Study shines light on 'low-value' vitaminD tests macquarie_uni
Using a unique population-based dataset, we aimed to describe the patterns of 25OHD test ordering between 2003 and 2018 by Australian general practitioners for children and adolescents aged up to 18 years, including test numbers, repeat testing and detection of vitamin D deficiency.We used non-identifiable electronic health record data, from the state of Victoria, Australia, 2003–2018.
We identified all pathology test results for patients aged up to 18 years. Extracted information included non-identifiable patient identifier number , test name/Systematized Nomenclature of medicine code of pathology test, test result, abnormality of test result as indicated by pathology provider , and test request and result dates. Vitamin D test results were identified through SNOMED codes and test result names.
A total of 970 816 laboratory tests were performed in 356 514 children aged up to 18 years; 61 809 test orders included a 25OHD test in 46 960 children. Breakdown of the tests by age, season, year and socioeconomic status is presented in. Slightly more tests were ordered in winter and spring compared with summer. The proportion of 25OHD tests ordered increased with age, peaking among adolescents aged 14–18 years compared with infants aged 0–1 year.
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