Background
This study evaluated the inter-tester reliability and intratester
reliability of electrogoniometric measures of sagittal
knee positions in supine, sitting and standing. Knee joint
angle measurements are performed as a part of joint
assessments and to evaluate treatment outcomes in elite
athletes [1,2] and patients with medical conditions such
as arthritis [3,4] and stroke [5]. Standard handheld goniometers
are often used in clinical settings to quantify static
knee joint positions. Measurement of knee joint angles
relies upon the accurate identification of the centre of
rotation of the knee [6]. Because the centre of knee joint