiological findings suggestive of iNPH. We compare the presence of clinical and radiological signs of iNPH present in patients presenting to falls clinic at a District General Hospital with the general population.

Design Retrospective analysis of patients referred to falls clinic (January 2017 to December 2017) and interpretation of CT or MRI head imaging with Evans index.

Subjects Falls clinic patients presenting to a District General Hospital outpatient clinic.

Methods Retrospective cohort of patients admitted to a single District General Hospital with falls and recent CT or MRI head. An Evans Index above 0.35 was used as an indicator of hydrocephalic ventricular enlargement.

Results 371 patients were seen in one year. 216 had previous CT or MRI head. 6.75% of all patients seen in falls clinic (11.6% who have had brain imaging) have hydrocephalic ventricular enlargement. This is compared to 4.5% in a study of patients aged 70 and over in a normal population.1

Conclusions Patients seen in Falls clinic have an increased probability of having radiological signs consistent with idiopathic normal pressure hydrocephalus.


  1. Jaraj D, Marlow T, Jensen C, Skoog I, Wikkelso C. Prevalence of idiopathic normal-pressure hydrocephalus. Neurology2014April 22;82(16):1449–1454.

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