Table 3.

Characteristics of the study population, stratified by degree of OA

	No knee OA	Mild knee OA	Moderate knee OA
All patients
No. of patients	20	18	15
Age (year)a	34 ± 13	53 ± 13	59 ± 17
Female patients
No. of patients	7 (35%)	6 (34%)	8 (53%)
Age (year)a*	34 ± 14	54 ± 14	62 ± 14
Male patients
No. of patients	13 (65%)	12 (66%)	7 (47%)
Age (year)a*	32 ± 12	53 ± 14	54 ± 21

^aMean values ± standard deviation

*There were significant differences (p < 0.001) in age between the three subject groups

OA, osteoarthritis