. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: PM R. 2014 Aug 30;7(3):245–254.e3. doi: 10.1016/j.pmrj.2014.08.949

Table 3.b.

Inter-Rater Reliability of Rotator Cuff Muscle Atrophy

		Reviewer 2					Kappa (95% CI)	Percent Agreement (95% CI)
Reviewers 1 (Composite)	Muscle Atrophy^*

	Supraspinatus

	Supraspinatus		None	Mild	Mod	Severe

		None	24	2	0	0	0.72 (0.45, 0.98)	0.87 (0.69, 0.96)
		Mild	0	1	1	0
		Mod	0	1	0	0
		Severe	0	0	0	1

	Infraspinatus

	Infraspinatus		None	Mild	Mod	Severe

		None	21	4	1	0	0.54 (0.11, 0.96)	0.79 (0.60, 0.92)
		Mild	1	0	0	0
		Mod	0	0	1	0
		Severe	0	0	0	1

	Teres Minor

	Teres Minor		None	Mild	Mod	Severe

		None	28	0	0	0	1.00 (N/A)	1.00 (N/A)
		Mild	0	1	0	0
		Mod	0	0	1	0
		Severe	0	0	0	0

	Subscapularis

	Subscapularis		None	Mild	Mod	Severe

		None	26	2	0	0	0.64 (0.27, 1.00)	0.90 (0.73, 0.98)
		Mild	0	0	0	0
		Mod	0	1	1	0
		Severe	0	0	0	0

Muscle atrophy stages as described by Warner et al.²⁰

Note: There was too much motion artifact on one study to perform grading and one rater commented that there was too much edema of the infraspinatus on another study to perform grading of this muscle.