Table 1.

Demographics of the reliability and validity groups

Demographic	Reliability group	Validity group
Age (years)*	54.32 (11.57)	57.68 (11.54)
Gender (female/male)	64/11	58/9
Diagnosis
Knee osteoarthritis	54	51
Patellofemoral pain	21	16

* Data are presented as means, with standard deviations in parentheses.