The Influence of Ethnicity in the Relationship between Sedentary Screen Time and Left Ventricular Mass: Insights from the MAG-SALVAGES

作     者：Charifa Annis Bernard Kianu Phanzu Moussa Sidibe Mustapha El Hattaoui Benzaroual Dounia Jean-Réné M’buyamba Kabangu Benjamin Longo-Mbenza 

作者机构：Unit of Cardiology CHU Mohammed VI Cady Ayyad University Marrakech Kingdom of Morocco Unit of Cardiology University Hospital of Kinshasa Kinshasa Democratic Republic of Congo Faculty of Health Sciences Walter Sisulu University Mthatha Republic of South Africa 

出 版 物：《World Journal of Cardiovascular Diseases》 (心血管病（英文）)

年 卷 期：2017年第7卷第2期

页      面：11-23页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Left Ventricular Mass Sedentary Ethnicity White Maghreb Black Sub-Saharan Africa 

摘      要：Background: The influence of race/ethnicity on the relationship between sedentary screen time and left ventricular mass has been recently suggested, but remains a subject of debate, and has never been explored in Africa. Purpose: To determine whether there is a racial/ethnic influence on the relationship between sedentary screen time and left ventricular mass in MAGhreb and Sub Saharan Africa Left-Ventricul ArGEometry Study (MAG-SALVAGES) participants. Methods: 100 blacks sub-Saharan African and 187 white Maghreb aged 18 - 55 years underwent an interview on their behavioral measures, physical activity and eating habits. Their left ventricular mass has also been measured by a resting transthoracic echography according to the American Society of Echography. Generalized linear models evaluated a test-for-trend across higher levels of sedentary screen time in progressive models with left ventricular measurements as dependent variables. The study population was stratified into quartiles of sedentary screen time (separately for whites and blacks) and examined the joint association of sedentary screen time and LVM within quartiles of physical activity. Results: Among White Maghreb, higher screen time was associated with smaller left ventricular mass (P Conclusions: Sedentary screen time is associated with smaller left ventricular mass in White Maghreb, not in black sub-Saharan African. The lack of association in blacks supports a potential qualitative difference in the cardiovascular consequences of sedentary screen based behavior.