Table 1.

Characteristics of Study Population (n= 3494). Values are reported as Mean ± Standard Deviation unless otherwise stated.

Women, n (%)		2069 (59.2)
Age, years		64.9 ± 9.0
WOMAC score		15.6 ± 16.2
Knee pain, NPRS		3.6 ± 2.8
Currently seeking healthcare for Arthritis, n (%)		305 (7.2)
Walking speed, m/s		1.30 ± 0.22
Charlson Comorbity Score		0.55 ± 1.05
Body Mass Index; kg/m2		28.9 ± 5.0
Knee extensor strength, N		317 ± 122
Radiographic Severity, n (%)		(n=2915)
	K/L grade 0	873 (30.0)
	K/L grade 1	421 (14.5)
	K/L grade 2	802 (27.5)
	K/L grade 3	528 (18.1)
	K/L grade 4	288 (9.9)
CES-D score		7.24 ± 7.54
CSQ-Cat score		0.67 ± 1.16
Number of Bodily Pain Sites		1.59 ± 2.25
Knee Joint Tenderness Present on Physical Exam, n (%)		(n=3312)
	Medial Joint Tenderness, n (%)	1060 (35.5)
	Lateral Joint Tenderness, n (%)	756 (25.3)
	Positive Patellar Grind Test, n (%)	504 (17.0)
	Pes Anserine Tenderness, n (%)	992 (33.3)

CCI: Charlson Comorbidity Index

BMI: Body Mass Index

K/L: Kellgren-Lawrence

CES-D: Center for Epidemiologic Studies—Depression Subscale

CSQ-Cat: Coping Strategies Questionnaire—Catastrophizing Subscale (2-question modified version)

WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index

NPRS: Numeric Pain Rating Scale