[Possible decrease in the prevalence of nosocomial infections after the accreditation process in the region of Northern Jutland, Denmark].

All hospitals in the region of Northern Jutland, Denmark, were accredited in 2011 according to standards defined by the Danish Healthcare Quality Programme. A retrospective review was performed analysing the prevalence of nosocomial infections before and during the accreditation process. The accreditation process was associated with a decreased prevalence of selected nosocomial infections compared with results from a period immediate prior to the process. However, the findings were not statistically significant when the results were adjusted for patient-time in the hospitals.