Objectives: To study infection rates in patients undergoing total hip arthroplasty, comparing elective surgery against intervention due to hip fracture (nonelective), and being related to the quality of life of them, comparing infection sample versus uninfected one.Methods: Longitudinal prospective study of 104 patients older than 65 years who underwent hip replacement between October 2008 and March 2010, in "Consorcio Hospital General Universitario de Valencia". The EuroQol-5D was used for clinical assessment. Results:The infection rate was 2.88% at 6 months follow-up (3 elective surgery infections and no one infection in hip fracture), decreasing the prevalent infection rate to 0% at 12 months. Total hip arthroplasty intervention means an increase quality of life of 0.452 in the patients studied. Conclusion