Early cartilage abnormalities at the hip are associated with obesity and body composition measures – a 3.0T MRI community-based study

Table 1 Characteristics of study participants

	Men (n = 62)	Women (n = 79)	P ¹
Baseline measurements (1990 to 1994)
Body mass index, kg m⁻²	27.2 (3.5)	25.1 (4.2)	<0.01
Fat mass, kg	24.2 (7.7)	25.0 (8.9)	0.59
Body fat, %	28.8 (6.1)	37.3 (7.0)	<0.001
Fat-free mass, kg	58.3 (5.0)	40.3 (3.6)	<0.001
Follow-up measurements (2009 to 2010)
Age, years	66.2 (6.8)	67.2 (7.8)	0.41
Body mass index, kg m⁻²	28.3 (4.1)	27.0 (5.3)	0.09
WOMAC median pain, out of 500	19	22	-
Femoral head cartilage volume, mm³	3891 (636)	2867 (451)	<0.001
Femoral head bone area, mm²	1831 (179)	1429 (126)	<0.001
Femoral head cartilage defects, n (%)
Central superolateral	22 (35.5)	23 (29.1)	0.42²
Central inferomedial	30 (48.4)	37 (46.8)	0.86²
Anterior	4 (6.3)	1 (1.3)	0.10²
Posterior	11 (17.5)	14 (17.7)	0.97²

Data presented as mean (standard deviation) or number (%) unless otherwise stated. ¹ P-values represent difference between genders analysed by independent sample t-tests unless otherwise stated. ²Chi-squared test. WOMAC, Western Ontario and McMaster University osteoarthritis index.

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