Session Type: Poster Session (Tuesday)
Session Time: 9:00AM-11:00AM
Background/Purpose: The 2018 Physical Activity (PA) Guidelines no longer require PA to occur in bouts of ≥ 10 minutes for meeting the weekly 150-min moderate-to-vigorous PA (MVPA) recommendations. In persons with lower limb joint symptoms, attaining 60-min weekly MVPA is linked to maintaining disability-free status over 4 years. This benchmark serves as an achievable intermediate step toward meeting guidelines and motivates those with chronic knee pain and/or function limitations to engage in PA. In persons with radiographic knee OA (KOA), 13% men and 8% women met the legacy 2008 PA Guidelines. It is unknown what proportions of men and women with or at high risk for KOA meet the updated 2018 Guidelines (150-min weekly MVPA) and the disability-free threshold (60-min weekly MVPA). Factors associated with meeting each threshold have not been examined. We aimed to (1) describe the prevalence of attaining ≥ 150-min and ≥ 60-min weekly MVPA; and (2) determine factors associated with attaining each of the PA recommendations, in persons with or at high risk for KOA.
Methods: 1922 OAI (Osteoarthritis Initiative) participants with valid accelerometer monitoring at 48-month OAI visit were included in the analysis sample. We computed weekly unbouted MVPA minutes for each participant. Radiographic KOA was defined as ≥ K/L 2 in at least 1 knee; symptomatic KOA defined as aching or stiffness for at least half of the days of a month (in the past year) in at least 1 knee. Descriptive summaries of weekly MVPA minutes are presented separately for men and women. To identify factors associated with attaining 150-min and 60-min MVPA respectively, we performed multivariate ordered logistic regressions, controlling for age, sex, BMI, race, education, depression, comorbidity, and radiographic/symptomatic KOA.
Results: In those with or at high risk for KOA, 44% men vs. 22% women had ≥ 150 weekly MVPA minutes; 67% men vs. 50% women had ≥ 60 minutes. In those with radiographic KOA, 41% men vs. 20% women had ≥ 150 minutes; 62% men vs. 47% women had ≥ 60 minutes. In those with symptomatic KOA, 41% men vs. 16% women had ≥ 150 minutes; 65% men vs. 45% women had ≥ 60 minutes (Table 1). Being a woman, older, obese, overweight, non-White, depressed; and having ≥ 2 comorbidities and both radiographic and symptomatic KOA was each associated with reduced likelihood of attaining the 150-min threshold. Being a woman, older, obese, overweight, non-college graduate, depressed; and having any comorbidity was each associated with reduced likelihood of attaining the 60-minute threshold.
Conclusion: The proportion of men and women meeting guidelines tripled based the updated 2018 PA Guidelines vs. the legacy 2008 Guidelines. The disparity between sexes widened; twice as many men attained the updated guidelines than women. PA interventions may explore strategies to engage women, non-Whites, and non-college graduates and target modifiable factors of BMI, depression, and symptom managements.
To cite this abstract in AMA style:Chang A, Song J, Lee J, Chang R, Semanik P, Dunlop D. Impact of Eliminating the Bouted Minutes Requirement in the New 2018 Physical Activity Guidelines for Americans on Gender Disparity in Guideline Attainment for Persons with or at High Risk of Knee Osteoarthritis [abstract]. Arthritis Rheumatol. 2019; 71 (suppl 10). https://acrabstracts.org/abstract/impact-of-eliminating-the-bouted-minutes-requirement-in-the-new-2018-physical-activity-guidelines-for-americans-on-gender-disparity-in-guideline-attainment-for-persons-with-or-at-high-risk-of-knee-ost/. Accessed April 14, 2021.
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