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Population based mortality and quality of death certification in progressive supranuclear palsy (Steele-Richardson-Olszewski syndrome)

Lookup NU author(s): Dr Uma Nath, Professor Richard Thomson, Ruth Wood, Professor David Burn

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Abstract

Objective: To estimate the mortality of progressive supranuclear palsy (PSP) and to assess the quality of death certification in patients with PSP who died in England and Wales. Methods: An analysis was conducted of ICD-9 (International Classification of Diseases, version 9) coded deaths obtained through the Office of National Statistics over an eight year period. Results: The crude annual mortality rate was 1.77 (95% confidence interval, 1.64 to 1.90) cases per million, using the mid-1996 population estimate for England and Wales. Annual mortality increased over time, possibly as a result of increased incidence or increased awareness of the disorder. Forty nine death certificates from deceased patients previously diagnosed clinically showed that the commonest proximate cause of death was pneumonia, occurring in 45% of cases (22/49). The underlying cause of death was cited as pneumonia in 14% of cases (7/49). PSP was mentioned in only 65% of death certificates (32/49). Eight of the 49 cases (16%) underwent necropsy and results were available for five of these cases. PSP was confirmed pathologically in four; the remaining case was diagnosed as Parkinson's disease. Conclusions: Further research is needed to establish the reasons for the observed increase in mortality. Determining the population mortality rate for PSP using the ICD-9 coding system is problematic but is likely to improve following the introduction of ICD-10 updated codes and coding rules.


Publication metadata

Author(s): Nath U, Thomson R, Wood R, Ben-Shlomo Y, Lees A, Rooney C, Burn DJ

Publication type: Article

Publication status: Published

Journal: Journal of Neurology, Neurosurgery and Psychiatry

Year: 2005

Volume: 76

Issue: 4

Pages: 498-502

Print publication date: 01/04/2005

ISSN (print): 0022-3050

ISSN (electronic): 1468-330X

Publisher: BMJ Group

URL: http://dx.doi.org/10.1136/jnnp.2004.039370

DOI: 10.1136/jnnp.2004.039370

PubMed id: 15774434


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