Measuring patient-centredness: a comparison of three observation-based instruments

The aim of this study was to assess the reliability and validity of three d ifferent observation-based measures of patient-centredness. The three face- valid instruments were each applied to the same sample of 55 videotaped GP consultations. Associations were explored with consultation 'input' variabl es (e.g. patient and doctor demographic characteristics, patient health sta tus) and 'process' variables (e.g. consultation length). The three measures demonstrated varying levels of inter-rater reliability. Reliability was pr oportional to training requirements. Differences in construct validity of t he three measures were evident and their concurrent validity was relatively low. Researchers must exercise caution in their choice of measurement meth od because of differences in how the concept of 'patient-centredness' is op erationalised. Greater conceptual specificity and simplification are requir ed for meaningful, reliable measurement. The implications for research, and for assessing the quality of individual doctors' 'interpersonal' care are discussed. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.