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Cost of HAART in Italy: multicentric evaluation and determinants from a large HIV outpatient cohort

Authors Tontodonati M, Cenderello G, Celesia BM, Trezzi M, Ursini T, Costantini A, Marra D, Polilli E, Catalani C, Butini L, Sozio F, Mazzotta E, Sciacca A, Rizzardini G, Manzoli L, Cozzi-Lepri A, Parruti G

Received 10 June 2014

Accepted for publication 28 August 2014

Published 22 December 2014 Volume 2015:7 Pages 27—35

DOI https://doi.org/10.2147/CEOR.S69183

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Giorgio Colombo

Monica Tontodonati,1,2 Giovanni Cenderello,3 Benedetto Maurizio Celesia,4 Michele Trezzi,5 Tamara Ursini,2 Andrea Costantini,6 Domenico Marra,7 Ennio Polilli,8 Corrado Catalani,5 Luca Butini,6 Federica Sozio,8 Elena Mazzotta,9 Antonina Sciacca,8 Giuliano Rizzardini,10 Lamberto Manzoli,11 Alessandro Cozzi-Lepri,12 Giustino Parruti8

1Infectious Disease Unit, Pescara General Hospital, Pescara, 2Clinic of Infectious Diseases, G D'Annunzio University of Chieti-Pescara, Chieti, 3Division of Infectious Disease, Galliera General Hospital, Genoa, 4Infectious Diseases Unit, ARNAS Garibaldi, Catania, 5Infectious Diseases Unit, Pistoia General Hospital, Pistoia, 6Clinical Immunology Unit, Ancona Hospital, Ancona, 7Division of Oncology, Galliera General Hospital, Genoa, 8Infectious Diseases Unit, Pescara General Hospital, Pescara, 9Internal Medicine Department, G D'Annunzio University of Chieti-Pescara, Chieti, 10First Infectious Diseases Department, Luigi Sacco Hospital, Milan, 11Section of Hygiene, Epidemiology, Pharmacology and Legal Medicine, G D'Annunzio University of Chieti-Pescara, Chieti, Italy; 12Research Department of Infection and Population Health, University College London, London, UK

Background: As HIV infection turned into a chronic treatable disease, now ranking as one of the most costly in medicine, long-term sustainability of highly active antiretroviral treatment (HAART) expenses became a major issue, especially in countries with universal access to care. Identification of determinants of higher HAART costs may therefore help in controlling costs of care, while keeping high levels of retention in care and viral suppression.
Methods: With this aim, we enrolled a large multicentric sample of consecutive unselected human immunodeficiency virus (HIV) patients followed at five sites of care in Italy, and evaluated annual individual HAART costs in relation to a number of sociodemographic, clinical, and laboratory variables.
Results: We enrolled 2,044 patients, including 1,902 on HAART. Mean HAART costs were €9,377±€3,501 (range 782–29,852) per year, with remarkable site-based differences, possibly related to the different composition of local assisted populations. Percentages of patients on viral suppression were homogeneously high across all study sites. The factors identified by cross-validation were line of HAART, diagnosis of acquired immune deficiency syndrome, current CD4 T-cell count, and detectable HIV viremia >50 copies/mL. In the final multivariable model, HAART costs were independently directly associated with more advanced HAART line (P<0.001) and inversely correlated with current CD4 T-cell count (P=0.024). Site of care held independent prediction of higher costs, with marked control of expenses at sites 2 (P=0.001) and 5 (P<0.001).
Conclusion: Higher costs of HAART were strongly associated with previous treatment failures, detectable HIV viremia, and lower CD4 T-cell count at the time of evaluation, with no correlation at all with sex, age, hepatitis C virus coinfection, and nadir CD4 T-cell counts. Newer drugs, which are typically those associated with high prices, at the time of the analysis were still prevalently prescribed to rescue and maintain viral suppression in patients with more complex treatment history. Further analyses of the contribution of the single drug/regimen to the estimated cost are warranted.

Keywords: highly active antiretroviral treatment, human immunodeficiency virus, costs, treatment failures, viremia, current CD4 count

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