The use of comparability ratios to adjust hospital trend data

S.C. Gee and W.F. Page

American Journal of Public Health, 1985, vol. 75, issue 1, 81-82

Abstract: Hospital trend data may be affected by changes in diagnostic coding schemes. We studied the change from ICDA-8 (I-8) to ICD-9-CM (I-9) in a sample of roughly 13,600 double-coded Veterans Administration hospital diagnoses. Comparability ratios were computed and used to adjust trend data which overlap the time period when the shift from I-8 to I-9 occurred. With this adjustment for change in diagnostic coding scheme, apparent diagnostic trends are substantially altered.

Date: 1985
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Persistent link: https://EconPapers.repec.org/RePEc:aph:ajpbhl:10.2105/ajph.75.1.81_9

DOI: 10.2105/AJPH.75.1.81

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