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Table 2 Cartilage volume in absolute value (mm3) and change over 24 months follow-up from baseline

From: Risk factors associated with the loss of cartilage volume on weight-bearing areas in knee osteoarthritis patients assessed by quantitative magnetic resonance imaging: a longitudinal study

  Baseline (mm3) 24 months (mm3) Change at 24 months (mm3) Change at 24 months (percentage)
Femoral condyle     
   Medial 2,228.9 ± 609.1 2,028.3 ± 585.1 -201.5 ± 178.6 -9.1 ± 7.5
   Lateral 2,155.2 ± 677.6 2,105.8 ± 654.3 -43.8 ± 94.5 -2.0 ± 4.6
   Trochlea 2,974.4 ± 901.4 2,835.7 ± 849.5 -123.8 ± 156.6 -4.1 ± 5.1
Transversal subregions     
   Medial     
Posterior 840.6 ± 240.5 802.7 ± 236.5 -37.9 ± 70.2 -4.4 ± 7.9
Central 729.2 ± 240.3 643.3 ± 232.9 -87.9 ± 90.4 -12.0 ± 11.5
Anterior 659.2 ± 213.3 582.2 ± 212.0 -75.7 ± 72.8 -12.4 ± 12.0
Trochlea 1,307.6 ± 404.9 1,225.7 ± 365.0 -77.8 ± 90.9 -5.5 ± 6.1
   Lateral     
Posterior 578.6 ± 192.9 571.9 ± 193.1 -4.8 ± 43.5 -0.9 ± 7.6
Central 931.9 ± 323.8 903.0 ± 312.2 -28.3 ± 53.4 -2.9 ± 6.2
Anterior 644.7 ± 210.2 631.0 ± 203.2 -10.8 ± 32.5 -1.7 ± 5.6
Trochlea 1,666.7 ± 537.8 1,610.1 ± 529.9 -46.0 ± 98.7 -3.0 ± 6.8
Tibial plateau     
   Medial 1,320.4 ± 419.9 1,195.0 ± 373.2 -126.0 ± 117.0 -9.3 ± 7.5
   Lateral 1,673.8 ± 520.8 1,563.1 ± 466.9 -101.9 ± 98.1 -6.1 ± 5.7
Concentric zones     
   Medial     
Border ring 709.0 ± 242.0 660.1 ± 211.9 -47.9 ± 57.1 -6.2 ± 6.3
Center ring 611.4 ± 192.6 534.9 ± 181.8 -78.1 ± 70.0 -13.0 ± 10.9
   Lateral     
Border ring 790.2 ± 249.1 746.3 ± 224.0 -39.0 ± 44.3 -5.0 ± 5.7
Center ring 883.6 ± 286.1 816.8 ± 260.3 -62.9 ± 60.3 -7.2 ± 7.8
Transversal subregions     
   Medial     
Posterior 397.6 ± 140.5 380.1 ± 128.4 -17.1 ± 36.1 -3.7 ± 7.7
Central 566.7 ± 191.6 484.6 ± 179.7 -84.2 ± 72.4 -15.0 ± 12.0
Anterior 356.1 ± 130.2 330.3 ± 116.7 -24.7 ± 36.0 -6.8 ± 10.3
   Lateral     
Posterior 515.5 ± 176.7 474.9 ± 154.5 -36.6 ± 41.3 -7.1 ± 8.9
Central 791.7 ± 265.4 729.7 ± 244.4 -59.5 ± 56.0 -7.8 ± 8.4
Anterior 366.5 ± 122.3 358.4 ± 115.2 -5.8 ± 18.3 -1.6 ± 5.0
  1. The data are the mean ± standard deviation. The p values from one sample two-sided Student t test in the change of cartilage volume are less than 0.0001 for all regions except for the lateral femoral condyle at the anterior and posterior areas and for the lateral tibial plateau at the anterior area.