Table 3 Cadence thresholds (steps/min) for relatively-defined intensity indicators of moderate and vigorous intensity based on regression and ROC curve analyses
From: Cadence (steps/min) and relative intensity in 61 to 85-year-olds: the CADENCE-Adults study
| Â | Regression | ROC | |
|---|---|---|---|
Moderate Intensity | Â | Â | |
≥ 64% HRmax | Threshold (steps/min) | 105.9 (38.0-135.7) | 104.3 (97.1-110.7) |
Se | 60.5 | 65.6 | |
Sp | 78.0 | 75.8 | |
PPV | 60.2 | 59.8 | |
NPV | 78.2 | 80.1 | |
Accuracy | 71.8 | 72.2 | |
|  | AUC | – | 76.7 (72.5–80.9) |
≥ 40% HRR | Threshold (steps/min) | 107.1 (38.0-129.8) | 103.3 (100.8-110.7) |
Se | 66.3 | 77.5 | |
Sp | 83.5 | 75.6 | |
PPV | 64.0 | 58.5 | |
NPV | 84.8 | 88.3 | |
Accuracy | 78.2 | 76.2 | |
|  | AUC | – | 83.1 (79.3–86.9) |
≥ 12 RPE | Threshold (steps/min) | 112.8 (46.6-148.4) | 102.0 (95.8-104.1) |
Se | 40.1 | 71.0 | |
Sp | 88.3 | 74.9 | |
PPV | 67.5 | 63.1 | |
NPV | 71.0 | 81.1 | |
Accuracy | 70.2 | 73.5 | |
|  | AUC | – | 78.2 (74.3–82.0) |
Vigorous Intensity | Â | Â | |
≥ 77% HRmax | Threshold (steps/min) | 126.1 (79.0-148.4) | 116.0 (97.1-128.6) |
Se | 36.0 | 60.0 | |
Sp | 96.0 | 85.9 | |
PPV | 30.0 | 16.9 | |
NPV | 96.9 | 97.8 | |
Accuracy | 93.3 | 84.7 | |
|  | AUC | – | 76.1 (65.4–86.8) |
≥ 60% HRR | Threshold (steps/min) | 126.4 (103.6-148.4) | 109.7 (109.7-119.1) |
Se | 46.2 | 92.3 | |
Sp | 96.9 | 76.0 | |
PPV | 42.9 | 16.0 | |
NPV | 97.3 | 99.5 | |
Accuracy | 94.5 | 76.7 | |
|  | AUC | – | 88.4 (80.7–96.1) |
≥ 14 RPE | Threshold (steps/min) | 132.1 (94.9-148.4) | 106.7 (98.1-116.8) |
Se | 15.8 | 84.2 | |
Sp | 99.2 | 70.3 | |
PPV | 60.0 | 17.4 | |
NPV | 94.1 | 98.4 | |
Accuracy | 93.5 | 71.3 | |
|  | AUC | – | 84.4 (78.4–90.3) |