Table 3.

Mean bias in different oxygen saturations measured by pulse oximetry in comparison to arterial blood gases among different groups of HF patients.

		Group A	Group B	Group C	p
		Mean bias±SD	Mean bias±SD	Mean bias±SD
O2 saturation in the finger	O2 sat <80%	-0.15±1.26	-4.15±3.15	-1.99±1.75	0.027*
	O2 sat >80% - <90%	-0.9±1.01	-3.03±2.49	-1.38±1.01	0.041*
	O2 sat> 90%	-0.4±0.43	-1.02±1.28	-0.5±0.28	0.009*
O2 saturation in the toe	O2 sat <80%	-0.29±0.22	-5.39±4.25	-2.06±1.83	0.03*
	O2 sat >80% - <90%	-1.08±0.05	-4.78±3.96	-1.76±1.30	0.040*
	O2 sat> 90%	-0.87±0.77	-1.09±0.65	-1±0.02	0.09
O2 saturation in the ear	O2 sat <80%	1.21±0.89	0.43±0.35	0.49±0.23	0.06
	O2 sat >80% - <90%	1.64±1.23	0.75±0.54	0.64±0.45	0.075
	O2 sat> 90%	2.23±0.76	1.0±0.91	0.88±0.62	0.049*
		0.009*	0.000*	0.01*

SD, standard deviation; O2 sat, oxygen saturation; *p<0.05.