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Table 2 Correlation matrix of changes of scale scores.

From: Functional improvement after Total Knee Arthroplasty Revision: New observations on the dimensional nature of outcome

  D1 D2 D3 D4 D5 D6 D7 D8 D9
D1 1.00 -.10 .26** .27** .28** .47** .54** .27** .13
N 172 172 132 161 170 167 168 146 93
D2   1.00 .17* .21** .03 .14 .20* .17* .28**
N   172 132 161 170 167 168 146 93
D3    1.00 .27** -.03 .33** .30** .63** .26*
N    142 133 138 135 136 128 84
D4     1.00 .02 .30** .31** .27** .17
N     172 168 164 165 149 97
D5      1.00 .47** .40** .02 .10
N      181 176 175 155 100
D6       1.00 .71** .26** .32*
N       177 175 153 99
D7        1.00 .36** .17
N        177 153 99
D8         1.00 .24*
N         160 101
D9          1.00
N          105
  1. First number in every cell (D1-D9) specifies correlation coefficient, second number (N) – number of cases included into calculations.
  2. D1-D9 indicate changes of scale scores from baseline to follow-up for SF-36 PCS (D1), SF-36 MCS (D2), Physician Severity Assessment (D3), LEAS (D4), WOMAC Stiffness (D5), WOMAC Pain (D6), WOMAC Difficulty of Functioning (D7), KSS Functional Assessment (D8), KSS Knee Rating (D9).
  3. ** Correlation is significant at the 0.01 level (2-tailed).
  4. * Correlation is significant at the 0.05 level (2-tailed).