Table 1.

Statistical evaluation of OHRM versus the chest-strap HR monitor

Activities	Hours collected	Coverage Δ ≤ 10 bpm (%)	Availability quality index > 0 (%)	MAE (bpm)	SEE (bpm)	Bias (bpm)
Healthy normal weight, BMI < 25
Walking	20.6	95.4	99.2	1.8	4.7	− 0.2
Running	7.1	96.0	99.5	1.7	6.6	− 0.7
Cycling	11.3	98.4	99.9	0.8	2.6	−0.3
Gym	60.6	92.5	98.6	2.9	9.3	−1.1
Household	–	–	–	–	–	–
Sedentary	21.0	98.0	99.9	1.3	5.5	−0.3
Overall	120.5	94.7	99.1	2.2	7.4	−0.7
Healthy over-weight, BMI > 25
Walking	6.4	97.1	99.5	1.2	3.2	0.1
Running	2.0	98.8	99.9	0.8	2.8	−0.3
Cycling	3.8	98.9	99.9	0.7	2.2	−0.2
Gym	22.6	95.6	99.3	2.0	7.0	−0.7
Household	–	–	–	–	–	–
Sedentary	3.4	99.3	100.0	0.9	3.9	−0.1
Overall	38.2	96.6	99.5	1.5	5.8	−0.5
Pregnant
Walking	9.6	93.7	98.9	2.4	6.1	−0.1
Running	–	–	–	–	–	–
Cycling	3.4	99.9	100.0	0.3	1.0	0.1
Gym	3.4	86.4	97.6	3.4	7.2	−2.0
Household	9.6	86.0	98.4	4.2	7.3	0.7
Sedentary	1.7	97.9	100.0	1.1	2.7	−0.6
Overall	27.7	91.1	98.8	2.8	6.2	−0.1
CAD
Walking	2.6	96.9	99.9	1.7	4.2	1.0
Running	–	–	–	–	–	–
Cycling	2.1	85.6	98.5	4.4	7.1	2.6
Gym	0.8	95.1	99.0	2.7	4.2	0.7
Household	3.5	95.2	99.4	2.2	4.9	0.4
Sedentary	1.4	99.7	100.0	0.8	1.6	0.1
Overall	10.3	94.2	99.4	2.4	5.0	1.0
All
Walking	49.9	94.6	99.0	2.0	5.2	−0.0
Running	43.6	95.2	99.0	2.0	7.2	−0.5
Cycling	93.4	96.0	99.5	1.7	5.3	−0.4
Gym	67.5	92.2	98.6	3.0	9.5	−1.2
Household	67.6	94.7	99.6	2.3	5.0	−0.4
Sedentary	49.0	98.4	99.8	1.2	5.7	−0.4
Overall	371.1	95.1	99.3	1.4	6.5	−0.5

OHRM Optical Heart Rate Monitor, MAE Mean Absolute Error, SEE Standard Error of the Estimate, CAD Coronary Artery Disease