For patients with knee OA there is limited evidence that a lower level of physical function is associated with a lower level of physical activity .
There is also limited evidence that depression is not associated with the level of physical activity .
For patients with hip OA there is limited evidence that higher age , higher body mass index ( BMI ) and a low level of physical function is associated with a low level of physical activity .
CONCLUSION A high age ( hip OA ) , a high BMI ( hip OA ) and a low level of physical function ( both hip and knee OA ) are related to a low level of physical activity .
OBJECTIVE To give an overview of factors related to the level of physical activity  in patients with hip or knee osteoarthritis ( OA ) .
Moving to maintain function in knee osteoarthritis: evidence from the osteoarthritis initiative.
OBJECTIVES To investigate the association between baseline physical activity and 1-year functional performance in adults with knee osteoarthritis ( OA ) . DESIGN Prospect i ve cohort study of knee OA development and progression with 1-year follow-up . SETTING Community . PARTICIPANTS Osteoarthritis Initiative public data on adults with knee OA ( n=2274 ; age , 45 - 79y ) who participated in functional performance assessment s ( timed 20-m walk and chair st and test ) at baseline and 1-year follow-up . INTERVENTIONS Not applicable . MAIN OUTCOME MEASURE A good 1-year performance outcome ( separately defined for walk time and chair st and measures ) was improvement from baseline quintile or maintenance in the best quintile . RESULTS Almost 2 in 5 persons with radiographic knee OA improved or maintained high performance at 1 year .  Physical activity  measured by the  Physical Activity Scale for the Elderly  ( PASE ) was significantly associated with good walk rate and chair st and outcomes ( odds ratio per 40 units PASE [ 95 % confidence interval]=1.13 [ 1.13 , 1.17 ] and 1.10 [ 1.05 , 1.15 ] , respectively ) , as were participation in sports/recreational activities ( 1.45 [ 1.23 , 1.71 ] and 1.29 [ 1.09 , 1.51 ] , respectively ) and lifestyle activities ( 1.11 [ 1.06 , 1.16 ] and 1.09 [ 1.04 , 1.14 ] , respectively ) . An independent protective relationship for these physical activity measures approached significance after adjusting for sociodemographic and health factors . Older adults reported the least baseline physical activity and least frequent good 1-year outcomes . CONCLUSIONS These findings support public health recommendations to be physically active in order to preserve function for persons with knee OA .  Physical activity messages should specifically target older adults whose low activity levels may jeopardize their ability to maintain functional performance
For patients with knee OA there is limited evidence that a lower level of physical function is associated with a lower level of physical activity .
There is also limited evidence that depression is not associated with the level of physical activity .
For patients with hip OA there is limited evidence that higher age , higher body mass index ( BMI ) and a low level of physical function is associated with a low level of physical activity .
CONCLUSION A high age ( hip OA ) , a high BMI ( hip OA ) and a low level of physical function ( both hip and knee OA ) are related to a low level of physical activity .
OBJECTIVE To give an overview of factors related to the level of physical activity  in patients with hip or knee osteoarthritis ( OA ) .