This study aimed to evaluate the longitudinal effects of a nursing-documentation intervention on the quantity and quality of the nursing documentation in a sample of patient records at a university hospital in Stockholm, Sweden. In this quasi-experimental longitudinal study, two hospital wards participated in a 2-year intervention and a third ward was used for comparison. The intervention consisted of organizational changes and education regarding nursing documentation in accordance with the VIPS model, a model designed to structure nursing documentation. To evaluate the effect, patient records were audited at three different time points: before the intervention, directly after the intervention and 3 years after the intervention. A total of 269 patient records were used. The findings showed a significant score increase in quantity as well as in quality of the nursing documentation, in the intervention wards directly after the intervention, as compared with those from the comparison ward. The results suggests that a comprehensive intervention based on the VIPS model and including organizational support for registered nurses (RN) may improve nursing documentation in an acute care hospital setting.