TABLE 3.

Contingency Table for Mobility Levels

		Physician Score				Total
		A. Nothing	B. In-Bed	C. Out-of-Bed	D. Walking
Sensor Score	A. Nothing	18 (22)	4 (5)	0	0	22 (27)
	B. In-Bed	3 (4)	25 (30)	2 (2)	0	30 (36)
	C. Out-of-Bed	0	1 (1)	25 (30)	1 (1)	27 (32)
	D. Walking	0	0	0	4 (5)	4 (5)
	Total	21 (26)	30 (36)	27 (32)	5 (6)	83 (100)

The contingency table demonstrates physician and sensor agreement for each mobility level. Each cell in the table represents the n (%) of segments that are automatically labeled with mobility level (from “A” nothing in bed to “D” walking) by our sensor as compared to the expected mobility level, as determined by the physicians. Entries in boldface font indicate the number of segments with mobility levels that both the sensor and physicians agree on, whereas off-diagonal entries show the disagreements between the sensor and physicians.