Table 1

Participant demographics

Healthy subjects N = 601

Osteoarthritis subjects N = 132

Age in years, mean (standard deviation)

56.1 (7.3)

63.1 (10.5)

Females, number (percentage)

448 (64.5%)

72 (54.5%)

Repeat imaging for research purposes, number (percentage)

85 (14.1%)

123 (93.1%)

Grainger et al. Arthritis Research & Therapy 2008 10:R18   doi:10.1186/ar2371