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Huber, M.B. ; Schneider, N. ; Kirsch, F. ; Schwarzkopf, L. ; Schramm, A.* ; Leidl, R.

Long-term weight gain in obese COPD patients participating in a disease management program: A risk factor for reduced health-related quality of life.

Respir. Res. 22:226 (2021)

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Background: Little is known about how long-term weight gain affects the health perception of COPD patients. Objectives: The aim is to evaluate the long-term association of BMI change and health-related quality of life (HRQoL) in obese COPD patients. Methods: Claims and survey data from a COPD disease management program were used to match two groups of COPD patients with BMI ≥ 30 who have differing weight trajectories over a 5-year timespan via propensity score and genetic matching. EQ-5D-5L, including visual analog scale (VAS) and COPD Assessment Test (CAT), were used as outcomes of interest. Sociodemographic and disease-based variables were matched. Results: Out of 1202 obese COPD patients, 126 with a weight increase of four or more BMI points were matched separately with 252 (propensity score matching) and 197 (genetic matching) control subjects who had relatively stable BMI. For the EQ-5D-5L, patients with BMI increase reported significantly worse health perception for VAS and all descriptive dimensions except pain/discomfort. For the CAT, especially the perception of ability to complete daily activities and overall energy results were significantly worse. VAS differences reach the range of minimal important differences. Stopping smoking and already being in obesity class II were the most influential risk factors for BMI increase. Conclusion: Obese COPD patients who gain four or more BMI points over 5 years report significantly lower results in different dimensions of generic and disease-specific HRQoL than their peers with stable BMI. To improve real-world outcomes, tracking and preventing specific BMI trajectories could constitute a clinically relevant aspect of managing COPD patients.

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