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Table 2 Synovial fluid biomarker concentrations (pg/μg of total protein) of osteoarthritic knees with and without effusion

From: Biochemical comparison of osteoarthritic knees with and without effusion

 

Non-Effused (n = 11)

Effused (n = 11)

  

Biomarker

Median (95% CI)

Median (95% CI)

p value

r

IL-1β

0.000009

(0.000003 - 0.000023)

0.000012

(0.000006 - 0.000020)

0.714

-0.078

IL-10

0.000017

(0.000007 - 0.000039)

0.000054

(0.000037 - 0.000184)

0.003*

-0.625

IL-13

0.000057

(0.000038 - 0.000173)

0.000047

(0.000034 - 0.000087)

0.670

-0.091

TIMP-1

0.519388

(0.000000 - 13.457844)

52.008696

(38.851239 - 80.618044)

< 0.001*

-0.791

TIMP-2

0.340405

(0.000000 - 2.521999)

4.471101

(3.758427 - 5.662756)

0.002*

-0.665

MMP-3

0.130385

(0.000000 - 6.931912)

81.236149

(0.000000 - 334.057639)

< 0.001*

-0.819

OPG

0.000148

(0.000045 - 0.000281)

0.000104

(0.000116 - 0.000447)

0.224

-0.259

VEGF

0.001912

(0.000000 - 0.020470)

0.019389

(0.011830 - 0.033989)

0.013

-0.515

  1. Note: CI = confidence interval, r = effect size, IL = interleukin, TIMP = tissue inhibitor of metalloproteinase, MMP = matrix metalloproteinase, OPG = osteoprotegerin, and VEGF = vascular endothelial growth factor. * p ≤ 0.006 was considered significant.