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Table 5 Reliability and validity estimates for physical activity and media environment items from the HHS

From: Reliability and validity of the Healthy Home Survey: A tool to measure factors within homes hypothesized to relate to overweight in children

  Reliability Validity
  n % Agree Kappa (95% CI) PABAK1 Ppos Pneg n % Agree Kappa (95% CI) PABAK1 SEN SPEC
Physical activity environment             
Outdoor recreation facilities 45 91.1 0.66 (0.36–0.97)   0.95 0.71       
Indoor recreation centers 45 95.6 0.88 (0.72–1.00)   0.91 0.97       
Parent exercise (past month) 45 95.6 0.73 (0.36–1.00)   0.98 0.75       
Yard 45 100.0 1.00 1.00 1.00 1.00 79 98.7 0.85 (0.56–1.00) 0.98 1.00 0.75
Yard Size 43 83.7 0.73 (0.54–0.92)w     75 66.7 0.49 (0.31–0.66)w    
Share Yard 43 97.7 0.85 (0.55–1.00) 0.95 0.86 0.99 75 96.0 0.71 (0.40–1.00) 0.92 1.00 0.96
Play equipment in Yard 43 95.4 0.90 (0.78–1.00)   0.94 0.96 74 90.5 0.81 (0.67–0.94)   0.98 0.82
Bike or riding toy 45 91.1 0.29 (-0.21–0.79) 0.82 0.95 0.33 78 96.2 -0.02 (-0.04–0.01) 0.92 0.99 0.00
Adequate Play Space Inside 45 77.8 0.69 (0.50–0.89)w     79 43.0 0.06 (-0.11–0.22)w    
Media environment             
Number of TVs 45 100.0 1.00w     78 84.6 0.88 (0.82–0.95)w    
Number of DVD players 45 75.6 0.77 (0.64–0.90)w     79 59.5 0.56 (0.43–0.70)w    
Number of computers 45 93.3 0.92 (0.84–1.00)w     79 64.6 0.58 (0.45–0.72)w    
Number of video games consoles 45 88.9 0.84 (0.73–0.95)w     79 73.4 0.64 (0.55–0.74)w    
Number of DVDs 44 75.0 0.56 (0.33–0.80)w     79 64.6 0.60 (0.46–0.75)w    
Cable TV 45 100.0 1.00   1.00 1.00 79 98.7 0.96 (0.89–1.00)   1.00 0.94
TV in child's bedroom 45 100.0 1.00   1.00 1.00 79 96.2 0.88 (0.75–1.00)   0.88 0.99
Computer in child's bedroom 45 100.0 1.00 1.00 1.00 1.00 79 92.4 0.53 (0.21–0.86) 0.85 0.44 0.99
Video game in child's bedroom 42 97.6 0.84 (0.55–1.00) 0.95 0.86 0.99 76 94.7 0.72 (0.47–0.98) 0.90 0.60 1.00
  1. wWeighted Kappa (for items with ≥3 response categories); 1 Adjusted Kappa (PABAK) used if prevalence ≥85%; Ppos = proportion of positive agreement; Pneg = proportion of negative agreement; SEN = sensitivity (proportion of those reporting YES confirmed as YES by the home visit); SPE = specificity (proportion of those reporting NO confirmed as NO by the home visit); CI = confidence interval