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  • Handley--Emsley-HIMJ-18-0067.R2.20.11.18.FINAL

    Rights statement: The final, definitive version of this article has been published in the Journal, Health Information Management Journal, 49 (1), 2018, © SAGE Publications Ltd, 2018 by SAGE Publications Ltd at the Health Information Management Journal page: https://journals.sagepub.com/home/him on SAGE Journals Online: http://journals.sagepub.com/

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Validation of ICD-10 codes shows intracranial venous thrombosis incidence to be higher than previously reported

Research output: Contribution to journalJournal article

Published
<mark>Journal publication date</mark>1/01/2020
<mark>Journal</mark>Health Information Management Journal
Issue number1
Volume49
Number of pages4
Pages (from-to)58-61
Publication statusPublished
Early online date18/12/18
Original languageEnglish

Abstract

Background: Intracranial venous thrombosis (ICVT) accounts for around 0.5% of all stroke cases. There have been no previously published studies of the International Classification of Diseases, Tenth Edition (ICD-10) validation for the identification of ICVT admissions in adults. Objective: The aims of this study were to validate and quantify the performance of the ICD-10 coding system for identifying cases of ICVT in adults and to derive an estimate of incidence. Method: Administrative data were collected for all patients admitted to a regional neurosciences centre over a 5-year period. We searched for the following ICD-10 codes at any position: G08.X (intracranial and intraspinal phlebitis and thrombophlebitis), I67.6 (non-pyogenic thrombosis of intracranial venous system), I63.6 (cerebral infarction due to cerebral venous thrombosis, non-pyogenic), O22.5 (cerebral venous thrombosis in pregnancy) and O87.3 (cerebral venous thrombosis in the puerperium). Results: Sixty-five admissions were identified by at least one of the relevant ICD-10 codes. The overall positive predictive value (PPV) for confirmed ICVT from all of the admissions combined was 92.3% (60 out of 65) with the results for each code as follows: G08.X 91.5% (54 of 59), O22.5 100% (4 of 4), I67.6 100% (1 of 1), I63.6 100% (1 of 1) and O87.3 100% (1 of 1). There were 40 unique cases of ICVT over a 5-year period giving an annual incidence of ICVT of 5 per million. Conclusions: All codes gave a high PPV. Implications for practice: As demonstrated in previous studies, the incidence of ICVT may be higher than previously thought.

Bibliographic note

The final, definitive version of this article has been published in the Journal, Health Information Management Journal, 49 (1), 2018, © SAGE Publications Ltd, 2018 by SAGE Publications Ltd at the Health Information Management Journal page: https://journals.sagepub.com/home/him on SAGE Journals Online: http://journals.sagepub.com/