Library Open Repository

Validity and reliability of adult recall of past sun exposure in a case-control study of Multiple Sclerosis

Downloads

Downloads per month over past year

van der Mei, IAF and Blizzard, CL and Ponsonby, AL and Dwyer, T (2006) Validity and reliability of adult recall of past sun exposure in a case-control study of Multiple Sclerosis. Cancer Epidemiology, Biomarkers & Prevention, 15 (8). pp. 1538-1544.

[img] PDF
van_der_Mei_CancerEp_Biomarkers_2006.PDF | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

Objective: Measurement of past sun exposure through recall by adults has the potential for measurement error. We aimed to investigate aspects of validity and reliability of self-reported past sun exposure. Methods: A population-based case-control study was conducted in Tasmania, on 136 cases with MS and 272 age and sex-matched community controls. Repeat interviews on 52 cases and 52 controls were done on average 11 weeks after the initial interview. Sun exposure was assessed by questionnaire and lifetime calendar. Other measurements included serum 25(OH)D, actinic damage, and skin phenotype. Results: There was an association between recent sun exposure and serum vitamin D (Time in the sun: r=0.22, p<0.01; Activities outside: r=0.31, p<0.01 for controls), and between lifetime sun exposure and actinic damage (correlation between 0.34 (p<0.01) and 0.17 (p=0.01) for controls). The test-retest weighted kappa statistic of self-reported sun exposure ranged from 0.43 to 0.74. Recall of childhood/adolescent sun exposure by standardised questioning was no less reproducible than recall of recent adult sun exposure, and no less reliable when made with the calendar method. Comparing the questionnaire and calendar method, the measures of childhood/adolescent sun exposure had a similar predictive validity for multiple sclerosis. Conclusions: The results of this study provide further evidence that adults are able to recall past sun exposure with demonstrated validity and reliability and present information about the possible reasons for the good reliability of recalled sun exposure measures.

Item Type: Article
Keywords: validity, reliability, sun exposure, skin type, actinic damage, 25(OH)D, self-report
Journal or Publication Title: Cancer Epidemiology, Biomarkers & Prevention
Page Range: pp. 1538-1544
Identification Number - DOI: 10.1158/1055-9965.EPI-05-0969
Additional Information: © 2006 American Association for Cancer Research The definitive version is available at http://cebp.aacrjournals.org/cgi/content/abstract/15/8/1538
Date Deposited: 11 Apr 2007
Last Modified: 18 Nov 2014 03:13
URI: http://eprints.utas.edu.au/id/eprint/888
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page