Factors associated with short and long sleep

The Introduction

sleeping personInterestingly,  there has been some research done over the last five years or so to show that both short (< 7 hours) and long (≥ 9 hours) have been linked to increased death rates in the USA, Europe and Asia. Short sleep has also been shown to contribute to chronic diseases such as diabetes, cardiovascular disease and obesity. In a 2009 American study, short and long sleeping hours  were reported by 28.3% and 8.5% of those surveyed, respectively. Both were associated with low education levels, low income, alcohol consumption, depression and chronic diseases such as diabetes and cardiovascular disease. Short sleep was also associated with being single and long working hours whilst long sleep was also associated with low physical activity levels, pregnancy and ethnicity.

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