L'influence des habitudes de vie sur les symptômes de dépression et d'anxiété dans une cohorte d'adolescents à risque d'obésité


Mélanie Béland

Institut national de la recherche scientifique [INRS]


Domaine : santé des populations

Programme : Formation postdoctorale

Concours 2017-2018


Unité SOUTIEN du Québec (Stratégie de recherche axée sur le patient)

Obesity in children and adolescents is a major public health concern. It is associated with increased risks of developing a chronic disease, such as diabetes, but also with worse mental health. For example, as much as 30% of obese kids suffers from an episode of depression or of anxiety in their life. Mental health problems and obesity have also been linked to sedentary behaviours, which occurs when someone is awake, but not being physically active. In Canada, adolescents spend every day about 6 hours doing sedentarily activities, such as watching TV. The concept of sedentary behaviour is different from the concept of physical inactivity and can impact people in different ways; however, they are often confused. There is a clear need to better understand how sedentary behaviour evolves from childhood to adolescence, as well as understanding its relationship with mental health.

The main objective of the current project is to better understand how sedentary behaviours of youth at risk of obesity evolve from childhood to adolescence and identify profiles of people that are at risk of developing mental health problems, like depression and anxiety.

To achieve my goals, I plan to use data from a study called QUALITY (QUebec Adipose & Lifestyle InvesTigation in Youth). This study follows 630 children at risk of obesity, who have been recruited because at least one of their parents was obese. The study captured information about the children and adolescents at three different times, within the range of 8 to 17 years old. I will use the available information about sedentary behaviours and physical activity to find at-risk profiles of poor mental health.

The results of my findings will help developing and improving interventions that are designed to reduce sedentary behaviours, as well as reducing mental health issues.