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New study reveals that exposure to outdoor artificial light at night is associated with an increased risk of diabetes - Video

Published On 2022-11-16T09:00:45+05:30  |  Updated On 16 Nov 2022 4:13 PM IST
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Overview

Diabetes is a critical public health problem in China, and the onset and progression of the disease is largely governed by behavioural and environmental risk factors. The nation's rapid urbanisation and economic growth has resulted in a dramatic increase in urban lighting, and the number of people exposed to it.

A new study published in Diabetologia (the journal of the European Association for the Study of Diabetes [EASD]) finds that outdoor artificial light at night (LAN) is associated with impaired blood glucose control and an increased risk of diabetes, with more than 9 million cases of the disease in Chinese adults being attributed to light at night exposure.

The study used data from the China Noncommunicable Disease Surveillance Study. A total of 98,658 adults participated, undergoing interviews to collect demographic, medical, household income, lifestyle, education and family history information. The mean age of participants was 42.7 years and around approximately half were women.

Body weight and height of participants were measured to calculate BMI, and blood samples were taken to obtain levels of both fasting and postprandial (after meal) serum glucose, as well as glycated haemoglobin (HbA1c). This is a form of glucose bound to haemoglobin in red blood cells which acts as a moving average of blood sugar over the previous 8 to 12 weeks.

Participants at each study site were assigned an average artificial outdoor LAN exposure level for that location using night-time low-light image data of the Earth's surface from the US Defense Meteorological Satellite Program (DMSP). Exposure levels were ordered from lowest to highest and grouped into five quintiles (groups of 20% from highest to lowest), with the median light intensity in the highest quintile being 69 times greater than in the lowest.

These findings contribute to a growing body of evidence suggesting that LAN is detrimental to health and demonstrate that it may be a potential novel risk factor for diabetes. The authors conclude that "further studies involving the direct measurement of individual exposure to LAN are needed to confirm whether its relationship with diabetes is a causal one".

Reference:

Outdoor light at night in relation to glucose homoeostasis and diabetes in Chinese adults: a national and cross-sectional study of 98,658 participants from 162 study sites; Diabetologia, DOI: https://doi.org/10.1007/s00125-022-05819-x.

Speakers

Dr Rashi Prakash

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751
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