Development and Validation of a Photoplethysmography System for Noninvasive Monitoring of Hemoglobin Concentration

Table 2

Groups based on differences between noninvasive (SpHb) and laboratory reference Hb values (tHb).

Variables	<0.5 g/dL	0.5∼1.0 g/dL	1.1∼1.5 g/dL	1.6∼2.0 g/dL	>2.0 g/dL
|SpHb_PLS - Lab_tHb|	65(27.3%)	48(20.2%)	60(25.2%)	25(10.5%)	40(16.8%)
|SpHb_BP - Lab_tHb|	65(27.3%)	53(22.3%)	50(21.0%)	30(12.6%)	40(16.8%)