Table 7

Average values of T2 parameters in the incidence and control groups

Parameter

Compartmenta

Incidence group (n = 92)

Control group (n = 53)

P value unadjusted

P value adjustedb

Coefficientc

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


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.

Joseph et al. Arthritis Research & Therapy 2011 13:R153   doi:10.1186/ar3469

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