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Table 5 Correlation Matrix of the Improvement Factors for Various Cohorts.

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

  V1 V2 V3 V4
V1 1.00 (69) 0.37 (69)** 0.07 (69) 0.08 (69)
  1.00 (165) 0.35 (109)** 0.10 (96) 0.24 (89)*
V2   1.00 (69) 0.21 (69) 0.19 (69)
   1.00 (120) 0.21 (113)* 0.21 (76)
V3    1.00 (69) 0.24 (69)*
    1.00 (172) 0.28 (93)**
V4     1.00 (69)
     1.00 (105)
  1. First number in every cell – correlation coefficient; second number – the sample size. "Factor Analysis" cohort (first line in every cell) contains cases (69) when all four factors can be computed; Six other cohorts (second line in every cell) contain cases when at least two factors can be computed.
  2. ** Correlation is significant at the 0.01 level (2-tailed).
  3. * Correlation is significant at the 0.05 level (2-tailed).