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Table 3 CMC values for reproducibility of the scapular angles during shoulder abduction. The data is presented as mean ± standard deviation. Most measurement presented very good reproducibility (CMC > 0.75) with acceptable results for intra-observer agreement in scapular tilt and upward/downward rotation and poor results for inter-observer agreement in scapular internal-external rotation

From: Evaluation of a novel portable three-dimensional scapular kinematics assessment system with inter and intraobserver reproducibility and normative data for healthy adults

ABDUCTION

Scapular internal/external rotation

Scapular upward/downward rotation

Scapular anterior/posterior tilt

“Same day”

intraobserver

0.75 ± 0.19

0.95 ± 0.05

0.89 ± 0.13

“Different day”

intraobserver

0.73 ± 0.24

0.95 ± 0.05

0.91 ± 0.09

Interobserver

0.67 ± 0.29

0.90 ± 0.10

0.89 ± 0.15