Measuring patient anxiety in primary care: Rasch analysis of the 6-item Spielberger State Anxiety Scale

Court, Helen, Greenland, Katy and Margrain, Thomas Hengist 2010. Measuring patient anxiety in primary care: Rasch analysis of the 6-item Spielberger State Anxiety Scale. Value In Health 13 (6) , pp. 813-819. 10.1111/j.1524-4733.2010.00758.x

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Abstract

Objectives The 6-item Spielberger State Anxiety Scale has been used as a replacement of the original version in many health-care studies. The purpose of this study was to evaluate the measurement properties of the shortened 6-item Spielberger State Anxiety Scale using Rasch analysis in general medical practice patients (N = 297). Methods Participants (aged 16 years or above) were recruited on a consecutive basis from three general medical practices. Prior to their appointment, participants were asked to complete a 6-item Spielberger State Anxiety Scale. Results The results of the study showed that the scale is unidimentional, and each item measures a different level of patient anxiety. The rating scale operated well and item and person reliability was good. Furthermore, principal-components analysis of the residuals confirmed the scale measures a unitary concept. A scoring key was generated to allow conversion of raw scores to a continuous measurement. Conclusion The 6-item Spielberger State Anxiety Scale is shorter than the original version and has good psychometric properties. This would suggest the scale is a valid alternative to the full version for use in primary health-care practice and research.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Optometry and Vision Sciences Social Sciences (Includes Criminology and Education)
Subjects:	R Medicine > RA Public aspects of medicine R Medicine > RE Ophthalmology
Uncontrolled Keywords:	anxiety; primary health care; questionnaire; Rasch analysis
Publisher:	Blackwell Publishing
ISSN:	1098-3015
Last Modified:	15 Dec 2017 09:26
URI:	http://orca-mwe.cf.ac.uk/id/eprint/23947

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