Interobserver and Intraobserver Reliabilities of Three-Dimensional Postoperative Evaluation Software in Total Hip Arthroplasty

Table 4

Intraobserver and interobserver reliabilities for implant positioning.

		Average (SD)	Intraobserver reliability (CI)	Interobserver reliability (CI)
				A1-B	A1-C	B-C
Cup	x (transverse)	0.8 (2.8)	0.992 (0.981–0.997)	0.987 (0.965–0.998)	0.989 (0.974–0.996)	0.948 (0.875–0.979)
	(sagittal)	0.2 (2.5)	0.992 (0.979–0.997)	0.987 (0.968–0.995)	0.982 (0.952–0.993)	0.853 (0.665–0.939)
	(longitudinal)	−1.2 (2.0)	0.966 (0.917–0.986)	0.947 (0.865–0.979)	0.960 (0.900–0.984)	0.834 (0.626–0.931)
Stem	x (transverse)	−0.9 (2.0)	0.976 (0.943–0.991)	0.977 (0.938–0.991)	0.978 (0.946–0.991)	0.987 (0.965–0.995)
	(sagittal)	1.0 (2.8)	0.993 (0.983–0.997)	0.993 (0.983–0.997)	0.992 (0.981–0.997)	0.995 (0.988–0.998)
	(longitudinal)	0.2 (5.1)	0.996 (0.990–0.998)	0.996 (0.990–0.998)	0.996 (0.990–0.998)	0.997 (0.992–0.999)

SD, standard deviation; CI, 95% confidence interval.