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Addictions to video gaming, smartphones, and Personal Computer (PCs)/tablets have become serious public health problems worldwide. We distributed a lifestyle survey to sixth-grade students (aged 11-12 years) during the 10-year period 2008-2017 and compared their responses in the first 5-year period (2008-2012) with those during the second 5-year period (2013-2017). The survey asked whether the student was (1) in a good mood upon waking, (2) the time that the student woke up, (3) the time that he/she went to bed, (4) the hours of TV watche
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