"To do or not to do": Treatment fidelity to a complex training intervention

When a complex intervention is examined it is viewed necessary to perform a qualitative process evaluation paired with an outcome evaluation. The purpose is to provide insights into the fidelity of the experimental intervention and thereby strengthen the validity of the study. In "Recovery after hip fracture" (the HIPFRAC study), the effect of a complex functional training intervention was examined by a randomized controlled trial design. The training was initiated by the physiotherapist and performed by the nurses/nurse assistants (NAs), as part of their daily, habitual routine when the patients with hip fracture were in a short-term stay after discharge from hospital. The aim of the present process evaluation was to explore how contextual factors facilitated or complicated the nurses'/NAs' fidelity to the experimental intervention in the HIPFRAC study.

A descriptive thematic analysis was used. Data was collected through semi-structured in-depth interviews with three nurses and three NAs working with the HIPFRAC patients in a short-term stay. The interviews were transcribed and analyzed.

Six subthemes, two main themes and one overall theme were identified. The overall theme was: Barriers affecting the implementation process. The main themes related to the barriers were identified as follows: (1) Attitudes within the nurses/NAs and (2) Structural factors.

The nurses/NAs in the short-term stay experienced contextual barriers, which contributed to complicate fidelity to the experimental intervention. There is a need of further research to investigate whether increased physiotherapy resources at short-term stay will improve the level of physical activity among the patients with hip fracture.