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Table 1 Characteristics of subjects with and without baseline medial meniscal extrusion

From: Knee meniscal extrusion in a largely non-osteoarthritic cohort: association with greater loss of cartilage volume

Characteristic Meniscal extrusion at baseline P value
  Negative (n = 273) Positive (n = 21)  
Age (years) 45.0 (6.6) 47.2 (5.4) 0.148
Sex (female [%]) 59 43 0.150*
Family history of OA (positive [%]) 45 57 0.284*
Height (cm) 169.0 (8.5) 172.1 (8.2) 0.102
Weight (kg) 76.6 (14.6) 92.7 (21.5) < 0.001
BMI (kg/m2) 26.8 (4.5) 31.3 (7.0) < 0.001
Knee pain (%) 33 38 0.665*
Obese (%) 18 52 < 0.001*
Past knee injury (%) 19 38 0.037*
Medial tibial cartilage volume (ml) 2.2 (0.5) 2.4 (0.5) 0.051
Lateral tibial cartilage volume (ml) 2.6 (0.7) 2.7 (0.6) 0.408
Medial femoral cartilage volume (ml) 4.6 (1.3) 4.7 (1.0) 0.632
Lateral femoral cartilage volume (ml) 4.7 (1.3) 5.1 (1.0) 0.280
Medial tibial bone area (cm2) 17.3 (2.6) 19.8 (3.8) < 0.001
Lateral tibial bone area (cm2) 11.9 (2.0) 13.5 (2.5) 0.001
Medial tibiofemoral cartilage defect (0–8) 2.0 (0.6) 3.1 (1.4) < 0.001
Lateral tibiofemoral cartilage defect (0–8) 2.0 (0.7) 2.1 (0.7) 0.550
Any radiographic osteoarthritis (%) 15 52 < 0.001*
Medial joint space narrowing (%) 13 38 0.001*
Medial osteophytes (%) 4 43 < 0.001*
Lateral joint space narrowing (%) 3 5 0.737*
Lateral osteophytes (%) 3 14 < 0.001*
Change in medial tibial cartilage volume (%) -2.4 (4.1) -4.7 (4.4) 0.015
Change in lateral tibial cartilage volume (%) -1.5 (3.4) -1.6 (3.8) 0.860
Change in medial femoral cartilage volume (%) -3.3 (2.6) -4.1 (3.9) 0.278
Change in lateral femoral cartilage volume (%) -3.3 (2.5) -3.5 (3.1) 0.662
Change in medial tibial bone area (%) +0.7 (1.8) +0.2 (1.7) 0.258
Change in lateral tibial bone area (%) +0.3 (2.8) +0.5 (2.4) 0.781
Change in medial tibiofemoral cartilage defect -0.07 (0.86) 0.29 (1.06) 0.074
Change in lateral tibiofemoral cartilage defect -0.02 (0.81) 0.50 (1.20) 0.007
  1. Values are expressed as mean (standard deviation), except for percentage. *χ2 test; all others t-test. BMI, body mass index; OA, osteoarthritis.