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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.