Fig. 1From: A comparative performance analysis of the International Classification of Functioning, Disability and Health and the Item-Perspective Classification framework for classifying the content of patient reported outcome measuresJuxtaposition of the IPC and ICF frameworks. The IPC framework classifies multiple attributes of item content including: appraisal types, concept domains and concept relations; although the description of conceptual content achieved is only at a 'general' level. The ICF framework is used solely to classify concepts contained within items, and the definition of concepts achieved may be highly specificBack to article page