Women who sleep in rooms with too much light are more likely to be overweight, a new study has suggested. A team at the Institute of Cancer Research in London found women who slept in a bedroom with enough light to see across it at night had bigger waistlines than those who slept in darker rooms, SIA reports quoting the Independent.
The study, published in the American Journal of Epidemiology, asked 113,000 women to rate the amount of light in their bedrooms, ranging from light enough to read, to too dark to see your hand.
Their responses were then compared to their body mass index, waist-to-hip ratio and other measures of obesity. The team found that these measures were all higher in women who slept in lighter rooms.
These associations were still seen after adjustments were made for factors that could be associated with light exposure levels and weight in the study participants, such as physical activity, having young children and sleep duration.
The findings have been described as "intriguing" by Professor of Epidemiology Anthony Swerdlow, who said the result open up "an interesting direction" for further research.
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