Study on Long Term Outcomes of Atazanavir in Antiretroviral-naïve Human Immunodeficiency Virus (HIV) Patients in Real Life Setting

Inclusion Criteria: * Male or Female HIV patients ≥ 18 years old at ATV/RTV initiation treatment date * Outpatient seen in routine consultation whatever the reason, between January 1st 2011 and March 31st 2012 * Commencing an ATV/RTV-based regimen including at least 2 nucleoside reverse transcriptase inhibitors (NRTI) after February 1st 2008 and before July 31st 2010, regardless of the current ARV treatment ongoing at enrollment visit Exclusion Criteria: * Patient exposed to or who began ATV/RTV prior to February 1st 2008, or after July 31st 2010 or without a known start date for ATV/RTV therapy * Exposure to more than 4 weeks of any ARV prior to initiation of ATV/RTV treatment * Participation in a clinical trial with ATV at the time of or after initiation of ATV/RTV-based regimen