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Table 4 Bone-erosive damage assessed on the basis of US scores across TGF-β 869C/T SNPs according to ACPA and RF statusa

From: Transforming growth factor β 869C/T and interleukin 6 -174G/C polymorphisms relate to the severity and progression of bone-erosive damage detected by ultrasound in rheumatoid arthritis

Patient status

CC

CT

TT

P value

ACPA-positive

    

   Mean overall patient TES (± SD)

39.5 ± 21.4

39.4 ± 26.3

23.7 ± 13.7

NS

   Mean MCP TES (± SD)

16.7 ± 8.7

14.2 ± 9.1

11.2 ± 5.1

NS

   Mean PIP TES (± SD)

9.4 ± 11.9

11.9 ± 9.8

7.7 ± 6.7

NS

   Mean MTP TES (± SD)

13.3 ± 8.8

13.1 ± 8.3

4.75 ± 4.2

P = 0.008, Pc < 0.01; CC vs. TT

    

P = 0.01, Pc < 0.05; CT vs. TT

ACPA-negative

    

   Mean overall patient TES (± SD)

24 ± 21.9

22 ± 11.1

38 ± 17.1

NS

   Mean MCP TES (± SD)

11.5 ± 8.4

7.1 ± 3.6

14 ± 4.7

P < 0.05, Pc = NS; CT vs. TT

   Mean PIP TES (± SD)

5.6 ± 5.3

6.1 ± 5.2

14.2 ± 7.8

P < 0.05, Pc = NS; CC vs. TT

   Mean MTP TES (± SD)

6.8 ± 9.4

8.6 ± 4.8

9.8 ± 8.3

NS

RF-positive

    

   Mean overall patient TES (± SD)

38 ± 22.4

37.6 ± 25.7

23.7 ± 13.7

NS

   Mean MCP TES (± SD)

16.4 ± 8.9

13.8 ± 8.9

11.2 ± 5

NS

   Mean PIP TES (± SD)

8.6 ± 7.6

11 ± 9.6

7.7 ± 6.7

NS

   Mean MTP TES (± SD)

13 ± 9.1

12.7 ± 8.1

4.7 ± 4.2

P = 0.01, Pc < 0.05; CC vs. CT

    

P = 0.01, Pc < 0.05; CT vs. TT

RF-negative

    

   Mean overall patient TES (± SD)

16.5 ± 8.7

27.4 ± 16.5

38 ± 17.1

P = 0.03, Pc = NS; CC vs. TT

   Mean MCP TES (± SD)

7.5 ± 3.3

8.8 ± 6

14 ± 4.7

P = 0.03, Pc = NS; CC vs. TT

   Mean PIP TES (± SD)

5 ± 3.5

9 ± 6.8

14.2 ± 7.8

P = 0.03, Pc < 0.05; CC vs. TT

   Mean MTP TES (± SD)

4 ± 3.5

9.6 ± 8.3

9.8 ± 8.3

NS

  1. aACPA: anticitrullinated protein/peptide antibody; MCP: metacarpophalangeal; MTP: metatarsophalangeal; NS: not significant; PIP: proximal interphalangeal; RF: rheumatoid factor; TES: total erosion score; TGF-β: transforming growth factor β; US: musculoskeletal ultrasound. The comparisons were performed between genotypes (CC vs. CT vs. TT groups) in ACPA-positive and ACPA-negative patients and in RF-positive and RF-negative populations, respectively, using Kruskal-Wallis one-way analysis of variance. Pc: P values with the Bonferroni correction.