Table 4.

Physical attributes of the different devices

		Stationary PCs	Generic COW	Ergonomic COW	Tablet PC
	Number of devices	12	10	1	4
	Screen size diagonal (inch)	15'', 17'', 19''	17''	14''	10.5'', 12''
	Weight (kg)				1.6, 1.9
Dimensions			Trolley	Trolley	Device
	Height min/max (cm)	-	73/105 - 77/100	70/110	25 - 26
	Width min/max (cm)	-	92/121 - 96/126	53	29.5 - 25.5
	Depth (cm)	-	37 - 45	67	2.5 - 2.5
Boot-up times (min)
	Mean restart time (SD)	2.54 (1.33)	2.39 (0.46)	2.13 (-)	3.51 (0.41)
	Mean start time (SD)	2.16 (1.35)	2.15 (0.50)	1.30 (-)	3.11 (1.12)
Time from desktop to log on screen (sec)
	Mean 1st time (SD)	20.81 (6.62)	17.23 (2.50)	26.16 (-)	20.68 (7.42)
	Mean subsequent times (SD)	16.12 (2.66)	16.05 (1.12)	18.21 (2.94)	15.06 (1.45)
Time from log on screen to system start up (sec)
	Mean 1st time (SD)	3.56 (0.57)	3.99 (0.57)	3.37 (-)	3.84 (0.6)
	Mean subsequent times (SD)	3.5 (0.45)	3.67 (0.48)	5.30 (2.64)	3.6 (0.51)