Dataset Information

Cost-Effectiveness of Diet and Exercise for Overweight and Obese Patients With Knee Osteoarthritis.

ABSTRACT:

Objective

The Intensive Diet and Exercise for Arthritis (IDEA) trial showed that an intensive diet and exercise (D+E) program led to a mean 10.6-kg weight reduction and 51% pain reduction in patients with knee osteoarthritis (OA). The aim of the current study was to investigate the cost-effectiveness of adding this D+E program to treatment in overweight and obese (body mass index >27 kg/m² ) patients with knee OA.

Methods

We used the Osteoarthritis Policy Model to estimate quality-adjusted life-years (QALYs) and lifetime costs for overweight and obese patients with knee OA, with and without the D+E program. We evaluated cost-effectiveness with the incremental cost-effectiveness ratio (ICER), a ratio of the differences in lifetime cost and QALYs between treatment strategies. We considered 3 cost-effectiveness thresholds: $50,000/QALY, $100,000/QALY, and $200,000/QALY. Analyses were conducted from health care sector and societal perspectives and used a lifetime horizon. Costs and QALYs were discounted at 3% per year. D+E characteristics were derived from the IDEA trial. Deterministic and probabilistic sensitivity analyses (PSAs) were used to evaluate parameter uncertainty and the effect of extending the duration of the D+E program.

Results

In the base case, D+E led to 0.054 QALYs gained per person and cost $1,845 from the health care sector perspective and $1,624 from the societal perspective. This resulted in ICERs of $34,100/QALY and $30,000/QALY. In the health care sector perspective PSA, D+E had 58% and 100% likelihoods of being cost-effective with thresholds of $50,000/QALY and $100,000/QALY, respectively.

Conclusion

Adding D+E to usual care for overweight and obese patients with knee OA is cost-effective and should be implemented in clinical practice.

SUBMITTER: Losina E

PROVIDER: S-EPMC6349519 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Publications

Cost-Effectiveness of Diet and Exercise for Overweight and Obese Patients With Knee Osteoarthritis.

Losina Elena E Smith Karen C KC Paltiel A David AD Collins Jamie E JE Suter Lisa G LG Hunter David J DJ Katz Jeffrey N JN Messier Stephen P SP

Arthritis care & research 20190701 7

<h4>Objective</h4>The Intensive Diet and Exercise for Arthritis (IDEA) trial showed that an intensive diet and exercise (D+E) program led to a mean 10.6-kg weight reduction and 51% pain reduction in patients with knee osteoarthritis (OA). The aim of the current study was to investigate the cost-effectiveness of adding this D+E program to treatment in overweight and obese (body mass index >27 kg/m<sup>2</sup> ) patients with knee OA.<h4>Methods</h4>We used the Osteoarthritis Policy Model to estim ...[more]

PMID: 30055077

Similar Datasets

Project description:ImportanceKnee osteoarthritis (OA), a common cause of chronic pain and disability, has biomechanical and inflammatory origins and is exacerbated by obesity.ObjectiveTo determine whether a ?10% reduction in body weight induced by diet, with or without exercise, would improve mechanistic and clinical outcomes more than exercise alone.Design, setting, and participantsSingle-blind, 18-month, randomized clinical trial at Wake Forest University between July 2006 and April 2011. The diet and exercise interventions were center-based with options for the exercise groups to transition to a home-based program. Participants were 454 overweight and obese older community-dwelling adults (age ?55 years with body mass index of 27-41) with pain and radiographic knee OA.InterventionsIntensive diet-induced weight loss plus exercise, intensive diet-induced weight loss, or exercise.Main outcomes and measuresMechanistic primary outcomes: knee joint compressive force and plasma IL-6 levels; secondary clinical outcomes: self-reported pain (range, 0-20), function (range, 0-68), mobility, and health-related quality of life (range, 0-100).ResultsThree hundred ninety-nine participants (88%) completed the study. Mean weight loss for diet + exercise participants was 10.6 kg (11.4%); for the diet group, 8.9 kg (9.5%); and for the exercise group, 1.8 kg (2.0%). After 18 months, knee compressive forces were lower in diet participants (mean, 2487 N; 95% CI, 2393 to 2581) compared with exercise participants (2687 N; 95% CI, 2590 to 2784, pairwise difference [?](exercise vs diet?)=?200 N; 95% CI, 55 to 345; P?=?.007). Concentrations of IL-6 were lower in diet + exercise (2.7 pg/mL; 95% CI, 2.5 to 3.0) and diet participants (2.7 pg/mL; 95% CI, 2.4 to 3.0) compared with exercise participants (3.1 pg/mL; 95% CI, 2.9 to 3.4; ?(exercise vs diet + exercise)?=?0.39 pg/mL; 95% CI, -0.03 to 0.81; P?=?.007; ?(exercise vs diet?)=?0.43 pg/mL; 95% CI, 0.01 to 0.85, P?=?.006). The diet + exercise group had less pain (3.6; 95% CI, 3.2 to 4.1) and better function (14.1; 95% CI, 12.6 to 15.6) than both the diet group (4.8; 95% CI, 4.3 to 5.2) and exercise group (4.7; 95% CI, 4.2 to 5.1, ?(exercise vs diet + exercise)?=?1.02; 95% CI, 0.33 to 1.71; P(pain)?=?.004; 18.4; 95% CI, 16.9 to 19.9; ?(exercise vs diet + exercise), 4.29; 95% CI, 2.07 to 6.50; P(function?)<?.001). The diet + exercise group (44.7; 95% CI, 43.4 to 46.0) also had better physical health-related quality of life scores than the exercise group (41.9; 95% CI, 40.5 to 43.2; ?(exercise vs diet + exercise)?=?-2.81; 95% CI, -4.76 to -0.86; P?=?.005).Conclusions and relevanceAmong overweight and obese adults with knee OA, after 18 months, participants in the diet + exercise and diet groups had more weight loss and greater reductions in IL-6 levels than those in the exercise group; those in the diet group had greater reductions in knee compressive force than those in the exercise group.Trial registrationclinicaltrials.gov Identifier: NCT00381290.

Project description:ImportanceSome weight loss and exercise programs that have been successful in academic center-based trials have not been evaluated in community settings.ObjectiveTo determine whether adaptation of a diet and exercise intervention to community settings resulted in a statistically significant reduction in pain, compared with an attention control group, at 18-month follow-up.Design, setting, and participantsAssessor-blinded randomized clinical trial conducted in community settings in urban and rural counties in North Carolina. Patients were men and women aged 50 years or older with knee osteoarthritis and overweight or obesity (body mass index ≥27). Enrollment (N = 823) occurred between May 2016 and August 2019, with follow-up ending in April 2021.InterventionsPatients were randomly assigned to either a diet and exercise intervention (n = 414) or an attention control (n = 409) group for 18 months.Main outcomes and measuresThe primary outcome was the between-group difference in the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) knee pain score (range, 0 [none] to 20 [severe]; minimum clinically important difference, 1.6) over 18 months, tested using a repeated-measures mixed linear model with adjustments for covariates. There were 7 secondary outcomes including body weight.ResultsAmong the 823 randomized patients (mean age, 64.6 years; 637 [77%] women), 658 (80%) completed the trial. At 18-month follow-up, the adjusted mean WOMAC pain score was 5.0 in the diet and exercise group (n = 329) compared with 5.5 in the attention control group (n = 316) (adjusted difference, -0.6; 95% CI, -1.0 to -0.1; P = .02). Of 7 secondary outcomes, 5 were significantly better in the intervention group compared with control. The mean change in unadjusted 18-month body weight for patients with available data was -7.7 kg (8%) in the diet and exercise group (n = 289) and -1.7 kg (2%) in the attention control group (n = 273) (mean difference, -6.0 kg; 95% CI, -7.3 kg to -4.7 kg). There were 169 serious adverse events; none were definitely related to the study. There were 729 adverse events; 32 (4%) were definitely related to the study, including 10 body injuries (9 in diet and exercise; 1 in attention control), 7 muscle strains (6 in diet and exercise; 1 in attention control), and 6 trip/fall events (all 6 in diet and exercise).Conclusions and relevanceAmong patients with knee osteoarthritis and overweight or obesity, diet and exercise compared with an attention control led to a statistically significant but small difference in knee pain over 18 months. The magnitude of the difference in pain between groups is of uncertain clinical importance.Trial registrationClinicalTrials.gov Identifier: NCT02577549.

Project description:ObjectivesTo evaluate the 1-year cost-effectiveness of strength exercise or aerobic exercise compared with usual care for patients with symptomatic knee osteoarthritis (OA), from a societal and healthcare perspective.DesignCost-effectiveness analysis embedded in a three-arm randomised controlled trial.Participants and settingA total of 161 people with symptomatic knee OA seeking Norwegian primary or secondary care were included in the analyses.InterventionsParticipants were randomised to either 12 weeks of strength exercise (n=54), 12 weeks of aerobic exercise (n=53) or usual care (n=54).Outcome measuresQuality-adjusted life-years (QALYs) estimated by the EuroQol-5 Dimensions-5 Levels, and costs related to healthcare utilisation and productivity loss estimated in euros (€), aggregated for 1 year of follow-up. Cost-effectiveness was expressed with mean incremental cost-effectiveness ratios (ICERs). Bootstrapping was used to estimate ICER uncertainty.ResultsFrom a 1-year societal perspective, the mean cost per patient was €7954, €8101 and €17 398 in the strength exercise, aerobic exercise and usual care group, respectively. From a 1-year healthcare perspective, the mean cost per patient was €848, €2003 and €1654 in the strength exercise, aerobic exercise and usual care group, respectively. Mean differences in costs significantly favoured strength exercise and aerobic exercise from a 1-year societal perspective and strength exercise from a 1-year healthcare perspective. There were no significant differences in mean QALYs between groups. From a 1-year societal perspective, at a willingness-to-pay threshold of €27 500, the probability of strength exercise or aerobic exercise being cost-effective was ≥98%. From a 1-year healthcare perspective, the probability of strength exercise or aerobic exercise being cost-effective was ≥97% and ≥76%, respectively.ConclusionFrom a 1-year societal and healthcare perspective, a 12-week strength exercise or aerobic exercise programme is cost-effective compared with usual care in patients with symptomatic knee OA.Trial registration numberNCT01682980.

Dataset Information

Cost-Effectiveness of Diet and Exercise for Overweight and Obese Patients With Knee Osteoarthritis.

Objective

Methods

Results

Conclusion

Publications

Cost-Effectiveness of Diet and Exercise for Overweight and Obese Patients With Knee Osteoarthritis.

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