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Table 2 Test-retest reliability for physical environmental factors, transportation, and physical activity using percent agree, weighted kappa coefficients, or intraclass correlation coefficients (ICC) with 95% confidence intervals (CI)

From: Girls' perception of physical environmental factors and transportation: reliability and association with physical activity and active transport to school

  Overall Grade
  (n = 480) 6th (n = 252) 8th (n = 228)
Survey Item(s) % Agree Kappa 95% CI % Agree Kappa 95% CI % Agree Kappa 95% CI
Safety of Environment          
Safe walk/jog 59 0.52 (0.45, 0.58) 60 0.53 (0.43, 0.62) 57 0.50 (0.41, 0.59)
Safe ride bike 58 0.49 (0.42, 0.56) 60 0.52 (0.42, 0.61) 56 0.45 (0.36, 0.55)
Seen by others 51 0.37 (0.30, 0.44) 49 0.34 (0.23, 0.44) 53 0.40 (0.31, 0.50)
Traffic 48 0.38 (0.31, 0.45) 48 0.36 (0.26, 0.47) 49 0.40 (0.31, 0.49)
Crime in neighborhood 61 0.46 (0.39, 0.53) 61 0.44 (0.33, 0.54) 60 0.48 (0.38, 0.58)
See others playing 51 0.47 (0.41, 0.54) 50 0.45 (0.36, 0.55) 52 0.50 (0.41, 0.59)
Loose dogs 46 0.40 (0.33, 0.46) 43 0.34 (0.25, 0.43) 49 0.45 (0.36, 0.55)
Lighting 46 0.48 (0.42, 0.54) 48 0.49 (0.40, 0.57) 43 0.45 (0.37, 0.54)
Aesthetics of Environment          
Trees 45 0.37 (0.31, 0.44) 39 0.31 (0.22, 0.41) 50 0.42 (0.33, 0.51)
Things to look at 44 0.39 (0.33, 0.45) 48 0.44 (0.35, 0.53) 39 0.33 (0.24, 0.42)
Smells 54 0.38 (0.31, 0.45) 54 0.36 (0.26, 0.47) 54 0.39 (0.29, 0.49)
Garbage 40 0.31 (0.24, 0.38) 39 0.32 (0.23, 0.42) 42 0.30 (0.20, 0.40)
Facilities Near Home          
Equipment 47 0.42 (0.36, 0.48) 49 0.43 (0.34, 0.51) 44 0.39 (0.30, 0.49)
Sidewalks 59 0.58 (0.52, 0.64) 58 0.55 (0.46, 0.64) 61 0.62 (0.54, 0.71)
Trails 47 0.47 (0.41, 0.53) 43 0.42 (0.33, 0.51) 50 0.51 (0.43, 0.60)
*Number of facilities near home   0.78 (0.74, 0.82)   0.81 (0.75, 0.85)   0.75 (0.69, 0.81)
*Number of facilities near home/go there   0.78 (0.74, 0.82)   0.82 (0.77, 0.86)   0.74 (0.67, 0.80)
Transportation          
Destinations 46 0.41 (0.35, 0.48) 46 0.36 (0.27, 0.45) 47 0.46 (0.37, 0.55)
Parents worry 40 0.34 (0.28, 0.41) 36 0.28 (0.19, 0.37) 44 0.40 (0.30, 0.49)
Parents let me walk 54 0.55 (0.49, 0.61) 51 0.52 (0.43, 0.60) 57 0.58 (0.50, 0.66)
Parents let me bike 56 0.52 (0.45, 0.58) 52 0.46 (0.37, 0.55) 60 0.57 (0.48, 0.65)
Parents public transportation 50 0.49 (0.43, 0.55) 50 0.48 (0.39, 0.57) 49 0.49 (0.40, 0.58)
Walk to transit 48 0.48 (0.41, 0.54) 46 0.41 (0.32, 0.51) 51 0.54 (0.46, 0.62)
Get home 62 0.38 (0.31, 0.46) 57 0.30 (0.19, 0.42) 64 0.45 (0.35, 0.55)
Get there 59 0.44 (0.37, 0.51) 59 0.45 (0.35, 0.54) 59 0.43 (0.32, 0.53)
Get home afterwards 56 0.41 (0.34, 0.48) 53 0.39 (0.29, 0.50) 58 0.42 (0.32, 0.52)
Physical Activity          
*Physical activity score   0.72 (0.67, 0.76)   0.73 (0.66, 0.78)   0.68 (0.60, 0.74)
Days bike/walked/skated to school 74 0.60 (0.52, 0.67) 77 0.64 (0.55, 0.73) 72 0.55 (0.44, 0.66)
  1. *Indicates that ICC used (so percent agreement not calculated), otherwise weighted kappas are used.