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Table 1 Clinical data for the three subject groups divided according to the degree of osteoarthritis (OA)

From: Quantitative evaluation of subchondral bone microarchitecture in knee osteoarthritis using 3T MRI

  Total (n = 80) Control (n = 31) Mild OA(n = 33) Severe OA(n = 16) P value
Age 42.18 ± 13.68 30.23 ± 9.34 45.64 ± 9.09† 58.19 ± 6.34† 0.000*
Gender
 Male 35(43.75%) 11(35.48%) 17(51.51%) 7(43.75%) 0.434
 Female 45(56.25%) 20(64.52%) 16(48.49%) 9(56.25%)  
Knee joint
 Left 30(37.50%) 8(25.81%) 16(48.49%) 6(37.5%) 0.173
 Right 50(62.50%) 23(74.19%) 17(51.51%) 10(62.5%)  
 weight 66.01 ± 9.56 63.94 ± 6.39 68.03 ± 11.73 65.88 ± 9.38 0.233
 BMI 24.17 ± 2.69 23.51 ± 1.22 24.51 ± 3.32 24.71 ± 3.19 0.222
WOMAC OA index
 Pain 4.84 ± 5.39 0.00 ± 0.00 5.30 ± 2.76 13.25 ± 3.55 0.000*
 stiffness 0.96 ± 1.97 0.00 ± 0.00 1.00 ± 1.71 2.75 ± 3.00 0.000*
 Function 9.16 ± 12.57 0.00 ± 0.00 9.61 ± 9.29 26.00 ± 13.14 0.000*
  1. Data compared with ANOVA for continuous variables, Chi-squared test for categorical variables
  2. *Statistical significance, p < 0.05
  3. †Significantly different compared with normal group as determined using Scheffe’s test