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Table 1 Comparison of characteristics between subjects

From: The association between subchondral bone cysts and tibial cartilage volume and risk of joint replacement in people with knee osteoarthritis: a longitudinal study

 

Cyst present

(n = 52)

No cyst

(n = 57)

P value

Age (years)

64.5 (10.3)

62.1 (10.1)

0.22a

Female, number (%)

21 (40.4)

35 (61.4)

0.03b

Height (cm)

168.9 (9.6)

167.8 (8.4)

0.55a

Weight (kg)

83.1 (15.6)

83.0 (15.2)

0.98a

Body mass index (kg/m2)

29.1 (4.9)

29.5 (5.5)

0.67a

Kellgren-Lawrence grade ≥ 2, number (%)

37 (72.5)

41 (77.4

0.57b

Medial tibial cartilage volume (mm3)

1,819 (511)

1,769 (454)

0.58a

Lateral tibial cartilage volume (mm3)

1,855 (619)

2,156 (522)

0.01a

Medial tibial bone area (mm2)

2,246 (405)

1,976 (349)

<0.001a

Lateral tibial bone area (mm2)

1,446 (243)

1,292 (229)

0.001a

Tibiofemoral BML present, number (%)

51 (98.1)

21 (36.8)

<0.001b

Knee-joint replacement over 4 years, number (%)

9 (19.6)

7 (13.7)

0.44b

  1. BML, bone marrow lesion. Presented as mean (SD), unless otherwise stated. P value calculated by using independent sample t testa or χ2 testb.