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Table 2 Participant characteristics

From: Associations between systemic bone mineral density and early knee cartilage changes in middle-aged adults without clinical knee disease: a prospective cohort study

Characteristic

Value

Baseline

 

 Number of participants

153

 Age, years

46.7 (9.3)

 Female, n (%)

125 (81.7)

 Body mass index, kg/m2

32.4 (8.9)

   Range

16.9 to 54.9

 Obesity, n (%)

82 (53.6)

 WOMAC, median

 

   Pain (out of 500)

15

   Stiffness (out of 200)

5

   Function (out of 1700)

52

 Strenuous physical activity, n (%)

119 (77.8)

 Bone mineral density

 

  Total body

   Bone mineral density, g/cm2

1.24 (0.10)

   T-score

1.18 (1.22)

   T-score, range

−1.90 to 4.40

   Osteopenia, n (%)/osteoporosis, n (%)

4 (2.6)/0 (0)

  Spine

   Bone mineral density, g/cm2

1.26 (0.17)

   T-score

0.46 (1.44)

   T-score, range

−2.30 to 4.80

   Osteopenia, n (%)/osteoporosis, n (%)

19 (12.4)/0 (0)

  Total hip

   Bone mineral density, g/cm2

1.09 (0.16)

   T-score

0.63 (1.29)

   T-score, range

−2.40 to 4.50

   Osteopenia, n (%)/osteoporosis, n (%)

13 (8.5)/0 (0)

  Tibial cartilage volume, mm3

   Medial

996 (252)

   Lateral

1299 (369)

  Tibiofemoral cartilage defects, n (%)

   Medial

96 (62.7)

   Lateral

135 (88.2)

  Tibial bone area, mm2

   Medial

1888 (254)

   Lateral

1455 (211)

Change

 

  Number of participants

139

  Annual change in tibial cartilage volume, %

   Medial

1.5 (1.7)

   Lateral

1.0 (1.5)

  Progression of tibiofemoral cartilage defects, n (%)

   Medial

23 (16.5)

   Lateral

26 (18.7)

  1. Results displayed as mean (standard deviation) unless otherwise stated. WOMAC Western Ontario and McMaster University Osteoarthritis Index