“…Lifestyle factors, such as physical activity [9][10][11][12][13][14][15][16] , watching TV 11 , eating habits 10,16 , substance abuse (e.g., alcohol and tobacco) 10,13,17 and sleep time 11 , have been associated with self-rated health among young people. However, most of this evidence has been obtained in cross-sectional studies, and they are limited in their ability to explore causal relationships between two variables.…”