. Author manuscript; available in PMC: 2019 Jul 1.

Published in final edited form as: Arthritis Care Res (Hoboken). 2018 May 6;70(7):1005–1011. doi: 10.1002/acr.23448

Table 1.

Characteristics of study participants

	All (N=1925) 100% of sample	ROA (N=1169) 60.7% of sample	SxOA (N=511) 26.5% of sample
Age, years [Mean±sd (n)]	65.1±9.1 (1925)	66.1±9.1 (1169)	65.6±8.9 (511)
Women [% (n)]	55 (1065)	55 (641)	54 (274)
Race, white [% (n)]	84 (1601)	81 (937)	78 (394)
Education, more than college [% (n)]	66 (1266)	64 (746)	62 (318)
BMI (kg/m²) [Mean±sd (n)]	28.4±4.8 (1920)	29.1±4.8 (1166)	29.7±4.7 (510)
VAS pain [Mean±sd (n)]
Right	2.4±2.6 (1915)	2.7±2.7 (1163)	3.9±2.9 (507)
Left	2.3±2.6 (1916)	2.6±2.7 (1162)	4.0±2.8 (506)
Comorbidity [% (n)]	30 (565)	31 (364)	35 (177)
Steps/day [Mean±sd (n)]	6166±2924 (1925)	5883±2821 (1169)	5564±2778 (511)
Walked ≥ 6000 steps/day [% (n)]	45 (868)	42 (491)	40 (203)
Five times sit to stand test (sec) [Mean±sd (n)]	10.5±2.9 (1773)	10.8±3.0 (1058)	11.4±3.4 (439)
Walking speed (meters/sec) [Mean±sd (n)]	1.33±0.21 (1876)	1.31±0.21 (1139)	1.28±0.21 (494)
400-meter walk test (sec) [Mean±sd (n)]	306±53 (1707)	310±55 (1039)	319±60 (446)

ROA= radiographic OA SxOA= Symptomatic OA, BMI = body mass index, VAS = visual analog scale