. Author manuscript; available in PMC: 2013 Feb 1.

Published in final edited form as: J Magn Reson Imaging. 2011 Oct 10;35(2):370–378. doi: 10.1002/jmri.22834

Table 2.

Baseline characteristics of subjects with OA risk factors and those without OA risk factors. KL-score and frequency of OA risk factors are given as n (%).

	Subjects with OA risk factors (n=101)	Subjects without OA risk factors (n=41)
age [years]	50.8±2.9	50.6±3.1
BMI [kg/m²]	24.0±1.8	23.4±2.0
right KL-score = 0	75 (74.3%)	41 (100%)
right KL-score = 1	26 (25.7%)	0 (0%)
left KL-score = 0	77 (76.2%)	41 (100%)
left KL-score = 1	21 (20.8%)	0 (0%)
left KL-score = 2	3 (3.0%)	0 (0%)
OA risk factors:
knee symptoms in the past 12 months	88 (87.1%)	0 (0%)
history of knee injury	54 (53.5%)	0 (0%)
history of knee surgery	24 (23.8%)	0 (0%)
family history of knee replacement surgery	23 (22.8%)	0 (0%)
Heberden nodes	17 (16.8%)	0 (0%)