Aging With HIV at Younger vs Older Age: a Diverse Population With Distinct Comorbidity Profiles (Aging_in_HIV)

This study is a case-control study, including antiretroviral therapy (ART)-experienced patients, coming from the two following cohorts:

• Modena HIV Metabolic Clinic (MHMC) cohort and
• Romanian HIV cohort (RHC). For this study only patients living with HIV ≥ 20 years will belong to these two cohort. The Aging-Young patients acquired HIV infection in childhood, and Aging-old patients acquired HIV infection above the age of 30.

Aging-Young patients will be matched to Aging-Old patients considering gender and HIV duration (within 1 year interval) (This is the most important matching criteria. The exact number of year of HIV duration since HIV test is the major criteria). An HIV negative test within 5 years prior HIV diagnosis is required in the selection of patients from MHMC to avoid an unpredicted HIV time exposure in these patients.

Then, Aging-young and Aging-old patients will be age, gender matched with a 1: 3 ratio with CINECA (Consorzio Interuniversitario di Calcolo) "ARNO" records (control group, called "HIV-negative group"). The study will analyse 200 HIV Aging-Young and 200 HIV Aging-Old patients in comparison to 1200 controls.

In the first set of analyses, the prevalence of non-infectious comorbidities (NICM) and multimorbidities (MM) in HIV Aging-Young and in HIV Aging-Old groups will be compared to those of HIV-negative group using multivariable logistic regression models. In the second set of analyses, the probability of MM in the HIV Aging-Young cohort will be compared to the HIV Aging-Old one, using multivariable logistic regression models.