Verifying the Placement of Nasogastric Tubes at an Emergency Center: Comparison of Ultrasound with Chest Radiograph

Table 3

Comparison of the subxiphoid ultrasound and direct radiograph.

		Direct Radiograph		Total	Sensitivity	Specificity	PPV	NPV
		Negative	Positive
Subxiphoid US	Negative	2	10	12	78.72%	100%	100%	16.67%
	Positive	0	37	37
Total		2	47	49