Journal article
Assessment of lifetime cumulative sun exposure using a self-administered questionnaire: Reliability of two approaches
Cancer Epidemiology Biomarkers and Prevention, Vol.18(2), pp.464-471
2009
Abstract
Few studies have evaluated the reliability of lifetime sun exposure estimated from inquiring about the number of hours people spent outdoors in a given period on a typical weekday or weekend day (the time-based approach). Some investigations have suggested that women have a particularly difficult task in estimating time outdoors in adulthood due to their family and occupational roles. We hypothesized that people might gain additional memory cues and estimate lifetime hours spent outdoors more reliably if asked about time spent outdoors according to specific activities (an activity-based approach). Using self-administered, mailed questionnaires, test-retest responses to time-based and to activity-based approaches were evaluated in 124 volunteer radiologic technologist participants from the United States: 64 females and 60 males 48 to 80 years of age. Intraclass correlation coefficients (ICC) were used to evaluate the test-retest reliability of average number of hours spent outdoors in the summer estimated for each approach. We tested the differences between the two ICCs, corresponding to each approach, using a t test with the variance of the difference estimated by the jackknife method. During childhood and adolescence, the two approaches gave similar ICCs for average numbers of hours spent outdoors in the summer. By contrast, compared with the time-based approach, the activity-based approach showed significantly higher ICCs during adult ages (0.69 versus 0.43, P = 0.003) and over the lifetime (0.69 versus 0.52, P = 0.05); the higher ICCs for the activity-based questionnaire were primarily derived from the results for females. Research is needed to further improve the activity-based questionnaire approach for long-term sun exposure assessment. Copyright © 2009 American Association for Cancer Research.
Details
- Title
- Assessment of lifetime cumulative sun exposure using a self-administered questionnaire: Reliability of two approaches
- Authors
- C L Yu (Author) - National Cancer Institute, United StatesY Li (Author) - National Cancer Institute, United StatesD M Freedman (Author) - National Cancer Institute, United StatesT R Fears (Author) - National Cancer Institute, United StatesR Kwok (Author) - RTI International, United StatesG Chodick (Author) - Maccabi Healthcare Services, IsraelB Alexander (Author) - University of Minnesota, United StatesMichael G Kimlin (Author) - Queensland University of TechnologyA Kricker (Author) - University of SydneyB K Armstrong (Author) - University of SydneyM S Linet (Author) - National Cancer Institute, United States
- Publication details
- Cancer Epidemiology Biomarkers and Prevention, Vol.18(2), pp.464-471
- Publisher
- American Association for Cancer Research
- Date published
- 2009
- DOI
- 10.1158/1055-9965.EPI-08-0894
- ISSN
- 1055-9965; 1055-9965
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy
- Language
- English
- Record Identifier
- 99449280502621
- Output Type
- Journal article
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