A Cost-Utility Analysis of Robotic Arm-Assisted Total Hip Arthroplasty: Using Robotic Data from the Private Sector and Manual Data from the National Health Service

Table 2

Mean pre- and postoperative EQ-5D utility scores according to group. The change represents the improvement between the pre- and postoperative EQ-5D utilities, and the difference represents the difference between the groups pre- and postoperative and for change in the EQ-5D utilities.

Group	Time of assessment (mean, SD)		Change (95% CI)	value
	Preoperative	Postoperative
mTHA	0.384 (0.320)	0.754 (0.263)	0.370 (0.340 to 0.400)	<0.001
rTHA	0.630 (0.196)	0.905 (0.139)	0.275 (0.215 to 0.336)	<0.001
Difference (95% CI)	0.245 (0.144 to 0.346)	0.148 (0.144 to 0.346)	0.095 (−0.011 to 0.200)
value	<0.001	<0.001	0.078

Paired t-test, unpaired t-test, SD: standard deviation, CI: confidence interval.