Table 3 Pearson and intraclass correlation coefficients, Bland–Altman differences in means of SCIM III and SCIM-SR, and relative differences in total and subscale scores

From: Development and validation of a self-report version of the Spinal Cord Independence Measure (SCIM III)

 

Pearson correlation (95% CI)

Intraclass correlation (95% CI)

Bland–Altman difference

Relative difference (%) a

   

Mean

LOA

Point estimate 95% CI

 

Total score

0.87 (0.82–0.91)

0.90 (0.85–0.93)

5.14

−16.87–27.16

2.95–7.34

5.1

Subscale self-care

0.87 (0.81–0.91)

0.86 (0.79–0.90)

0.89

−6.10–7.87

0.19–1.59

4.5

Subscale respiration & sphincter management

0.81 (0.73–0.87)

0.80 (0.71–0.86)

1.05

−11.26–13.36

0.18–2.28

2.6

Subscale mobility

0.87 (0.82–0.91)

0.83 (0.76–0.89)

3.49

−7.07–14.05

2.44–4.54

8.7

  1. Abbreviations: CI, confidence interval; LOA, limit of agreement; SCIM, spinal cord independence measure; SCIM-SR, self-report version of SCIM III.
  2. Missing values were accounted for by multiple imputation.
  3. aRelative difference=Bland–Altman difference/maximum score of the scale × 100.
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