Comparison of Self-Reported and Device-Based Measured Physical Activity Using Measures of Stability, Reliability, and Validity in Adults and Children

• DOI: 10.3390/s21082672
• Publication Date: 2021-04-12T09:52:00Z
• Authors: Janis Fiedler; Tobias Eckert; Alexander Burchartz; Alexander Woll; Kathrin Wunsch
• Keywords: Criterion validity

Quantification of physical activity (PA) depends on the type measurement and analysis method making it difficult to compare adherence PA guidelines. Therefore, test-retest reliability, validity, stability for self-reported (i.e., questionnaire diary) device-based measured accelerometry with 10/60 s epochs) was compared in 32 adults children from SMARTFAMILY study examine if differences these tools are systematic. collected during two separate weeks relationship each quality criteria analyzed using Spearman correlation. Results showed highest values questionnaires followed by 10-s 60-s epochs accelerometers. Levels were lowest when diary. Only demonstrated reliable, valid, stable results weeks, yielded mixed diary only a few significant correlations. Overall, higher correlations found moderate than vigorous differed between adults. Since not be systematic, choice should carefully considered anyone working outcomes, especially is parameter interest.