Standardization of dental patient-reported outcomes measurement using OHIP-5 – Validation of "recommendations for use and scoring of oral health impact profile versions"

Background: Recently, “Recommendations for use and scoring of Oral Health Impact Profile versions” (here abbreviated as Recommendations Project) were proposed by an international group of oral health researchers to standardize assessment of perceived oral health. They recommended a four-dimensional measurement approach consisting of Oral Function, Orofacial Pain, Orofacial Appearance, and Psychosocial Impact as the set of dental patient-reported outcomes to be measured with the 5-item Oral Health Impact Profile (OHIP-5). Aim: This study aimed to validate the “Recommendations for use and scoring of Oral Health Impact Profile versions” by replicating the findings they are based on. Methods: OHIP data came from the “Dimensions of OHRQoL Project.” Its Validation Sample (5,022 prosthodontic patients and general population subjects) as well as its Additional Sample (N = 583 prosthodontic patients and general population subjects) were used. Validation of the Recommendations Project's findings was performed in two steps. First, correlations among OHIP versions presented in the Recommendations Project were replicated in the Validation Sample. Second, participants of the Additional Sample were subjected to a hypothetical treatment program that assigned two treatments to them according to their level of perceived oral health impact using OHIP versions. The performance of abbreviated OHIP versions was evaluated. Results: The high correlations among summary scores of 5-, 14-, 19-, and 49-item OHIP versions (r = 0.91-0.98), found in the Recommendations Project, were replicated. All short OHIP versions performed similarly when classifying participants for a hypothetical tailored treatment program. Conclusions: Findings reported in “Recommendations for use and scoring of Oral Health Impact Profile versions” were validated, thus supporting the feasibility of a standardized assessment of perceived oral health in all settings across all oral diseases. Psychometrically solid and practical assessment can be performed with OHIP-5.