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Table 2 Summary of Principle Components Analysis, Components and Factor Weights for normal, early OA, advanced OA (OA) and RA

From: Matrix metalloproteinase protein expression profiles cannot distinguish between normal and early osteoarthritic synovial fluid

A. PCA of Normal, Early OA, OA, and RA

PC1

3.44

43%

  

PC2

1.53

19%

  

PC3

1.09

14%

  

PC4

0.76

10

  

MMP

PC1

PC2

PC3

 

MMP

0.2704

0.5714

-o.2679

 

MMP2

0.4037

-0.2209

-0.2829

 

MMP3

0.3665

0.416

-0.2448

 

MMP 7

0.2875

-0.1492

0.6697

 

MMP8

0.4962

-0.1641

-0.0277

 

MMP9

0.4130

0.0671

0.4098

 

MMP12

0.0239

0.5104

0.3486

 

MMP13

0.3599

-0.3706

-0.2225

 

B. PCA of Normal and Early OA

Component Eigenvalue Proportion

PC1

20.7

26%

  

PC2

1.97

25%

  

PC3

1.51

19%

  

PC4

1.09

14%

  

PC5

0.49

6%

  

MMP

PC1

PC2

PC3

PC4

MMP1

-0.2668

0.5118

0.2046

0.2665

MMP2

-0.3357

0.5045

0.0452

0.0662

MMP3

0.1353

0.1077

0.6581

0.3545

MMP7

0.1996

0.4664

-0.1648

-.04650

MMP8

0.4399

0.2325

-0.2258

0.5606

MMP9

0.5954

0.0967

-0.2546

0.1539

MMP12

0.3143

0.3696

0.2386

-0.4688

MMP13

0.334

-0.2333

0.5685

-0.1580