ArticleHealth and quality of life outcomes2020
Rasch analysis of the long-term conditions questionnaire (LTCQ) and development of a short-form (LTCQ-8).
Article in Health and quality of life outcomes, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.
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Who cites it
10 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Measuring treatment burden related to general practice in patients with multimorbidity: development and validation of a PROM.Family medicine and community health · 2025Pooled it
- Psychometric properties, and cultural appropriateness, of patient reported outcome measures for use in primary healthcare: a scoping review.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2025Article
- Prevalence of dementia risk factors in the Oxford Brain Health Clinic.Scientific reports · 2025Article
- Application of the PAPERS Grading Criteria Within a Rapid Evidence Review to Determine the Psychometric and Pragmatic Properties of Patient Empowerment Tools.Journal of patient experience · 2024Article
- Living well while providing support: validation of LTCQ-Carer for assessing informal carers' quality of life.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2023Article
- Oxford brain health clinic: protocol and research database.BMJ open · 2023Article
- Article
- Development of a questionnaire on nutritional knowledge for the obese hospitalized patient: the NUTRIKOB questionnaire.Frontiers in nutrition · 2023Article
- Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditions.Health expectations : an international journal of public participation in health care and health policy · 2021Observational
- Use of the Long-Term Conditions Questionnaire (LTCQ) for monitoring health-related quality of life in people affected by cognitive impairment including dementia: pilot study in UK memory clinic services.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2021Article
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Authors and funding
7 authors.
Funding
Abstract
backgroundThe aim of the current study was to evaluate the structural validity of the 20-item long-term conditions questionnaire (LTCQ) and to explore a potential short-form version of the scale using Rasch analysis.
methodsData were collected through postal surveys (February 2016-January 2017) from a sample of 1,211 participants diagnosed with at least one long-term condition (LTC). Identified participants were invited through either local authorities for a social care cohort (n = 294) or primary care practices for a health care cohort (n = 917). Participants were mailed a survey, including the LTCQ, demographic questions, a comorbidities measure, and other validated outcome measures. Respondents were invited to complete a follow-up survey including the LTCQ for assessment of reproducibility.
resultsThe main assumptions of the Rasch model from the LTCQ were fulfilled, although infit and outfit indices indicated some items showed misfit. Misfitted items, items that did not have a preceding set or showed some local dependence were removed one at a time, with the remaining candidate items to form an 8-item short version, the LTCQ-8. The Rasch model for the LTCQ-8 explained 64% variance and had a reliability estimate greater than 0.80. Several items in the LTCQ showed uniform differential item function (DIF) in relation to the number of reported LTCs, age, cohort and type of LTCs, but fewer items exhibited DIF in the LTCQ-8. Spearman's rho correlations between the LTCQ and the LTCQ-8 were strong across the total sample and various subgroups. Correlations between the LTCQ-8 and all reference measures were moderate to strong, and comparable to correlations found between the LTCQ and these measures.
conclusionsThe LTCQ measures a unidimensional construct, and it is therefore acceptable to use a summed total score. The LTCQ-8 also met the assumption of unidimensionality and had comparable construct validity with the LTCQ. Additional validation is required in an independent sample.
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