BackgroundTo determine the prevalence and associated factors with chronic kidney disease (CKD) in a cohort of HIV-positive individuals with undetectable viral load on HAART.MethodsFrom March, 2009 to September 2009, 213 individuals between 18-70 years, period on HAART ≥12 months, viral load < 50 copies/mm3, and CD4 ≥ 200 cells/mm3, were consecutively enrolled at the outpatient clinic of Hospital de Clínicas, Porto Alegre, Brazil. Exclusion criteria were obesity, malnourishment, amputee, paraplegic, previous history of renal disease, pregnancy and hepatic insufficiency. Renal function was determined by estimated glomerular filtration rate (eGFR) assessed by the modification of diet in renal disease. CKD was defined as an eGFR less or equal than 60 ml/min/1.73 m2, for a period of at least 3 months. Poisson regression was used to determine factors associated with CKD.ResultsCKD was diagnosed in 8.4% of the population, and after adjustment, the risk factors were hypertension (RR = 3.88, 95%CI, 1.84 - 8.16), time on HAART (RR = 1.15, 95%CI,1.03–1.27) and tenofovir exposure (RR = 2.25, 95%CI, 1.04–4.95). Higher weight (RR = ,0.88 95%CI, 0.82–0.96) was associated to normal function.ConclusionsCKD was a common finding in this cohort of patients and was related to hypertension, time on HAART and tenofovir exposure. We suggest a more frequent monitoring of renal function, especially for those with risk factors to early identify renal impairment.

In this cohort of well-controlled HIV-positive individuals, patients with lower weight or body mass index had a higher chance of presenting elevated plasma concentrations of efavirenz. Therapeutic drug monitoring to adjust dose might be a helpful tool to decrease efavirenz dose in order to minimize costs and adverse effects.

Background: Renal impairment is increasingly reported among HIV-Infected patients and has been associated to an increased chance of cardiovascular disease and death. Therefore, early identification of this problem could help to reduce morbidity and mortality among these individuals. The objective of the study was to determine the prevalence and associated factors with mild decrease in renal function of HIV-infected patients on highly-active antiretroviral therapy (HAART) and undetectable viral load in Brazil. Methods: Individuals between 18-70 years of age with time on HAART ≥ 12 months, viral load < 50 copies/mm 3 , and CD4 ≥ 200 cells/mm 3 , were consecutively enrolled at the outpatient clinic of Hospital de Clínicas de Porto Alegre, Brazil. Exclusion criteria were chronic kidney disease, pregnancy and known hepatic disease. Renal function was assessed by the Chronic Kidney Disease Epidemiology Collaboration equation. Mild decrease in renal function was defined as an estimated glomerular filtration rate between 89-60 mL/min/1.73m 2 , for a period of at least 3 months. Results: From the total of 213 enrolled volunteers, 193 were included in the final analysis. The mean age was 41.5 years, 102 were men (52.6%), and 156 (80.4%) were euro-descendants. Mild renal decline was diagnosed in 33.5% of the patients. Every other year of life (RR=1.05, 95%CI 1.03-1.06, p<0.001) and being euro-descendant (RR=1.94; 95%CI 1.07-3.78; p=0.049) were associated to mild decreases, whereas high body mass index (BMI) (RR=1.04, 95% CI 1.013-1007, p<0,001) was associated to normal function. Conclusions: Mild decrease in renal function was extremely common and more than expected in our cohort (33.5%) which deserves further attention while assisting HIV-positive individuals. J o urnal o f A ID S & Cli n ic a l R es earc h