ArticleOsteoarthritis and cartilage2012
Rasch analysis of the intermittent and constant osteoarthritis pain (ICOAP) scale.
Article in Osteoarthritis and cartilage, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Home-based pre-surgical psychological intervention for knee osteoarthritis (HAPPiKNEES): a feasibility randomized controlled trial.Clinical rehabilitation · 2018Trial
- Trial
- Stromal cell-based injection therapies for the treatment of knee osteoarthritis: A systematic review of level I randomized controlled trials.Osteoarthritis and cartilage open · 2025Article
- The Natural History of Knee Osteoarthritis Pain Experience and Risk Profiles.The journal of pain · 2023Observational
- Less pain reported 5 years after cementless compared to cemented unicompartmental knee replacement: an analysis of pain, neuropathy, and co-morbidity scores.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- Medio-dorsal thalamic dysconnectivity in chronic knee pain: A possible mechanism for negative affect and pain comorbidity.The European journal of neuroscience · 2023Article
- Article
- The Central Aspects of Pain in the Knee (CAP-Knee) questionnaire; a mixed-methods study of a self-report instrument for assessing central mechanisms in people with knee pain.Osteoarthritis and cartilage · 2021Observational
- Determination of Pain Phenotypes in Knee Osteoarthritis Using Latent Profile Analysis.Pain medicine (Malden, Mass.) · 2021Article
- Article
- Reliability and responsiveness of measures of pain in people with osteoarthritis of the knee: a psychometric evaluation.Disability and rehabilitation · 2017Article
- Pain phenotype in patients with knee osteoarthritis: classification and measurement properties of painDETECT and self-report Leeds assessment of neuropathic symptoms and signs scale in a cross-sectional study.Arthritis care & research · 2015Article
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4 authors.
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Abstract
objectivesThe intermittent and constant osteoarthritis pain (ICOAP) questionnaire was developed to assess two forms of pain reported by people with osteoarthritis: intermittent and constant pain. Studies examining its measurement qualities have provided some support for its use as separate and total scales. However, it has not been previously evaluated using Rasch analysis. The current study examined the fit between data obtained from the ICOAP questionnaire and the Rasch model to determine whether it meets the requirements of interval-level measurement.
designICOAP responses from 175 participants with knee osteoarthritis were collected in a cross-sectional questionnaire study. Participants were recruited from hospital clinics and a group who had taken part in previous research. The questionnaires were completed at home and returned by pre-paid envelope and the data were analysed using RUMM2020.
resultsFit to the Rasch model was achieved for both the constant and intermittent subscales following removal of a small number of items. The Total scale initially resulted in substantial misfit to the model, but fit was improved by removing four items that misfit the model. However, several participants presented with high fit residuals, which is consistent with misfit.
conclusionsThe results support the use of Constant and Intermittent subscales as unidimensional measures of pain. The Total scale can be adapted to improve fit to the Rasch model, but there are concerns over participant misfit.
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