scholarly journals Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish‐speaking populations with long‐term conditions

2021 ◽  
Author(s):  
Carmen Rodriguez‐Blazquez ◽  
Maria João Forjaz ◽  
Alba Ayala ◽  
Mari Carmen Portillo ◽  
Leire Ambrosio ◽  
...  
Keyword(s):  
Chronic Illness ◽  
Rasch Analysis ◽  
Test Theory ◽  
Long Term Conditions ◽  
Spanish Speaking ◽  
Classic Test Theory

scholarly journals Retinal imaging as a source of biomarkers for diagnosis, characterization and prognosis of chronic illness or long-term conditions

2014 ◽  
Vol 87 (1040) ◽  
pp. 20130832 ◽  
Author(s):  
T J MacGillivray ◽  
E Trucco ◽  
J R Cameron ◽  
B Dhillon ◽  
J G Houston ◽  
...  
Keyword(s):  
Chronic Illness ◽  
Retinal Imaging ◽  
Long Term Conditions

Book Review: Managing Long-term Conditions and Chronic Illness in Primary Care. S Newman, J Carrier

2009 ◽  
Vol 5 (4) ◽  
pp. 318-318
Author(s):  
Emma Funnell
Keyword(s):  
Primary Care ◽  
Chronic Illness ◽  
Long Term Conditions

scholarly journals Rasch analysis of the long-term conditions questionnaire (LTCQ) and development of a short-form (LTCQ-8)

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Laurie Batchelder ◽  
Diane Fox ◽  
Caroline M. Potter ◽  
Michele Peters ◽  
Karen Jones ◽  
...  
Keyword(s):  
Rasch Model ◽  
Rasch Analysis ◽  
Short Form ◽  
Total Sample ◽  
Short Version ◽  
Long Term Conditions ◽  
Age Cohort ◽  
Primary Care Practices ◽  
The Rasch Model

Abstract Background The 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. Methods Data 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. Results The 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. Conclusions The 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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