Table 1.

Data is depicted for neutral alignment, varus–valgus, flexion–extension, and rotation deformities

Deformity	Mean errora (°)	95% CI (°)
All deformities—frontal plane	0.4	0.1 to 0.7
All deformities—lateral plane	1.6	1.3 to 1.9
Neutral alignment—frontal plane	1.3	−0.3 to 2.9
Neutral alignment—lateral plane	2.1	0.6 to 3.4
Coronal deformity—frontal plane	0.6	0.1 to 1.0
Coronal deformity—lateral plane	1.7	0.9 to 2.3
Sagittal deformity—frontal plane	0.2	−0.5 to 0.8
Sagittal deformity—lateral plane	1.5	1.2 to 1.9
Rotational deformity—frontal plane	−0.1	−0.9 to 0.8
Rotational deformity—lateral plane	1.2	0.1 to 2.3

^aThe mean error characterizes the agreement between the angle calculated by the CAS system and the FARO arm.