The University of Southampton
University of Southampton Institutional Repository

Construct validity of the holistic complementary and alternative medicines questionnaire (HCAMQ)—an investigation using modern psychometric approaches

Record type: Article

The scientific basis of efficacy studies of complementary medicine requires the availability of validated measures. The Holistic Complementary and Alternative Medicine Questionnaire (HCAMQ) is one such measure. This article aimed to examine its construct validity, using a modern psychometric approach. The HCAMQ was completed by 221 patients (mean age 66.8, SD 8.29, 58% females) with chronic stable pain predominantly from a single joint (hip or knee) of mechanical origin, waiting for a hip (40%) or knee (60%) joint replacement, on enrolment in a study investigating the effects of acupuncture and placebo controls. The HCAMQ contains a Holistic Health (HH) Subscale (five items) and a CAM subscale (six items). Validity of the subscales was tested using Cronbach alpha’s, factor analysis, Mokken scaling and Rasch analysis, which did not support the original two-factor structure of the scale. A five-item HH subscale and a four-item CAM subscale (worded in a negative direction) fitted the Rasch model and were unidimensional (chi-square 8.44, P=0.39, PSI=0.69 versus chi-square 17.33, P=0.03, PSI=0.77). Two CAM items (worded in the positive direction) had significant misfit. In conclusion, we have shown that the original two-factor structure of the HCAMQ could not be supported but that two valid shortened subscales can be used, one for HH Beliefs (four-item HH), and the other for CAM Beliefs (four-item CAM). It is recommended that consideration is given to rewording the two discarded positively worded CAM questions to enhance construct validity

Full text not available from this repository.

Citation

Kersten, Paula, White, Peter J. and Tennant, A. (2009) Construct validity of the holistic complementary and alternative medicines questionnaire (HCAMQ)—an investigation using modern psychometric approaches Evidence-based Complementary and Alternative Medicine, pp. 1-8. (doi:10.1093/ecam/nep141).

More information

Published date: 2009
Keywords: acupuncture, health beliefs, outcomes research, rasch analysis

Identifiers

Local EPrints ID: 69358
URI: http://eprints.soton.ac.uk/id/eprint/69358
ISSN: 1741-427X
PURE UUID: e3403d5a-2683-40db-ac2d-fa917ba8585e

Catalogue record

Date deposited: 05 Nov 2009
Last modified: 19 Jul 2017 00:12

Export record

Altmetrics

Contributors

Author: Paula Kersten
Author: Peter J. White
Author: A. Tennant

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×