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Table 2 The concentrations of vitamin E, glutathione, iron and TBARs of the patients in all groups

From: Can levels of antioxidants in synovial fluid predict the severity of primary knee osteoarthritis: a preliminary study

  Mild-moderate group Severe group P-value
(KSS >46) (KSS ≤46)
n = 14 n = 9
Vitamin Ea (ng/mL) (range) 3.03 ± 1.75 (0.96–6.50) 1.12 ± 0.74 (0.00–2.10) 0.006*
Glutathione (nmol/mL) (range) 0.48 ± 0.55 (0.00–2.00) 0.45 ± 0.48 (0.00–1.63) 0.90
Iron (μg/mL) (range) 2.28 ± 0.99 (1.28–5.29) 1.89 ± 0.42 (1.43–2.69) 0.27
TBARsa (nmol/mL) (range) 1.22 ± 0.44 (0.76–2.28) 1.18 ± 0.23 (0.79–1.60) 0.84
  1. aMean ± standard deviation (S.D.). Abbreviation: KSS Knee society score (Insall et al. 1989; Asif and Choon 2005), TBARs Thiobarbituric acid reactive substances. *significant difference.