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Table 2 Intrasession 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

   

Intrasession standard errors of measurement (in degrees)

   

Healthy subjects

SIS subjects

     

Impaired shoulder

Non-impaired shoulder

   

n = 30 shoulders

n = 8 shoulders

n = 8 shoulders

Arm Positions

Scapular Rotations

 

Trials 1-2-3

Trials 1–2

Trials 1–2

Trials 1–2

Rest

A-PT

SEM

1.6

1.9

2.4

1.6

  

95%CI

[1.4–2.0]

[1.5–2.5]

[1.6–4.8]

[1.1–3.2]

 

L-MR

SEM

1.9

2.2

1.0

1.4

  

95%CI

[1.6–2.3]

[1.8–3.0]

[0.7–2.0]

[1.0–2.9]

 

PRO-RET

SEM

2.2

2.4

0.8

2.3

  

95%CI

[1.9–2.7]

[1.9–3.2]

[0.5–1.5]

[1.5–4.7]

Flexion 70°

A-PT

SEM

1.0

1.2

1.1

0.6

  

95%CI

[0.9–1.3]

[1.0–1.6]

[0.7–2.2]

[0.4–1.3]

 

L-MR

SEM

1.3

1.2

1.5

0.8

  

95%CI

[1.1–1.6]

[0.9–1.6]

[1.0–3.0]

[0.5–1.5]

 

PRO-RET

SEM

1.9

1.6

0.8

1.4

  

95%CI

[1.6–2.3]

[1.3–2.1]

[0.5–1.6]

[0.9–2.9]

Abduction 90°

A-PT

SEM

1.0

0.9

0.8

1.1

  

95%CI

[0.8–1.2]

[0.7–1.2]

[0.5–1.6]

[0.7–2.3]

 

L-MR

SEM

1.5

1.6

1.2

1.0

  

95%CI

[1.3–1.8]

[1.3–2.1]

[0.8–2.4]

[0.7–2.1]

 

PRO-RET

SEM

1.9

1.7

1.3

1.7

  

95%CI

[1.6–2.3]

[1.4–2.3]

[0.8–2.6]

[1.1–3.5]

  1. Abbreviations: A-PT, anterior-posterior tilting; L-MR, lateral-medial rotation; PRO-RET, protraction-retraction; SIS, shoulder impingement syndrome; Trial 1-2-3, standard errors of measurement calculated using the three trials of the first session; Trial 1–2, standard errors of measurement calculated using the two first trials of the first session; 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.