Prevalence of progressive supranuclear palsy and corticobasal syndrome in Scotland

Diane Swallow* (Corresponding Author), Carl Counsell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
2 Downloads (Pure)


Introduction We estimated the point prevalence of progressive supranuclear palsy (PSP) and corticobasal syndrome (CBS) at regional and national levels in Scotland, UK as there are few high-quality prevalence studies of these conditions. Methods Nationally, multiple methods of case ascertainment were used including clinician and nurse specialist referral, searches of ICD-10 diagnostic coding in routinely collected electronic health data (Scottish Morbidity Record), and patient self-referral. In one region we also searched GP databases and unselected hospital correspondence. Cases were verified by clinical examination or medical record review. National and regional total and age-sex stratified crude prevalence rates on 31st December 2018 were calculated. Results The regional crude point prevalence was 4.28 per 100,000 (95% CI 2.90, 6.31) for PSP, and 2.05 per 100,000 (95% CI 1.17, 3.59) for CBS. The national crude prevalence rates were lower due to the greater reliance on passive case ascertainment. There were no clear sex differences. At a national level, the peak crude prevalence rate for both PSP and CBS was in the 70-79 age-group. Discussion The prevalence rates of PSP and CBS were similar to previous estimates with little change over the past 20 years.

Original languageEnglish
Pages (from-to)291–297
Number of pages7
Issue number4
Early online date2 Jun 2022
Publication statusPublished - 2 Jun 2022

Bibliographical note

Open Access via the Karger Agreement
Dr Swallow received a clinical research fellowship jointly funded by the Chief Scientist Office (CSO) of the Scottish Government and PSP Association.

Data Availability Statement

Anonymised data relevant to the analyses within this article can be shared at the request of qualified investigators to replicate presented analyses


  • progressive supranuclear palsy
  • corticobasal degeneration
  • corticobasal syndrome
  • prevalence
  • epidemiology


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