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Journal ArticleDOI

The Self-Administered Comorbidity Questionnaire: a new method to assess comorbidity for clinical and health services research.

TLDR
The SCQ has modest correlations with a widely used medical record-based comorbidity instrument, and with subsequent health status and utilization, and it will be particularly useful in settings where medical records are unavailable.
Abstract
Objective To develop the Self-Administered Comorbidity Questionnaire (SCQ) and assess its psychometric properties, including the predictive validity of the instrument, as reflected by its association with health status and health care utilization after 1 year. Methods A cross-sectional comparison of the SCQ with a standard, chart abstraction-based measure (Charlson Index) was conducted on 170 inpatients from medical and surgical care units. The association of the SCQ with the chart-based comorbidity instrument and health status (short form 36) was evaluated cross sectionally. The association between these measures and health status and resource utilization was assessed after 1 year. Results The Spearman correlation coefficient for the association between the SCQ and the Charlson Index was 0.32. After restricting each measure to include only comparable items, the correlation between measures was stronger (Spearman r = 0.55). The SCQ had modest associations with measures of resource utilization during the index admission, and with health status and resource utilization after 1 year. Conclusion The SCQ has modest correlations with a widely used medical record-based comorbidity instrument, and with subsequent health status and utilization. This new measure represents an efficient method to assess comorbid conditions in clinical and health services research. It will be particularly useful in settings where medical records are unavailable.

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Citations
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Journal ArticleDOI

Predicting the Outcome of Total Knee Arthroplasty

TL;DR: Patients who have marked functional limitation, severe pain, low mental health score, and other comorbid conditions before total knee arthroplasty are more likely to have a worse outcome at one year and two years postoperatively.
Journal ArticleDOI

The Measurement of Multiple Chronic Diseases—A Systematic Review on Existing Multimorbidity Indices

TL;DR: The systematic literature further emphasis the heterogeneity of existing multimorbidity indices, however, one important similarity is that the focus is on diseases with a high prevalence and a severe impact on affected individuals.
Journal ArticleDOI

Why Summary Comorbidity Measures Such As the Charlson Comorbidity Index and Elixhauser Score Work.

TL;DR: A mathematical proof is devised that found that the comorbidity summary measures are appropriate prognostic or adjustment mechanisms in survival analyses and the theoretical justification that validates the use of such scores under many conditions is provided.
Journal ArticleDOI

Measures of multimorbidity and morbidity burden for use in primary care and community settings: A systematic review and guide

TL;DR: The measures most commonly used in primary care and community settings are disease counts, Charlson index, ACG System, CIRS, CDS, and DUSOI.
Journal ArticleDOI

The development and psychometric validation of the central sensitization inventory.

TL;DR: 2 studies demonstrate the psychometric strength, clinical utility, and the initial construct validity of the CSI in evaluating CS‐related clinical symptoms in chronic pain populations.
References
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Journal ArticleDOI

The measurement of observer agreement for categorical data

TL;DR: A general statistical methodology for the analysis of multivariate categorical data arising from observer reliability studies is presented and tests for interobserver bias are presented in terms of first-order marginal homogeneity and measures of interob server agreement are developed as generalized kappa-type statistics.
Journal ArticleDOI

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation☆

TL;DR: The method of classifying comorbidity provides a simple, readily applicable and valid method of estimating risk of death fromComorbid disease for use in longitudinal studies and further work in larger populations is still required to refine the approach.
Journal ArticleDOI

The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection.

John E. Ware, +1 more
- 01 Jun 1992 - 
TL;DR: A 36-item short-form survey designed for use in clinical practice and research, health policy evaluations, and general population surveys to survey health status in the Medical Outcomes Study is constructed.
Journal ArticleDOI

Intraclass correlations: uses in assessing rater reliability.

TL;DR: In this article, the authors present guidelines for choosing among six different forms of the intraclass correlation for reliability studies in which n target are rated by k judges, and the confidence intervals for each of the forms are reviewed.
Journal ArticleDOI

Adapting a clinical comorbidity index for use with ICD-9-CM administrative databases

TL;DR: It is concluded that the adapted comorbidity index will be useful in studies of disease outcome and resource use employing administrative databases.
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