Mean values (95% CI) for daytime and night-time usage
| Daytime | Night-time | |
| Sensitivity (recall), % | 88.55 (85.86–90.85) | 84.24 (79.11–89.06) |
| Specificity, % | 99.97 (99.96–99.98)* | 99.97 (99.95–99.99)* |
| Positive predictive value, % | 89.68 (87.64–91.57) | 87.06 (82.91–90.64) |
| Negative predictive value, % | 99.97 (99.96–99.97)* | 99.97 (99.94–99.98)* |
| False positives per hour | 0.39 (0.49–0.31) | 0.24 (0.33–0.15) |
| False negatives per hour | 0.44 (0.57–0.33) | 0.3 (0.42–0.19) |
*: p<0.05 between day and night.