199931 Test-retest Reliability of a Questionnaire for the Korea Youth Risk Behavior Web-based Survey

Sunday, November 8, 2009

Jisuk Bae , Department of Preventive Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
Hyojee Joung , Seoul National University Schoool of Public Health, Seoul, South Korea
Jong-Yeon Kim , Department of Preventive Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
Kyoung Nam Kwon , Seoul National University Schoool of Public Health, Seoul, South Korea
Younjung Kim , Korea Centers for Disease Control & Prevention, Seoul, South Korea
Soon-Woo Park , Department of Preventive Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
Background: A web-based survey has been conducted annually since 2005 to assess the prevalence of adolescent health risk behaviors among middle and high school students nationwide in Korea. The aim of this study was to evaluate the test-retest reliability of the Korea Youth Risk Behavior Web-based Survey (KYRBWS) questionnaire.

Methods: A convenience sample of 2,298 middle and high school students participated in self-administered web-based questionnaire surveys twice approximately 2 weeks apart in 2008. Percent agreement, kappa statistics, and prevalence rates at the first and the second surveys were computed for the core subset of 39 self-reported health risk behavior indices of the KYRBWS.

Results: Among 39 health risk behavior indices, 7 indices had kappas above 0.81 and 10 indices had kappas below 0.60. Based on nonoverlapping 95% confidence intervals, 3 indices had significantly different prevalence rates at the first and the second surveys. The assessment of reliability by gender revealed that there were no significantly different reliability estimates between male and female students except for 1 index. In the subgroup analyses by school, 2 indices had significantly different reliability estimates between middle and high school students.

Conclusion: This study demonstrated that the reliability estimates for the KYRBWS questionnaire were varied, but generally reliable over time. The indices with low reliability estimates need to be further evaluated in order to determine whether they should be modified or deleted from future versions of the KYRBWS.

Learning Objectives:
To evaluate the test-retest reliability of the Korea Youth Risk Behavior Web-based Survey questionnaire

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I have been involved in epidemiologic research.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.

See more of: Maternal, Infant, Child, and Adolescent Epidemiology Poster Session
See more of: Epidemiology