Our office will remain closed through Friday, September 18th as we continue to assess the damages caused by Hurricane Sally. ActiGraph team members are working remotely, however shipping delays should be expected at this time. We expect to resume regular business hours on Monday, September 21st. If you need immediate assistance, please contact us by email at firstname.lastname@example.org and we will respond as quickly as possible. Thank you for your continued support.
Reliability and Convergent Validity of the National College Health Risk Behavior Survey Physical Activity Items
- Published on 05/2002
Purpose The purpose of this study was to assess the reliability and convergent validity of the NCHRBS physical activity items.
Methods Forty-five college students (25 females, 20 males) completed the physical activity items twice during the same day, with approximately 2 hours between administrations. In addition, 20 college students (9 females, age: 24.1 ± 3.5 y, BMI: 27.9 ± 6.4; 11 males, age: 24.0 ± 3.2 y, SMI: 26.4 ± 3.9) wore a Computer Science and Applications Inc. Actigraph Monitor (CSA), wore a Dig walker pedometer (DVV7OI), and recorded their daily physical activity in a diary for 7 days At the end of the 7 days, subjects completed the NCHRBS physical activity items.
Results The test-retest intraclass correlation coefficients (ICC) ranged from 0.97-0.99 for the four items. The VPA item was highly correlated with VPA recorded in the activity diary (r = 0.82) and number of days with 20 mins of VPA from the GSA (r = 0.60). The MPA item was moderately correlated with diary MPA (r = 0.66), number of days with 30 mins of MPA from the CSA (r = 0.61), and number of steps (r = 0.49) The FLEX item (r = 0.57) was moderately correlated and the MSE item (r = 0.88) was highly correlated with corresponding activities in the diary.
Conclusion The NCHRBS physical activity items have excellent test-retest reliability and validity indices similar to other self-report physical activity questions.
Medicine & Science in Sports & Exercise