Human waist circumference (WC) is strongly linked to morbidity and mortality associated with many of today's lifestyle diseases. Health organizations and lifestyle assessment programs are commonly using the WC as a predictor of health risks. Knowing one's WC is a primary step in assessing lifestyle diseases. One concern, however, is the accuracy with which WC measurements are taken. This is especially true if individuals are self-measuring their WC. This study attempted to determine the effectiveness of a computer-based tutorial (CBT) in teaching previously untrained individuals to properly measure the circumference of their waist. This is the first study to test the validity of a computer-based method of teaching WC measurement. To test the efficacy of the computer-based multimedia tutorial in teaching WC self-measurement, eighty-three subjects were recruited from the student population at the University of Colorado at Colorado Springs (UCCS). Subjects used the CBT to learn WC self-measurement techniques. Upon completion of the tutorial, each subject attempted to perform WC self-measurement. Subjects' measurements were duplicated by a traditionally trained and experienced tester. Validity of the subjects' measurements was determined by comparing their measurements to those of the experienced tester's. Bland-Altman and box-whisker comparisons revealed an average 1.57 cm bias in the subjects' WC measurements. Bland-Altman bias plots illustrated agreement between the subjects' and experienced tester's measurements. Pearson correlation (r=0.97) showed no significant (p<0.0001) difference between the two groups of measurements. The results of this experiment suggest that the tested CBT is efficacious in teaching waist circumference self-measurement to untrained subjects, as determined by comparison of their measurement results to a traditionally trained and experienced tester's performance. The tested CBT holds the potential to teach the general population ( i.e., nonprofessionals) to properly perform WC self-measurement. The tutorial could be used in the area of health assessment, biomedical education, and scholarly research. The CBT could also be used as a standardized way of instructing individuals in learning WC self-measurement and maintaining this skill.
Key Words: anthropometry, body composition, computer-based tutorial (CBT), measurement, obesity, waist circumference (WC).
|School:||Union Institute and University|
|School Location:||United States -- Ohio|
|Source:||DAI-A 68/12, Dissertation Abstracts International|
|Keywords:||Body composition, Computer-based tutorial, Self-measurement, Waist circumference|
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