Setting: Etiopathogenic factors of physical disability in obesity are numerous, underestimated and not sought in the non-geriatric population. Amongst these factors, depression may favor the development of sarcopenic obesity by reducing strength and physical performance even in the absence of overt muscle loss. Objectives and participants: To study the link between depression status and muscle functional disorders (dynapenia) in a population of adult subjects with severe and morbid obesity.
Measurements: Patients were assessed for body composition, grip strength, the Short Physical Performances Battery test (SPPB), for depression according to the Beck II score as well as for metabolic parameters through biological tests.
Results: In 373 obese subjects (mean age 44 ± 13y and BMI 43 ± 6 kg/m²), the prevalence of depression was 53% with 18% having mild depression, 18% moderate depression and 16% severe depression. Depression was significantly related to dynapenia: 62% of dynapenic (D) patients suffered from depression compared to 50% of non-dynapenic (ND) patients (p = 0.036). The Beck questionnaire score for D patients was 20 ± 13 and 15 ± 10 for ND patients (p = 0.001). The depression intensity was significantly correlated with dynapenia with D patients having a higher severe depression degree than ND patients (30% versus 11%; p < 0.0001). Fat-free to fat mass ratio was also significantly correlated with dynapenia (p = 0.01). In multivariate analysis, the presence of depression was twice as likely to be associated with dynapenia.
Conclusions: Depression is associated with a reduction of muscle function in severe obesity in relation to its severity and to changes in fat to fat-free mass, suggesting that screening and prevention of sarcopenic obesity should be considered in adult obese patients with depression.
Keywords: Obesity; depression; mobility; muscle; sarcopenia.