Cadence (steps/min) and intensity during ambulation in 6–20 year olds: the CADENCE-kids study

Table 3 Identified cadence thresholds (steps/min), sensitivity, specificity, and area under the curve (AUC) corresponding to moderate and vigorous-intensity derived from ROC curve analyses

		6–8 year olds^a		9–11 year olds^a		12–14 year olds^a		15–17 year olds^a		18–20 year olds^b
Intensity	Measure	Cadence	99% CI	Cadence	99% CI	Cadence	99% CI	Cadence	99% CI	Cadence	99% CI
Moderate	Thr	121.3	106.3–134.9	116.3	112.6–120.1	108.7	100.6–114.4	105.6	97.7–107.5	95.9	85.7–96.4
	Se (%)	84.8		89.1		87.5		91.3		87.8
	Sp (%)	88.2		89.5		94.3		97.8		96.7
	AUC	0.94	0.88–0.98	0.94	0.86–0.99	0.97	0.95–0.99	0.99	0.98–1.00	0.97	0.95–0.99
Vigorous	Thr	149.0	147.5–167.2	121.9	121.2–135.8	116.3	109.9–130.5	124.3	117.2–126.3	119.3	118.3–129.0
	Se (%)	100.0		100.0		97.2		92.3		100.0
	Sp (%)	99.0		77.5		82.2		97.9		87.7
	AUC	1.00	0.99–1.00	0.93	0.86–0.98	0.96	0.92–0.98	0.99	0.98–1.00	0.98	0.97–0.99

Notes. Thr = Cadence thresholds in steps/min. Se = sensitivity. Sp = specificity. AUC = area under the curve. ^a Thresholds estimated using MET_y (mass-specific VO₂ [mL·kg·min⁻¹] divided by resting mass-specific VO₂ [estimated using the Schofield equation]) with moderate and vigorous intensity cut points of 4 and 6 MET_y, respectively. ^b Thresholds estimated using METs (mass-specific VO₂ [mL·kg·min^− 1] divided by 3.5 mL·kg·min^− 1) with moderate and vigorous intensity cut points of 3 and 6 METs, respectively

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