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Smith, Toby O. 
ORCID: https://orcid.org/0000-0003-1673-2954, Dainty, Jack R. ORCID: https://orcid.org/0000-0002-0056-1233 and MacGregor, Alex ORCID: https://orcid.org/0000-0003-2163-2325
(2017)
Trajectory of physical activity following total hip and knee arthroplasty: data from the English Longitudinal Study of Ageing (ELSA) cohort.
European Journal of Physiotherapy, 19 (4).
pp. 201-206.
ISSN 2167-9169
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Abstract
Purpose: To determine the prevalence and trajectory of physical activity levels in people before and after total hip (THA) and total knee arthroplasty (TKA). Materials and Methods: An analysis of the English Longitudinal Study of Ageing (ELSA) (2004/5 to 2014/15) cohort study, a prospective study of community-dwelling older adults. 201 people who received a THA or TKA for the management of osteoarthritis were identified. Physical activity was assessed through the frequency of engagement in sedentary, mild, moderate and high physical activity levels pre-operatively, during the recovery phase and a minimum of two years’ post-operatively. Results: There was a statistically significant decrease in physical activity from the pre-arthroplasty phase to the operative-recovery phase (p<0.01), and a significant increase in physical activity from the operative-recovery phase to final follow-up (p=0.05). However, overall there was no significant change in physical activity from pre-operatively to final follow-up where prevalence altered from 8% (95% Confidence Intervals (CI): 5% to 12%) to 13% (95% CI: 9% to 18%)(p=0.15). Increasing age, male gender and greater depressive symptoms were explanatory variables associated with physical inactivity (p<0.02). Conclusion: Physical activity does not increase following THA or TKA. A proportion of the arthroplasty population remain physically inactive.
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