Development and partial validation of Be-CLIPSS: a classification system for hospital clinical pharmacy activities

Background Documentation of drug related problems (DRPs) and pharmaceutical interventions (PIs) is essential for an objective evaluation of the pharmacist’s contribution to pharmacotherapy. However, in Belgium, a nationally used classification system is not available, prohibiting structured and uniform documentation of DRPs and PIs. Aim To develop and validate a national classification system for in-hospital clinical pharmacy activities, based on literature and field experience, specifically intended for routine registration. Method Based on a literature review, a survey among Belgian hospital pharmacists and a stakeholder focus group, a first version of Be-CLIPSS (Belgian CLInical Pharmacy claSsification System) was developed. Inter-rater reliability of the DRPs and PIs was assessed. Additionally, its usability was reviewed. The system was further refined, followed by a second validation. Results Both the survey and focus group discussion revealed little use of validated DRP and PI classification systems in Belgium, although these were considered highly desirable if practical and minimally time-consuming. The final classification system encompassed seven clinical pharmacy activities, grouped into four activity classes. The inter-rater reliability for the second activity class was substantial for the DRPs (κ = 0.737) and almost perfect for the PIs (κ = 0.872). The interpretability (86.4%), user-friendliness (61.4%), user satisfaction (84.1%), interest for use in daily practice (68.2%) and difficulty in correctly classifying the DRP and PI (31.8%) were assessed. Conclusion Be-CLIPSS, a newly developed and partially validated classification system for DRPs and PIs, was found to be user-friendly, with a good interpretability and user satisfaction, resulting in a high interest for use in daily practice.