Identifying injection drug use and estimating population size of people who inject drugs using healthcare administrative datasets

The International Journal on Drug Policy
N Z JanjuaBC Hepatitis Testers Cohort Team

Abstract

Large linked healthcare administrative datasets could be used to monitor programs providing prevention and treatment services to people who inject drugs (PWID). However, diagnostic codes in administrative datasets do not differentiate non-injection from injection drug use (IDU). We validated algorithms based on diagnostic codes and prescription records representing IDU in administrative datasets against interview-based IDU data. The British Columbia Hepatitis Testers Cohort (BC-HTC) includes ∼1.7 million individuals tested for HCV/HIV or reported HBV/HCV/HIV/tuberculosis cases in BC from 1990 to 2015, linked to administrative datasets including physician visit, hospitalization and prescription drug records. IDU, assessed through interviews as part of enhanced surveillance at the time of HIV or HCV/HBV diagnosis from a subset of cases included in the BC-HTC (n = 6559), was used as the gold standard. ICD-9/ICD-10 codes for IDU and injecting-related infections (IRI) were grouped with records of opioid substitution therapy (OST) into multiple IDU algorithms in administrative datasets. We assessed the performance of IDU algorithms through calculation of sensitivity, specificity, positive predictive, and negative predictive values. S...Continue Reading

Citations

Jul 27, 2018·Journal of Viral Hepatitis·Maryam DarvishianMel Krajden
Aug 25, 2019·Liver International : Official Journal of the International Association for the Study of the Liver·Sofia R BartlettNaveed Z Janjua
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Oct 31, 2019·Journal of Viral Hepatitis·Maryam DarvishianNaveed Z Janjua
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Jun 22, 2020·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Austin E CoyeJoan E St Onge
Apr 13, 2019·Hepatology Communications·Naveed Z JanjuaUNKNOWN British Columbia Hepatitis Testers Cohort Team
Mar 7, 2020·Journal of General Internal Medicine·Sabrina A AssoumouBenjamin P Linas
Apr 10, 2020·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Alysse Gail Wurcel
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Dec 12, 2020·Liver International : Official Journal of the International Association for the Study of the Liver·Prince A AduNaveed Z Janjua
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Jul 3, 2021·American Journal of Preventive Medicine·Xinyi JiangHaesuk Park
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Sep 21, 2021·The Journal of Rural Health : Official Journal of the American Rural Health Association and the National Rural Health Care Association·Cameron BushlingAngela Taylor

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