Abstract
ObjectivesWe evaluated the psychometric properties of a newly developed self-report questionnaire that aims for a more person-centered approach in primary care for patients with chronic conditions, the Primary Care Functioning Scale (PCFS). Study Design and SettingTo test the measurement properties of the PCFS, we asked patients with diabetes, cardiovascular disease, and chronic pulmonary disease to complete the PCFS questionnaire. The PCFS is entirely based on the International Classification of Functioning, Disability, and Health (ICF), consisting of 52 ICF-related items covering body functions, activities and participation, environmental factors, and personal factors. We analyzed three hypotheses representing different item sets of the 34 ICF-related items that assess the level of functioning (body functions, activities, and participation). We tested for unidimensionality, differential item functioning, reliability, and criterion-related validity. ResultsFive hundred and eighty-two patients completed the questionnaire. The total scores of the polytomous and dichotomized items from the overall set ‘body functions, activities and participation’ demonstrated unidimensionality, good reliability (>0.80), and stability over time without bias from background variables. ConclusionIn sum, the PCFS can be used as a valid and reliable instrument to measure functioning in patients with chronic morbidity in primary care.
Highlights
The management of patients with chronic conditions in the primary health care setting is a well-known challenge
In sum, the Primary Care Functioning Scale (PCFS) can be used as a valid and reliable instrument to measure functioning in patients with chronic morbidity in primary care
Patients who visited the practice for a routine check-up with the practice nurse for diabetes mellitus (DM), chronic obstructive pulmonary disease (COPD)/asthma, or cardiovascular risk management were invited by their practice nurse to participate
Summary
We evaluated the psychometric properties of a newly developed self-report questionnaire that aims for a more personcentered approach in primary care for patients with chronic conditions, the Primary Care Functioning Scale (PCFS)
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