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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 21–40 year olds: CADENCE-adults

Intensity METs Measure Regression thresholds ROC thresholds Heuristic thresholds
Value 95% PI Value 99% CI Value
3 Threshold (steps/min) 102.2 45.9–111.2 95.5 91.5–105.5 100
Se 80.5 91.3 86.0
Sp 92.5 86.2 89.6
PPV 93.3 89.5 91.4
NPV 78.7 88.5 83.3
AUC 0.95 0.94–0.98
4 Threshold (steps/min) 112.5 103.5–120.2 112.5 105.5–113.5 110
Se 89.0 89.0 93.5
Sp 93.0 93.0 88.3
PPV 86.0 86.0 79.6
NPV 94.6 94.6 96.6
AUC 0.97 0.96–0.99
5 Threshold (steps/min) 120.2 112.5–127.8 116.5 114.5–120.5 120
Se 85.7 95.0 88.2
Sp 93.7 89.2 92.7
PPV 76.7 68.1 74.5
NPV 96.5 98.7 97.0
AUC 0.97 0.96–0.99
6 Threshold (steps/min) 129.1 121.4–136.8 119.5 119.5–125.5 130
Se 64.1 98.4 64.1
Sp 96.9 85.8 96.9
PPV 70.7 44.7 70.7
NPV 95.8 99.8 95.8
AUC 0.97 0.95–0.99
  1. 95% Prediction Intervals (PI). 99% Confidence Intervals (CI). AUC area under the curve, PPV Positive Predictive Value, NPV Negative Predictive Value, Se sensitivity, Sp specificity