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Table 3 Intersession standard errors of measurement of 3D scapular attitudes calculated in three static shoulder positions.

From: The reliability of three-dimensional scapular attitudes in healthy people and people with shoulder impingement syndrome

   

Intersession standard errors of measurement (in degrees)

   

Healthy subjects

SIS subjects

    

Impaired shoulder

Non-impaired shoulder

Arm Positions

Scapular Rotations

 

n = 30 shoulders

n = 8 shoulders

n = 8 shoulders

Rest

A-PT

SEM

1.6

0.9

1.3

  

95%CI

[1.3–2.2]

[0.6–1.7]

[0.8–2.6]

 

L-MR

SEM

2.0

1.1

0.7

  

95%CI

[1.6–2.7]

[0.7–2.2]

[0.5–1.5]

 

PRO-RET

SEM

2.0

1.9

2.8

  

95%CI

[1.6–2.6]

[1.3–3.9]

[1.8–5.6]

Flexion 70°

A-PT

SEM

1.8

1.3

1.8

  

95%CI

[1.4–2.4]

[0.9–2.6]

[1.2–3.6]

 

L-MR

SEM

2.5

1.3

1.2

  

95%CI

[2.0–3.4]

[0.9–2.7]

[0.8–2.3]

 

PRO-RET

SEM

4.2

1.6

1.6

  

95%CI

[3.4–5.7]

[1.1–3.3]

[1.1–3.2]

Abduction 90°

A-PT

SEM

2.1

2.0

2.3

  

95%CI

[1.7–2.9]

[1.3–4.0]

[1.5–4.6]

 

L-MR

SEM

2.2

2.9

2.7

  

95%CI

[1.7–2.9]

[1.9–5.8]

[1.8–5.6]

 

PRO-RET

SEM

3.3

1.5

2.3

  

95%CI

[2.6–4.4]

[1.0–3.1]

[1.5–4.7]

  1. Abbreviations: A-PT, anterior-posterior tilting; L-MR, lateral-medial rotation; PRO-RET, protraction-retraction; SIS, shoulder impingement syndrome; SEM, standard errors of measurement; 95%CI; 95% confidence interval.
  2. The method of calculation relative to the trunk was used to calculate the 3D scapular attitudes. The SEM were calculated using the mean of the two first trials of each session.