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Table 7 Average values of T2 parameters in the incidence and control groups

From: Texture analysis of cartilage T2 maps: individuals with risk factors for OA have higher and more heterogeneous knee cartilage MR T2 compared to normal controls - data from the osteoarthritis initiative

Parameter Compartment a Incidence group (n = 92) Control group (n = 53) Pvalue unadjusted Pvalue adjusted b Coefficient c 95% confidence interval
T2 Mean, ms All 32.65 ± 1.55 32.07 ± 1.38 0.056 0.018 -0.72 -1.31 -0.12
   MF 37.68 ± 2.28 36.85 ± 2.16 0.042 0.003 -1.18 -1.94 -0.42
   MT 30.27 ± 1.88 29.51 ± 1.77 0.029 0.036 -0.72 -1.39 -0.04
GLCM Contrast All 248.67 ± 38.39 227.41 ± 35.00 0.005 0.003 -22.81 -37.48 -8.13
   MF 364.17 ± 68.98 333.37 ± 66.58 0.013 0.009 -32.97 -57.72 -8.21
   MT 257.30 ± 63.19 226.96 ± 47.83 0.004 0.013 -25.40 -45.49 -5.48
  Entropy All 6.34 ± 0.16 6.30 ± 0.19 0.142 0.286 -0.03 -0.10 0.03
   MF 6.96 ± 0.17 6.90 ± 0.17 0.055 0.062 -0.06 -0.12 0.003
   MT 6.17 ± 0.28 6.09 ± 0.34 0.050 0.127 -0.07 -0.15 0.02
  Variance All 187.77 ± 26.69 171.74 ± 24.57 0.003 0.002 -16.60 -27.09 -6.27
   MF 255.64 ± 42.38 233.10 ± 38.60 0.003 0.001 -24.86 -39.82 -9.91
   MT 183.65 ± 37.88 162.66 ± 32.01 0.001 0.005 -17.89 -30.31 -5.47
  1. aAll, average of all compartments: medial femur (MF), medial tibia (MT), lateral femur, lateral tibia, and patella. bP value adjusted for age, gender, and body mass index (BMI). cThe coefficient is the difference in the T2 parameter between the incidence and control groups, adjusted for age, gender, and BMI. A coefficient below 0 indicates that the control group has a lower estimated T2 parameter in comparison with the incidence group. GLCM, grey level co-occurrence matrix.