Study in HIV1-Positive, Virosuppressed Patients Currently inTreatment With Ritonavir-Boosted Protease Inhibitors (PI/r) Starting Cobicistat-Boosted Darunavir (DRV/c - Rezolsta)

Study Overview
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Brief Summary
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The purpose of this study is to describe the effectiveness of darunavir/cobicistat (DRV/c)-based regimens, measured as maintenance of virological suppression 48 weeks after baseline, defined as the day when the treatment with DRV/c-based regimen is started, through collection of daily practice data in the Italian setting.

Official Title
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Italian Observational, Multicenter Study in HIV1 -Positive, Virosuppressed Patients Currently in Treatment With Ritonavir-boosted Protease Inhibitors (PI/r) Starting Cobicistat-boosted Darunavir (DRV/c - Rezolsta®): the STart Of REzolsta (ST.O.RE.) Study

Conditions
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Human Immunodeficiency Virus

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult greater than or equal to (>=18 years), male and female patients Documented Human Immunodeficiency Virus-1 (HIV-1) infection Eligible to darunavir/cobicistat (DRV/c) treatment according to Summary of Product Characteristics Patients who are able to understand the nature of the study and to provide their consent voluntarily having signed an Informed Consent Form (ICF) allowing data collection and source data verification in accordance with local requirements Patients in stable (>= 12 months) treatment with an Antiretroviral (ARV) therapy PI/ritonavir (PI/r)-based, being prescribed Rezolsta (DRV/c) by treating physician Patients virosuppressed (HIV-RNA less than [<] 50 copies/milliliters) since at least 6 months, within their HIV treatment at the moment of enrollment; single values of HIV-RNA more than [>] 50 copies/ml not confirmed (blips) will be considered acceptable; last value collected being < 50 copies/ml Exclusion Criteria: Patient currently enrolled in an interventional study Patient currently enrolled in an observational study sponsored or supported by Janssen Estimated Glomerular Filtration Rate (eGFR) < 70 milliliters per minute (ml/min) if any co-administered agent (example emtricitabine, lamivudine, tenofovir disoproxil fumarate, or adefovir dipivoxil) requires dose adjustment based on creatinine clearance Pregnancy or breast feeding at enrollment Allergy or intolerance to sulphonamides Switch from darunavir/ritonavir (DRV/r) 600/100 bis in die (bid) Patient currently in mono PI/r therapy Patients to be treated within one year with Direct Acting Antivirals (DAAs) for Hepatitis C Virus (HCV) infection Chemotherapy scheduled

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Cohort 1<br>HIV-1-infected patients being in stable ritonavir-boosted Antiretroviral (ARV) treatment with Protease Inhibitors (PIs) (either darunavir 800 milligram [mg] each day -based or not) since at least twelve months and virologically suppressed (HIV-RNA less than [<]50 copies/milliliters) since at least six months. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Patients With Human Immunodeficiency Virus - RiboNucleic Acid (HIV-RNA) Less Than (<)50 Copies/Milliliters (copies/mL) Measured at Week 48 | The percentage of patients with plasma HIV-RNA<50 copies/mL will be analyzed by FDA snapshot analysis (FDA Snapshot Approach is based on the last observed viral load data within the Week 48 window: virologic response is defined as HIV-1 RNA <50 copies/mL (observed case); If there are no data in the defined time window, the proportion of missing data and relative reason will be provided) and Time to loss of virologic response (TLOVR) method algorithm requires sustained HIV-1 RNA < 50 copies/mL; confirmed HIV-1 RNA more than or equal to (>=) 50 copies/mL is considered as non-response (rebound); patients considered non-responder after permanent discontinuation). | At Visit 4 (Week 48) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change From Baseline in HIV-Symptoms Distress Module (HIV-SDM) Score | HIV-SDM is a questionnaire consisting of 20 questions related to all the symptoms which the patient might have had during the past four weeks. For each question patient has to select appropriate answer related to the symptoms: 0 = I do not have this symptom; 1 = I have this symptom and it doesn't bother me; 2 = it bothers me a little; 3 = it bothers me; 4 = it bothers me a lot. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in HIV-Treatment Satisfaction Questionnaire (HIV-TSQ) Score | The HIV Treatment Satisfaction Questionnaire (HIV-TSQ) is a 10-item instrument that is supported by evidence of good internal consistency reliability. The total score ranges from 0 to 60, with higher scores indicating greater treatment satisfaction. Score change ranges from -30 to +30, with scores<0 and >0 indicating a decrease and increase in treatment satisfaction, respectively. | Baseline, Up to Visit 4 (Week 48) | 
| Percentage of Patients with HIV-RNA <50 copies/mL Measured at Week 24 |  | At Visit 3 (Week 24) | 
| Change From Baseline in CD4 Cell Count | CD4 cell count will be assessed as immunological parameter. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in CD4/CD8 Ratio | CD4/CD8 ratio will be assessed as immunological parameter. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in CD4 Percentage | CD4 percentage will be assessed as immunological parameter. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Creatinine Levels | The change from baseline in serum creatinine up to 48 weeks will be assessed. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in estimated Glomerular Filtration Rate (eGFR) | The change from baseline in eGFR will be assessed by Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula. | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Aspartate Transferase (AST) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Alanine-Amino Transferase (ALT) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Gamma-Glutamyl Transferase (GGT) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Alkaline Phosphatase (ALP) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Total Cholesterol |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Low Density Lypoprotein (LDL) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in High Density Lypoprotein (HDL) |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Triglycerides |  | Baseline, Up to Visit 4 (Week 48) | 
| Change From Baseline in Glucose |  | Baseline, Up to Visit 4 (Week 48) |