Sensitivity, specificity, and predictive values between the parent telephone interview and home visit
| Sensitivity (95% CI) | Specificity (95% CI) | Positive predictive value (95% CI) | Negative predictive value (95% CI) | |
|---|---|---|---|---|
| Smoke detector on each floor | 56/57 = 0.98 (0.91–1.00) | 0/7 = 0.00 (0.00–0.35) | 56/63 = 0.89 (0.79–0.95) | 0/1 = 0.00 (0.00–0.79) |
| Smoke detector works/battery | 39/50 = 0.78 (0.65–0.87) | 0/6 = 0.00 (0.00–0.39) | 39/45 = 0.87 (0.74–0.94) | 0/11 = 0.00 (0.00–0.26) |
| Own bike helmet | 19/20 = 0.95 (0.76–0.99) | 1/2 = 0.50 (0.09–0.91) | 19/20 = 0.95 (0.76–0.99) | 1/2 = 0.50 (0.09–0.91) |
| Bike helmet fits snugly | 11/14 = 0.85 (0.58–0.96) | 0/1 = 0.00 (0.00–0.79) | 11/12 = 0.92 (0.65–0.96) | 0/2 = 0.00 (0.00–0.66) |
| Car seat type | ||||
| Adult seat belt | 18/20 = 0.88 (0.66–0.97) | 45/45 = 1.00 (0.92–1.00) | 15/15 = 1.00 (0.80–1.00) | 45/47 = 0.96 (0.86–0.99) |
| Booster | 18/20 = 0.90 (0.70–0.97) | 41/42 = 0.97 (0.88–1.00) | 18/19 = 0.95 (0.75–0.99) | 41/43 = 0.95 (0.85–0.99) |
| Forward | 24/25 = 0.96 (0.81–0.99) | 35/37 = 0.95 (0.82–0.99) | 24/26 = 0.92 (0.76–0.98) | 35/36 = 0.97 (0.86–1.00) |
| Hot water ⩽120°F | 6/7 = 0.86 (0.48–0.97) | 2/4 = 0.50 (0.15–0.85) | 6/8 = 0.75 (0.41–0.93) | 2/3 = 0.67 (0.21–0.94) |