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Table 1 Baseline characteristics of the participants based on their bone marrow lesion status

From: Correlates of knee bone marrow lesions in younger adults

 

No BML

BML (Yes)

P value

(n = 272)

(n = 55)

Age (years)

35.2 (2.7)

36.0 (2.6)

0.053

Sex (male, %)

52

58

0.239

BMI (kg/m2)

25.7 (4.3)

25.6 (4.0)

0.864

Knee injury (%)

16

24

0.113

Total physical activity (min/week)

927.4 (1308.9)

932.6 (1354.1)

0.979

Total vigorous PA (min/week)

205.2 (446.6)

349.0 (987.9)

0.094

Total moderate PA (min/week)

277.3 (621.6)

122.7 (189.2)

0.001

Cartilage defects (%)

4.4

16.4

0.003

Total meniscal extrusion (%)

3.3

11.1

0.024

Total meniscal tear (%)

12

22

0.051

Total meniscal lesions (%)

13.6

27.3

0.013

WOMAC pain (yes, %)

34

45

0.084

WOMAC stiffness (yes, %)

31

41

0.075

WOMAC dysfunction (yes, %)

39

56

0.018

WOMAC pain (>5 vs ≤5, %)

11

22

0.032

HDL cholesterol (fasting, mmol/L)

1.45 (0.34)

1.34 (0.28)

0.019

LDL cholesterol (fasting, mmol/L)

2.90 (0.80)

2.87 (0.69)

0.727

Total cholesterol (fasting, mmol/L)

4.86 (0.93)

4.69 (0.74)

0.145

  1. Two-tailed t tests used for differences between means; χ2 test used for proportions (percentages)
  2. Mean (SD) except for percentages
  3. BML bone marrow lesion, BMI body mass index, PA physical activity, WOMAC Western Ontario and McMaster Universities osteoarthritis index, HDL high-density lipoprotein, LDL low-density lipoprotein