Table 2. Cut points in counts per minute (cpm) for each activity intensity category and their corresponding optimal sensitivity and specificity, and area under the ROC curve (AUC) values.

	Intervals (cpm)	Optimal sensitivity (%)	Optimal specificity (%)	Achieved sensitivity (%)	Achieved specificity (%)	AUC
Sedentary	≤100	99	97	99	97	0.98 (p<0.001)
Light	100–2240	60	83	59	83	0.61 (p<0.005)
Moderate	2241–3840	61	76	60	76	0.60 (p<0.005)
Vigorous	≥3841	95	91	95	91	0.98 (p<0.001)