Background
The recognition of kidney tubular dysfunction (KTD) in subjects treated with tenofovir (TDF) has prompted to include tubular and glomerular function as part of current HIV monitoring in most patients. Although CCR in 24 h urine is the most reliable method to determine GF, practical issues make CG or MDRD estimates more adequate in a daily basis. The correlation between all these methods used to assess GF, and the possible interference of KTD, has not been examined in the HIV population.