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Table 3 Tracking coefficients over 20 months for potential psychosocial and social-environmental correlates of physical activity

From: Stability and change in potential correlates of physical activity and association with pubertal status among Norwegian children in the transition between childhood and adolescence

   Girls (419a) Boys (466a)
  r r' r r'
  T1 T2 T1 T2 T1 T2 T1 T2
Enjoyment of PA BL 0.52 0.37 0.74 0.53 0.55 0.45 0.78 0.64
  T1 1 0.45 1 0.64 1 0.52 1 0.74
Self-efficacy BL 0.55 0.45 0.81 0.66 0.56 0.52 0.82 0.76
  T1 1 0.49 1 0.72 1 0.53 1 0.78
Perceived parental BL 0.54 0.50 0.77 0.71 0.51 0.47 0.73 0.67
support T1 1 0.57 1 0.81 1 0.49 1 0.70
Perceived support from BL 0.37 0.30 0.63 0.51 0.34 0.33 0.58 0.56
teachers T1 1 0.35 1 0.59 1 0.38 1 0.64
Perceived support from BL NA 0.36 NA 0.47 NA 0.43 NA 0.56
friends T1 1 NA 1 NA 1 NA 1 NA
Perceived environmental BL NA 0.30 NA 0.46 NA 0.42 NA 0.65
opportunities T1 1 NA 1 NA 1 NA 1 NA
Perceived social inclusionb BL NA 0.37    NA 0.40   
  T1 1 NA    1 NA   
  1. All Spearman’s correlation coefficients are significant at 0.01 level.
  2. r’ = coefficient corrected for attenuation using test-retest values. Test-retest was assumed to be the same at the three time points.
  3. NA = not assessed at T1.
  4. aN varies slightly between variables.
  5. b measure not included in test-retest, therefore r’ not computed.