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Observational Study
. 2020 Jun;28(6):774-781.
doi: 10.1016/j.joca.2020.03.007. Epub 2020 Mar 18.

Proportion and associated factors of meeting the 2018 Physical Activity Guidelines for Americans in adults with or at risk for knee osteoarthritis

A H Chang  1 , J Song  2 , J Lee  3 , R W Chang  4 , P A Semanik  5 , D D Dunlop  6
Affiliations
Observational Study

Proportion and associated factors of meeting the 2018 Physical Activity Guidelines for Americans in adults with or at risk for knee osteoarthritis

A H Chang et al. Osteoarthritis Cartilage. 2020 Jun.

Abstract

Objectives: Evaluate the prevalence of meeting the updated 2018 Physical Activity Guidelines for Americans (150 unbouted minutes in moderate-to-vigorous intensity physical activity [MVPA]) and determine cross-sectional factors associated with Guideline attainment in a community-based cohort of adults with or at elevated risk for knee osteoarthritis (OA).

Methods: Physical activity was monitored for 1 week in a subset of Osteoarthritis Initiative (OAI) participants with or at increased risk for knee OA. Accelerometer-measured weekly MVPA minutes were calculated; sociodemographic (age, sex, race, education, and working status) and health-related (body mass index [BMI], comorbidity, depressive symptoms, radiographic knee OA, and frequent knee symptoms) factors were assessed. We evaluated the prevalence of meeting 2018 Guidelines and used multivariate partial proportional odds model to identify factors associated with Guideline attainment, controlling for other factors in the model.

Results: Among 1922 participants (age 65.1 [standard deviation 9.1] years, BMI 28.4 [4.8] kg/m2, 55.2% women), 44.1% men and 22.2% women met the 2018 PA Guidelines. Adjusted cross-sectional factors associated with not-meeting 2018 Guidelines were: women, older age, higher BMI, non-Whites, depressive symptoms, not working, and frequent knee symptoms.

Conclusion: In community-recruited adults with or at high risk for knee OA, more than 50% of men and nearly 80% of women failed to achieve the 2018 recommended level of at least 150 weekly unbouted minutes of MVPA. Study findings support gender and racial disparity in Guideline attainment and suggest addressing potentially modifiable factors (e.g., BMI, depressive symptoms, and frequent knee symptoms) to optimize benefits in PA-promoting interventions.

Keywords: Guidelines; Knee; Osteoarthritis; Physical activity.

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Conflict of interest statement

Competing interests: None declared.

The authors have no conflict of interest relevant to the reported work.

Figures

Figure 1.
Figure 1.
Analysis sample derivation.
Figure 2.
Figure 2.
In OAI participants with or at elevated risk for knee OA (n=1922), proportion of men and women meeting respective unbouted 150-min and 60-min weekly MVPA among 4 mutually exclusive groups: 1) those without either radiographic knee OA (RKOA) or frequent knee symptoms (Sx) (n=542), 2) those with RKOA but without Sx (n=617), 3) those with Sx but without RKOA (n=220), and 4) those with both RKOA and Sx (n=543).
See this image and copyright information in PMC

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