Evaluation of HIV antiretroviral treatment adherence in 2019 using anonymized data from the French national health insurance claims data base: The COCOVIH study

Abstract

Objective: Adherence to antiretroviral treatment (ART) plays a key role in achieving viral suppression in people living with HIV. We aimed to quantify ART adherence in the entire French HIV-infected population treated in 2019 and to determine factors of influence.

Methods: People living with HIV were identified using HIV diagnosis according to International Statistical Classification of Diseases and Related Health Problems, Tenth Revision criteria, HIV-specific laboratory tests, and prescription of antiretrovirals in 2019. Adherence was measured using the medication possession ratio (MPR; actual divided by theoretical number of tablets). Variables of interest included sex, age, type of ART, relevant comorbidities, and receiving supplementary universal health coverage for low-income citizens (CMUc).

Results: Of the n = 211 124 people living with HIV identified between 2006 and 2019, we included n = 140 607 on ART with two or more prescription fills in 2019 in this analysis. In total, 87.5% of people living with HIV were receiving ART in 2019. Mean ± standard deviation MPR was 82.5 ± 22.7%; 57% of people living with HIV had an MPR ≥90%, and 12.7% had an MPR <50%. Those with an MPR ≥90% significantly differed between males and females (59.1% and 52.8%, respectively; p < 0.001), and between CMUc recipients and non recipients (54.1% and 57.6%, respectively; p < 0.001). MPR ≥90% rate was lower for those with chronic nephropathy (50.2%), renal failure (46.6%), and tuberculosis (50.1%), and for those using psychoactive substances (52.3%). Factors associated with MPR ≥90% in multivariable analysis were older age, male sex, not receiving CMUc, more recent HIV diagnosis, and triple (vs. dual) ART.

Conclusion: In 2019, the average MPR in people living with HIV was 82.5% according to the comprehensive French health care database. Besides sociodemographic variables such as older age, male sex, and not being a CMUc recipient (i.e. of low socioeconomic status), more recent HIV diagnosis and triple therapy were independently associated with better adherence, possibly reflecting advances in ART tolerability and dosing.

Keywords: HIV; adherence; antiretroviral therapy; comorbidities; medication possession ratio.