Sara Zwier Kuiper

Aim In this study we aimed to assess the responsiveness of the symptom score of the recently developed Patient‐Reported Outcome Measure‐Haemorrhoidal Impact and Satisfaction Score (PROM‐HISS). Furthermore, the minimally relevant difference (MRD) was determined. Method The responsiveness of PROM‐HISS was tested using a criterion‐based (i.e. anchor) and construct‐based (i.e. hypotheses testing) approach. Patients with haemorrhoidal disease (HD) completed the PROM‐HISS before and 1 week after treatment in hospital. A global self‐assessment of change question (SCQ) was administered 1‐week after treatment and functioned as the criterion. The following analyses were performed: (1) correlation between the PROM‐HISS symptom score and the criterion (SCQ) and (2) hypotheses testing. The MRD was determined as change in symptoms of the subgroup reporting ‘somewhat fewer complaints’ on the SCQ. Results Between February and August 2022, 94 patients with grade II–IV HD from three hospitals were included. The correlation between the SCQ and a change on the PROM‐HISS symptom score was 0.595 indicating that an improvement on the SCQ corresponds to an improvement on the PROM‐HISS symptom score. As hypothesized, the mean change in PROM‐HISS scores was significantly different between subgroups of patients based on their SCQ responses. Patients reporting a small change in HD symptoms on the SCQ corresponded to a mean change of 0.3 on the PROM‐HISS symptom score. Conclusion The PROM‐HISS symptom score is a responsive instrument as it identifies change in HD symptoms because of treatment. The estimated MRD of 0.3 can be used to inform clinical research and practice.