Design and setting
This study was a non-randomised quasi-experimental study conducted at Horsens Regional Hospital from 1 February 2017 to 31 December 2018. Horsens is a public hospital in the Central Denmark Region with 21,746 acute hospital admissions in 2017 and a total of 240 beds. The hospital receives patients primarily from the following four municipalities: Odder, Hedensted, Skanderborg and Horsens. The total number of inhabitants in 2017 was 218,286. Of these, 15,907 (7.3%) were older than 75 years, and of those, 57% were women. The share of inhabitants ≥ 75 years old was 7.1% in Horsens municipality, 6.4% in Skanderborg, 8.1% in Hedensted and 8.9% in Odder [