| Author; Year; Number of Participants | Study Design | Participants Included |
| Van Welie et al., 2016; [32] n = 164 patients pre-intervention and n = 150 patients post intervention. |
Prospective, uncontrolled, observational study with a pre-intervention and post-intervention measurement. | Inpatients on 18 wards in 3 nursing homes in the North of the Netherlands receiving medication on an observed drug round. |