Table 1.

Predictive Value of NMU-PO

NMU-PO	MU-PO		Totals	Predictive Vaue, %	95% CI, %
	Hypoxemia Present, n (Classification)	Hypoxemia Absent, n (Classification)
SpO2 <90%	12 (true positive)	24 (false positive)	36	33a	24-44
SpO2 ≥90%	3 (false negative)	630 (true negative)	633	99b	98-100
Totals	15	654	699

Note: Hypoxemia present is defined as SpO2 <90% and hypoxemia absent is defined as SpO2 ≥90%.

MU-PO = medical use pulse oximeters; NMU-PO = nonmedical use pulse oximeters; SpO2 = oxygen saturation.

^aPositive predictive value.

^bNegative predictive value.