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Table 1 Characteristics of participants (split by median level of interleukin 17)

From: Serum levels of interleukin-17 and adiponectin are associated with infrapatellar fat pad volume and signal intensity alteration in patients with knee osteoarthritis

  Total (n = 170) IL-17 ≤ median (n = 85) IL-17 > median (n = 85) p Values
Age, yearsa 55.45 (8.25) 54.07 (8.17) 56.66 (8.39) 0.044
Female sex, %b 88.2 89 87 0.634
Height, cma 159.00 (6.89) 159.09 (7.01) 158.58 (6.88) 0.638
Weight, kga 64.83 (10.56) 64.23 (9.62) 65.09 (10.70) 0.591
BMI, kg/m2a 25.64 (3.85) 25.35 (3.20) 25.87 (3.88) 0.341
K-L grade, %b     0.268
 1 27.9 25.7 28.6  
 2 41.9 50.0 35.1  
 3 25.7 20.3 31.2  
 4 4.5 4.1 5.2  
Knee ROA, %b 72.1 74.3 71.4 0.689
IPFP signal intensity alteration, %b 43.1 44.2 40 0.298
IPFP volume, mm3a 20.46 (5.01) 20.57 (5.53) 20.42 (4.88) 0.855
Adiponectin, pg/mlc 18.67 (3.94–53.07) 35.08 (11.36–71.26) 12.82 (3.00–46.94) 0.001
Resistin, ng/mlc 2.37 (1.40–5.57) 2.18 (1.45–4.86) 2.81 (1.32–5.78) 0.532
  1. Abbreviations: BMI body mass index, K-L Kellgren-Lawrence, IL interleukin, ROA radiographic osteoarthritis, IPFP infrapatellar fat pad
  2. ROA was defined as a K-L grade ≥2. IL-17 median level 2.00 pg/ml (interquartile range 1.56–2.82). Data in bold denote statistically significant results
  3. a t tests were used for mean (SD)
  4. bχ2 tests were used for the proportions
  5. cMann-Whitney U tests were used for median (interquartile range)