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Trajectories of adherence to home-based exercise programs among people with knee osteoarthritis
Purpose: Exercise is the cornerstone of optimal non-surgical management of knee osteoarthritis (OA). However, for exercise interventions to be successful adherence is crucial. Given that adherence to exercise among people with knee OA is influenced by a vast array of factors, it is unsurprising that exercise adherence varies across individuals. Identifying distinct exercise adherence trajectories among people with knee OA allows a better understanding of how adherence to exercise typically changes over time, and may facilitate identification of individuals most at risk of poor or declining exercise adherence, who may benefit from interventions specifically designed to boost exercise adherence at particular time points. The aim of this study was to investigate the presence of groups showing different trajectories of self-reported adherence to home exercise programs among people with knee OA, and to compare baseline characteristics across identified groups. Methods: We performed a pooled analysis of data from three randomised controlled trials involving exercise interventions for people aged ≥50 years with clinical knee OA (n = 331) in Australia. Exercise adherence was self-reported on an 11-point numerical rating scale (NRS, 0 = not at all, 10 = completely as instructed) reflecting on the previous 12 week period from 12 weeks up to 78 weeks from baseline. Latent class growth analysis was used to identify groups of participants with distinct trajectories of adherence. The optimal model was identified by initially fitting a single-group model, then successively increasing the number of groups until model estimation failed. The model with the lowest Bayesian information criterion (BIC) was selected as the optimal model. Baseline characteristics of these groups were compared using chi-squared tests, one-way ANOVA and Kruskal Wallis tests where appropriate. Results: The optimal model identified three groups of participants with distinct trajectories of home exercise adherence over time: one whose adherence rapidly declined and then remained poor (Group 1 termed “Rapidly declining adherence”, n = 157, 47.4% of the cohort), a second group whose adherence started high and declined gradually over time (Group 2 termed “Gradually declining adherence”, n = 153, 45.1% of the cohort), and a small third group whose adherence was poor throughout (Group 3 termed “Low adherence”, n = 21, 6.3% of the cohort). Mean adherence was higher in the “Gradually declining adherence” group compared to the “Rapidly declining adherence” and “Low adherence” groups at all time points. At baseline the “Rapidly declining adherence” group reported significantly lower WOMAC pain (mean difference (95%CI) −0.8 (−1.4, −0.2)) and better WOMAC function (−3.1 (−5.2, −1.1) compared to the “Gradually declining adherence” group. In addition the “Low adherence” group reported borderline significantly poorer self-efficacy in managing their OA symptoms compared to the “Rapidly declining adherence” group (mean difference (95%CI) 1.9 (0.0, 3.8)). Conclusions: Three distinct trajectories of self-reported adherence to prescribed home exercise among people with knee OA were found. Few baseline characteristics differed between these groups, and in this cohort these differences between groups were small. Our results highlight the need for close monitoring of adherence from initiation of a home exercise program in order to identify and intervene with participants following a low or rapidly declining adherence trajectory.
Trajectories of adherence to home-based exercise programs among people with knee osteoarthritis.
OBJECTIVE: To investigate the presence of different trajectories of self-reported adherence to home exercise programs among people with knee osteoarthritis (OA), and to compare baseline characteristics across identified groups. DESIGN: Pooled analysis of data from three randomised controlled trials involving exercise interventions for people aged ≥50 years with clinical knee OA (n = 341). Exercise adherence was self-reported on an 11-point numerical rating scale (NRS; 0 = not at all-10 = completely as instructed). Latent class growth analysis was used to identify distinct trajectories of adherence, at intervals from 12 to 78 weeks from baseline. Baseline characteristics of these groups were compared using chi-squared tests, one-way analysis of variance (ANOVA) and Kruskal Wallis tests where appropriate. RESULTS: Three distinct adherence trajectories were identified: a "Rapidly declining adherence" group (n = 157, 47.4%) whose adherence was 7.7 ± 1.6 (/10) at 12 weeks, declined to 4.2 ± 2.2 by 22 weeks and remained low thereafter; a "Gradually declining adherence" group (n = 153, 45.1%) whose adherence declined from 8.5 ± 1.5 to 7.8 ± 1.5 over the same period, and continued to decline slowly, and a "Low adherence" group (n = 21, 6.3%) whose adherence was 2.2 ± 1.4 at 12 weeks and remained low. At baseline the "Rapidly declining adherence" group reported significantly lower Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain (mean difference (95% Confidence Interval (CI)) -0.8 (-1.4, -0.2)) and better WOMAC function compared to the "Gradually declining adherence" group (-3.1 (-5.2, -1.1)). CONCLUSION: Three trajectories of self-reported adherence to home exercises were found among people with knee OA. Findings highlight the need for close monitoring of adherence from initiation of a home exercise program in order to identify and intervene when low or rapidly declining adherence is identified.
Improving Adherence to Exercise: Do People With Knee Osteoarthritis and Physical Therapists Agree on the Behavioral Approaches Likely to Succeed?
OBJECTIVE: To describe which behavior change techniques (BCTs) to promote adherence to exercise have been experienced by people with knee osteoarthritis (OA) or used by physical therapists, and to describe patient- and physical therapist-perceived effectiveness of a range of BCTs derived from behavioral theory. METHODS: Two versions of a custom-designed survey were administered in Australia and New Zealand, one completed by adults with symptomatic knee OA and the second by physical therapists who had treated people with knee OA in the past 6 months. Survey questions ascertained the frequency of receiving/prescribing exercise for knee OA, BCTs received/used targeting adherence to exercise, and perceived effectiveness of 36 BCTs to improve adherence to prescribed exercise. RESULTS: A total of 230 people with knee OA and 143 physical therapists completed the survey. Education about the benefits of exercise was the most commonly received/used technique by both groups. People with knee OA rated the perceived effectiveness of all BCTs significantly lower than the physical therapists (mean difference 1.9 [95% confidence interval 1.8-2.0]). When ranked by group mean agreement score, 2 BCTs were among the top 5 for both groups: development of specific goals related to knee pain and function; and review, supervision, and correction of exercise technique at subsequent treatment sessions. CONCLUSION: Goal-setting techniques related to outcomes were considered to be effective by both respondent groups, and testing of interventions incorporating these strategies should be a research priority.
Utility of clinical tests to diagnose MRI-confirmed gluteal tendinopathy in patients presenting with lateral hip pain.
PURPOSE: Gluteal tendinopathy (GT) is a source of lateral hip pain, yet common clinical diagnostic tests have limited validity. Patients with GT are often misdiagnosed, resulting in inappropriate management, including surgery. This study determined the diagnostic utility of clinical tests for GT, using MRI as the reference standard. METHODS: 65 participants with lateral hip pain were examined to evaluate the ability of clinical tests to detect MRI-determined GT (an increase in intratendinous signal intensity on T2-weighted images). Palpation of the greater trochanter and several clinical pain provocation tests applying compressive and tensile loads on the gluteal tendons were investigated. MRI of the painful hip was examined by a radiologist, blind to clinical findings. RESULTS: Pain reported within 30 s of standing on the affected limb conclusively moves a (nominal) 50% pretest probability of GT presence on MRI to a post-test probability of 98% (specificity 100%, positive likelihood ratio ∼12), whereas no pain on palpation (80% sensitivity) would rule out its presence. 20 participants (31%) had GT on MRI but clinically negative (ie, not positive on palpation and another test). CONCLUSIONS: Keeping in mind that the sample size was small (ie, possibly underpowered for indices of diagnostic utility with low precision), the results of this study indicate that a patient who reports lateral hip pain within 30 s of single-leg-standing is very likely to have GT. Patients with lateral hip pain who are not palpably tender over the greater trochanter are unlikely to have MRI-detected GT.
Use of nondrug, nonoperative interventions by community-dwelling people with hip and knee osteoarthritis.
OBJECTIVE: Guidelines recommend nondrug, nonoperative treatments as the first-line approach for hip and knee osteoarthritis (OA), yet there is limited data regarding use of these treatments in OA. This study describes the use of nondrug, nonoperative interventions in people with hip and knee OA. METHODS: A convenience sample of 591 people with hip or knee OA completed a questionnaire indicating their past and/or current use of 17 nondrug, nonoperative interventions each for their hip or knee OA. Descriptive analyses, based on frequency counts and proportions, and chi-square tests described the use of each intervention in the total cohort, and within subgroups of knee and hip OA. RESULTS: Participants were currently using a mean ± SD of 0.8 ± 0.9 of the strongly recommended interventions. Making efforts to lose weight (50%, n = 294) and shoe orthoses (30%, n = 175) were the most common currently used interventions. Strengthening (26%, n = 152) and stretching exercises (23%, n = 133) were the most common interventions that participants had tried in the past but were no longer utilizing. Of note, 12% (n = 71) had never used any of the interventions. Use of 5 treatments (shoe orthoses, heat and/or cold, muscle strengthening exercises, walking aids, and transcutaneous electrical nerve stimulation) was significantly different between the hip and knee cohorts (P < 0.05). CONCLUSION: Use of nondrug, nonoperative interventions was low among people with hip and knee OA. Our findings show evidence–practice gaps, particularly with respect to the interventions most strongly recommended in clinical guidelines for hip and knee OA (weight loss and exercise).
Self-reported Home Exercise Adherence: A Validity and Reliability Study Using Concealed Accelerometers.
BACKGROUND: Accurate measurement of adherence to prescribed exercise programs is essential. Diaries and self-report rating scales are commonly used, yet little evidence exists to demonstrate their validity and reliability. OBJECTIVES: To examine the concurrent validity of adherence to home strengthening exercises measured by (1) exercise diaries and (2) a self-report rating scale, compared to adherence measured using an accelerometer concealed in an ankle cuff weight. Test-retest reliability of the self-report rating scale was also assessed. METHODS: In this clinical measurement study, 54 adults aged 45 years or older with self-reported chronic knee pain were prescribed a home quadriceps-strengthening program. Over 12 weeks, participants completed paper exercise diaries and, at appointments every 2 weeks, rated their adherence on an 11-point numeric rating scale. A triaxial accelerometer was concealed in the ankle cuff weight used for exercises. Self-reported adherence rating scale data over each 2-week period were analyzed using descriptive statistics, the Wilcoxon signed-rank test, and a Bland-Altman plot to assess agreement, Spearman correlations for validity, and intraclass correlation coefficients for test-retest reliability. RESULTS: Exercise adherence was significantly overestimated in diaries during the 12 weeks (diary median, 220 exercises; accelerometer, 176; P
Education plus exercise versus corticosteroid injection use versus a wait and see approach on global outcome and pain from gluteal tendinopathy: prospective, single blinded, randomised clinical trial.
OBJECTIVE: To compare the effects of a programme of load management education plus exercise, corticosteroid injection use, and no treatment on pain and global improvement in individuals with gluteal tendinopathy. DESIGN: Prospective, three arm, single blinded, randomised clinical trial. SETTING: Brisbane and Melbourne, Australia. PARTICIPANTS: Individuals aged 35-70 years, with lateral hip pain for more than three months, at least 4/10 on the pain numerical rating scale, and gluteal tendinopathy confirmed by clinical diagnosis and magnetic resonance imaging; and with no corticosteroid injection use in previous 12 months, current physiotherapy, total hip replacement, or neurological conditions. INTERVENTIONS: A physiotherapy led education and exercise programme of 14 sessions over eight weeks (EDX; n=69), one corticosteroid injection (CSI; n=66), and a wait and see approach (WS; n=69). MAIN OUTCOMES: Primary outcomes were patient reported global rating of change in hip condition (on an 11 point scale, dichotomised to success and non-success) and pain intensity in the past week (0=no pain, 10=worst pain) at eight weeks, with longer term follow-up at 52 weeks. RESULTS: Of 204 randomised participants (including 167 women; mean age 54.8 years (standard deviation 8.8)), 189 (92.6%) completed 52 week follow-up. Success on the global rating of change was reported at eight weeks by 51/66 EDX, 38/65 CSI, and 20/68 WS participants. EDX and CSI had better global improvement scores than WS (risk difference 49.1% (95% confidence interval 34.6% to 63.5%), number needed to treat 2.0 (95% confidence interval 1.6 to 2.9); 29.2% (13.2% to 45.2%), 3.4 (2.2 to 7.6); respectively). EDX had better global improvement scores than CSI (19.9% (4.7% to 35.0%); 5.0 (2.9 to 21.1)). At eight weeks, reported pain on the numerical rating scale was mean score 1.5 (standard deviation 1.5) for EDX, 2.7 (2.4) for CSI, and 3.8 (2.0) for WS. EDX and CSI participants reported less pain than WS (mean difference -2.2 (95% confidence interval -2.89 to -1.54); -1.2 (-1.85 to -0.50); respectively), and EDX participants reported less pain than CSI (-1.04 (-1.72 to -0.37)). Success on the global rating of change was reported at 52 weeks by 51/65 EDX, 36/63 CSI, and 31/60 WS participants; EDX was better than CSI (20.4% (4.9% to 35.9%); 4.9 (2.8 to 20.6)) and WS (26.8% (11.3% to 42.3%); 3.7 (2.4 to 8.8)). Reported pain at 52 weeks was 2.1 (2.2) for EDX, 2.3 (1.9) for CSI, and 3.2 (2.6) for WS; EDX did not differ from CSI (-0.26 (-1.06 to 0.55)), but both treatments did better than WS (1.13 (-1.93 to -0.33); 0.87 (-1.68 to -0.07); respectively). CONCLUSIONS: For gluteal tendinopathy, education plus exercise and corticosteroid injection use resulted in higher rates of patient reported global improvement and lower pain intensity than no treatment at eight weeks. Education plus exercise performed better than corticosteroid injection use. At 52 week follow-up, education plus exercise led to better global improvement than corticosteroid injection use, but no difference in pain intensity. These results support EDX as an effective management approach for gluteal tendinopathy. TRIAL REGISTRATION: Prospectively registered at the Australian New Zealand Clinical Trials Registry (ACTRN12612001126808).
Predictors and Measures of Adherence to Core Treatments for Osteoarthritis.
Adherence has been proposed as a major barrier to implementing and maintaining the benefits of osteoarthritis (OA) core treatments and is influenced by many factors. Although there are reasonable data to support factors influencing adherence to exercise/physical activity in knee/hip OA populations, there is less research examining alternative interventions, or in the hand OA population. This problem is complicated by the lack of gold-standard measurement of adherence for core osteoarthritis treatments. The predictors of treatment adherence are not well understood, and findings are contradictory. Strategies incorporating behavior change techniques should be implemented to improve and maintain long-term adherence.
PARTNER: a service delivery model to implement optimal primary care management of people with knee osteoarthritis: description of development.
OBJECTIVE: Implementation strategies, such as new models of service delivery, are needed to address evidence practice gaps. This paper describes the process of developing and operationalising a new model of service delivery to implement recommended care for people with knee osteoarthritis (OA) in a primary care setting. METHODS: Three development stages occurred concurrently and iteratively. Each stage considered the healthcare context and was informed by stakeholder input. Stage 1 involved the design of a new model of service delivery (PARTNER). Stage 2 developed a behavioural change intervention targeting general practitioners (GPs) using the behavioural change wheel framework. In stage 3, the 'Care Support Team' component of the service delivery model was operationalised. RESULTS: The focus of PARTNER is to provide patients with education, exercise and/or weight loss advice, and facilitate effective self-management through behavioural change support. Stage 1 model design: based on clinical practice guidelines, known evidence practice gaps in current care, chronic disease management frameworks, input from stakeholders and the opportunities and constraints afforded by the Australian primary care context, we developed the PARTNER service-delivery model. The key components are: (1) an effective GP consultation and (2) follow-up and ongoing care provided remotely (telephone/email/online resources) by a 'Care Support Team'. Stage 2 GP behavioural change intervention: a multimodal behavioural change intervention was developed comprising a self-audit/feedback activity, online professional development and desktop software to provide decision support, patient information resources and a referral mechanism to the 'Care Support Team'. Stage 3 operationalising the 'care support team'-staff recruited and trained in evidence-based knee OA management and behavioural change methodology. CONCLUSION: The PARTNER model is the result of a comprehensive implementation strategy development process using evidence, behavioural change theory and intervention development guidelines. Technologies for scalable delivery were harnessed and new primary evidence was generated as part of the process.Trial registration number ACTRN12617001595303 (UTN U1111-1197-4809).
Risk Factors for Mobility Decline in Community-Dwelling Older Adults: A Systematic Literature Review.
Mobility is essential to maintaining independence for older adults. This systematic review aimed to summarize evidence about self-reported risk factors for self-reported mobility decline; and to provide an overview of published prognostic models for self-reported mobility decline among community-dwelling older adults. Databases were searched from inception to June 2, 2020. Studies were screened by two independent reviewers who extracted data and assessed study quality. Sixty-one studies (45,187 participants) were included, providing information on 107 risk factors. High-quality evidence and moderate/large effect sizes for the association with mobility decline were found for older age beyond 75 years, the presence of widespread pain, and mobility modifications. Moderate-high quality evidence and small effect sizes were found for a further 21 factors. Three model development studies demonstrated acceptable model performance, limited by high risk of bias. These findings should be considered in intervention development, and in developing a prediction instrument for practical application.
Essential key messages about diagnosis, imaging, and self-care for people with low back pain: a modified Delphi study of consumer and expert opinions.
People with back pain regularly search for information online; however, the quality of this online information is often poor. We established a list of the most important messages about diagnosis, imaging, and self-care for people with low back pain, based on consensus opinion and prioritised in order of importance. A list of key messages was derived from clinical practice guidelines for back pain. During 2 survey rounds, a Delphi panel of consumers with back pain and experts rated the importance of each item and suggested additional statements. Messages were retained that were rated as important by more than 70% of the panel. Retained messages were reviewed by consumer focus groups. A priority pairwise ranking activity determined the rank order of the important messages. A final online survey determined the robustness and currency of the final list of statements. The Delphi process and consumer focus groups resulted in 30 unique messages. Experts considered that the most important messages for patients are (1) remain active and (2) reassurance that back pain is a normal experience and not necessarily related to serious harm. This differed from the preferences of people with back pain who prioritised messages related to (1) identification of more serious pathology and (2) principles of management. This list of important key messages about diagnosis, imaging, and general self-care for people with back pain can be used to inform the development of education resources, including new web sites, as well as to direct clinicians in the information they provide to patients.
Synergistic effects of hip/knee osteoarthritis and comorbidities on mobility and self-care limitations among older adults: Cross-sectional analysis of the Oxford pain, Activity and Lifestyle study.
OBJECTIVE: To estimate synergistic effects of hip/knee osteoarthritis (OA) and comorbidities on mobility or self-care limitations among older adults. METHODS: We used baseline, cross-sectional data from the Oxford Pain, Activity and Lifestyle (OPAL) study. Participants were community-dwelling adults aged 65 years or older who completed a postal questionnaire. Participants reported demographic information, hip/knee OA, comorbidities and mobility and self-care limitations. We used modified Poisson regression models to estimate the independent and combined relative risks (RR) of mobility or self-care limitations, the relative excess risk due to interaction (RERI) between hip/knee OA and comorbidities, attributable proportion of the risk due to the interaction and the ratio of the combined effect and the sum of the individual effects, known as the synergy index. RESULTS: Of the 4,972 participants included, 1,532 (30.8%) had hip/knee OA, and of them 42.9% reported mobility limitations and 8.4% reported self-care limitations. Synergistic effects impacting self-care limitations were observed between hip/knee OA and anxiety (RR: 3.09, 95% Confidence Interval (CI): 2.00 to 4.78; RERI: 0.93, 95% CI: 0.01 to 1.90), and between hip/knee OA and depressive symptoms (RR: 2.71, 95% CI: 1.75 to 4.20; RERI: 0.58, 95% CI: 0.03 to 1.48). The portion of the total RR attributable to this synergism was 30% and 22% respectively. CONCLUSIONS: This study demonstrates that synergism between hip/knee OA and anxiety or depressive symptoms contribute to self-care limitations. These findings highlight the importance of assessing and addressing anxiety or depressive symptoms when managing older adults with hip/knee OA to minimize self-care limitations.
Musculoskeletal pain and loneliness, social support and social engagement among older adults: Analysis of the Oxford Pain, Activity and Lifestyle cohort.
BACKGROUND: Musculoskeletal (MSK) pain is common in older adults. Physical and psychological consequences of MSK pain have been established, but it is also important to consider the social impact. We aimed to estimate the association between MSK pain and loneliness, social support and social engagement. METHODS: We used baseline data from the Oxford Pain, Activity and Lifestyle study. Participants were community-dwelling adults aged 65 years or older from across England. Participants reported demographic information, MSK pain by body site, loneliness, social support and social engagement. We categorised pain by body regions affected (upper limb, lower limb and spinal). Widespread pain was defined as pain in all three regions. We used logistic regression models to estimate associations between distribution of pain and social factors, controlling for covariates. RESULTS: Of the 4977 participants analysed, 4193 (84.2%) reported any MSK pain, and one-quarter (n = 1298) reported widespread pain. Individuals reporting any pain were more likely to report loneliness (OR [odds ratio]: 1.62; 95% CI [confidence interval]: 1.32-1.97) or insufficient social support (OR: 1.54; 95% CI: 1.08-2.19) compared to those reporting no pain. Widespread pain had the strongest association with loneliness (OR: 1.94; 95% CI: 1.53-2.46) and insufficient social support (OR: 1.71; 95% CI: 1.14-2.54). Pain was not associated with social engagement. CONCLUSIONS: Older adults commonly report MSK pain, which is associated with loneliness and perceived insufficiency of social support. This finding highlights to clinicians and researchers the need to consider social implications of MSK pain in addition to physical and psychological consequences.