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Quality issue
Responding to person's health and related needs requires the availability of health information that reflects relevant aspects of a health condition and how this health condition impacts on a person's daily life.
Initial assessment
Health information is routinely collected at different time points by diverse professionals, in different settings for various purposes with varying methods. Consequently, health information is not always comparable, posing a challenge to the regular monitoring of quality.
Choice of solution
The World Health Organization's (WHO) International Classification of Diseases (ICD), International Classification of Functioning, Disability and Health (ICF), and International Classification of Health Interventions (ICHI; under development) are complementary and serve as meaningful reference classifications for comparing data on persons’ health and related interventions across health systems.
Implementation
We developed a systematic approach of translating routinely collected information into a standardized report based on the three WHO reference classifications and the Rehab-Cycle®. Subsequently, we have demonstrated its application using five random case records of individuals attending a rehabilitation program.
Evaluation
All identified concepts were able to be linked to WHO's reference classifications. The ICF served as a tool to standardize information on rehabilitation goals and their achievement. The ICHI served as the basis for reporting the interventions that were documented in the case records, including the intervention targets that were derived from the ICF codes.
Lessons learned
Our experience shows that, it is possible to translate routinely collected information into standardized reports by linking existing narrative records with WHO's reference classifications.
Objective: Functioning is an important outcome to measure in cohort studies. Clear and operational outcomes are needed to judge the quality of a cohort study. This paper outlines guiding principles for reporting functioning in cohort studies and addresses some outstanding issues.
Design: Principles of how to standardize reporting of data from a cohort study on functioning, by deriving scores that are most useful for further statistical analysis and reporting, are outlined. The Swiss Spinal Cord Injury Cohort Study Community Survey serves as a case in point to provide a practical application of these principles.
Methods and Results: Development of reporting scores must be conceptually coherent and metrically sound. The International Classification of Functioning, Disability and Health (ICF) can serve as the frame of reference for this, with its categories serving as reference units for reporting. To derive a score for further statistical analysis and reporting, items measuring a single latent trait must be invariant across groups. The Rasch measurement model is well suited to test these assumptions.
Conclusion: Our approach is a valuable guide for researchers and clinicians, as it fosters comparability of data, strengthens the comprehensiveness of scope, and provides invariant, interval-scaled data for further statistical analyses of functioning.