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