Citation: | Chathuri T. Sandamali, Wenjing Zhang. MODELING AND ANALYSIS OF SOCIAL OBESITY EPIDEMIC[J]. Journal of Applied Analysis & Computation, 2024, 14(2): 1023-1045. doi: 10.11948/20230282 |
Overweight and obesity have become a global epidemic due to increasing unhealthy eating habits and sedentary lifestyles. An individual can gain weight excessively through social influence, and understanding its underlying interpersonal dynamics is crucial for effective intervention and prevention programs. By considering the social effects on weight gain, this paper presents a compartment model to describe the social spread of overweight and obesity. Bifurcation analysis suggests that a backward bifurcation exists when the relative hazard of weight regain is a larger value. Strategies for eliminating the overweight and obesity epidemic are provided by analyzing the obesity-free equilibrium globally by incorporating Lyapunov functions and the method of fluctuations. Since the pervasiveness of overweight and obesity in the United States seems to be stabilized, we analyze the local stability of the obesity-endemic equilibrium to establish a condition for the plateau, by applying a matrix theoretic method that utilizes compound matrices. The results suggest that weight loss programs can help maintain the plateau; however, weight loss maintenance programs should be promoted to eliminate the disease.
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Flow diagram of model (2.1) for overweight and obesity dynamics.
Backward and forward bifurcation cases are plotted in (a) and (b). The obesity-free equilibrium
Time series of unhealthy and healthy weight individuals when (a)