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Table 3 Test-retest reliability (intraclass correlation coefficients - ICC); percent agreement and weighted Kappa of quintiles of time spent in MPA, VPA and MVPA, measured by V-APARQ assessments in a sample of 146 junior high school students

From: Validity and reliability of a physical activity questionnaire for Vietnamese adolescents

  ICC Percent agreement** Weighted Kappa** (95 % CI)
  All Boys Girls All Boys Girls All Boys Girls
  (n = 146) (n = 69) (n = 77) (n = 146) (n = 69) (n = 77) (n = 146) (n = 69) (n = 77)
MPA 0.37* 0.45* 0.30* 83.4 83.8 82.8 0.33 0.34 0.33
(0.28, 0.35) (0.25, 0.50) (0.29, 0.40)
VPA 0.62* 0.65* 0.60* 88.0 87.8 88.2 0.52 0.58 0.45
(0.42, 0.57) (0.43, 0.72) (0.36, 0.58)
MVPA 0.57* 0.70* 0.53* 93.8 91.8 92.4 0.75 0.78 0.70
        (0.74, 0.78) (0.32, 0.85) (0.30, 0.74)
  1. * The % agreement and Kappa are based on quintiles.