Table 3 Cadence thresholds (steps/min) for moderate and vigorous intensity based on regression and ROC curve analyses
From: Walking cadence (steps/min) and intensity in 41 to 60-year-old adults: the CADENCE-adults study
Intensity (METs) | Measure | Regression thresholds | ROC thresholds | Heuristic thresholds | ||
|---|---|---|---|---|---|---|
Value | 95% PI | Value | 95% CI | Value | ||
3 | Threshold (steps/min) | 101.7 | 54.9–110.6 | 98.5 | 97.1–104.9 | 100 |
Se | 85.4 | – | 91.6 | – | 89.3 | |
Sp | 92.9 | – | 89.6 | – | 90.2 | |
PPV | 92.6 | – | 90.1 | – | 90.5 | |
NPV | 86.0 | – | 91.1 | – | 89.0 | |
Accuracy | 89.1 | – | 90.6 | – | 89.8 | |
AUC | – | – | 0.97 | 0.96–0.98 | – | |
4 | Threshold (steps/min) | 111.8 | 101.7–122.0 | 107.9 | 105.5–112.2 | 110 |
Se | 87.2 | – | 94.5 | – | 90.9 | |
Sp | 88.9 | – | 83.7 | – | 86.2 | |
PPV | 74.5 | – | 68.3 | – | 71.0 | |
NPV | 94.9 | – | 97.6 | – | 96.2 | |
Accuracy | 88.4 | – | 86.6 | – | 87.4 | |
AUC | – | – | 0.95 | 0.93–0.96 | – | |
5 | Threshold (steps/min) | 122.0 | 111.8–132.1 | 115.9 | 110.6–117.7 | 120 |
Se | 70.4 | – | 90.1 | – | 79.0 | |
Sp | 92.9 | – | 85.7 | – | 90.5 | |
PPV | 60.6 | – | 49.3 | – | 56.1 | |
NPV | 95.3 | – | 98.2 | – | 96.5 | |
Accuracy | 89.9 | – | 86.3 | – | 88.9 | |
AUC | – | – | 0.94 | 0.92–0.96 | – | |
6 | Threshold (steps/min) | 132.1 | 122.0–142.2 | 117.3 | 113.1–126.1 | 130 |
Se | 52.6 | – | 97.4 | – | 55.3 | |
Sp | 97.5 | – | 82.9 | – | 96.1 | |
PPV | 58.8 | – | 27.6 | – | 48.8 | |
NPV | 96.8 | – | 99.8 | – | 97.0 | |
Accuracy | 94.7 | – | 83.8 | – | 93.6 | |
AUC | – | – | 0.95 | 0.93–0.97 | – | |