Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.

Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.

Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.


Night shift may boost black women's diabetes risk

13 January 2015, 10:11

New York - Researchers have found that black women working the night shift are at higher risk of diabetes.

"In view of the high prevalence of shift work among workers in the USA - 35% among non-Hispanic blacks and 28% in non-Hispanic whites - an increased diabetes risk among this group has important public health implications," wrote the study authors from Slone Epidemiology Center at Boston University.

It's important to note, however, that the study wasn't designed to prove that working the night shift can cause diabetes, only that there is an association between the two.

The new research included more than 28 000 black women in the United States who were diabetes-free in 2005. Of those women, 37% said they had worked night shifts. Five percent said they had worked night shifts for at least 10 years, the researchers noted.

Read: Have you been diagnosed with diabetes?

Over eight years of follow-up, nearly 1 800 cases of diabetes were diagnosed among the women.

Compared to never working night shifts, the risk of diabetes was 17% higher for one to two years of night shifts. After three to nine years of night shift work, the risk of diabetes jumped to 23%. The risk was 42% higher for 10 or more years of night work, according to the study.

After adjusting for body mass index (BMI - an estimate of body fat based on height and weight) and lifestyle factors such as diet and smoking, the researchers found that black women who worked night shifts for 10 or more years still had a 23% increased risk of developing diabetes. And those who had ever worked the night shift had a 12% increased risk.

The link between night shift and diabetes was stronger in younger women than in older women. Compared to never working the night shift, working night shifts for 10 or more years increased the risk of diabetes by 39% among women younger than 50 and by 17% among those 50 and older.

Read: Type 1 diabetes can shave a decade off your life

The study was published in the journal Diabetologia.

In the United States, nearly 13% of black women have diabetes, compared with 4.5% of white women, according to the study.

The researchers said finding a higher risk of diabetes even after adjusting for lifestyle factors and weight status suggests that additional factors, such as disruption of the circadian rhythm, may play a role. Circadian rhythms are the body's natural timekeepers, signaling the need for sleep or waking at a certain time.

"Shift work is associated with disrupted circadian rhythms and reduced total duration of sleep. Similar to the effects of jet lag, which are short-term, shift workers experience fatigue, sleepiness during scheduled awake periods and poor sleep during scheduled sleep periods. These alterations in the normal sleep-wake cycle have profound effects on metabolism," the study authors wrote.

They also said these disruptions can occur even years into a shift work schedule.

The researchers said further study is needed, especially to see if there's a way to better adapt circadian rhythms to shift work. Also, they suggested considering avoiding shift work in favor of other work arrangements whenever possible.

Read more:

Why you should keep taking your diabetes medication
Poverty makes diabetes care tougher
Some blood types may raise type 2 diabetes risk

- HealthDay


Intersex explained

26 October 2016, 08:38

Read News24’s Comments Policy

Comment on this story
Comments have been closed for this article.

Read more from our Users

Nigeria @ 56: Words to my green f...

A leader’s job is not to dictate, but rather to be respected, admired and be a trustee, of the land we love, with so much potential, a land which should be freer than free. Its still a long way to fufilling our destiny! Read more...

Submitted by
Isaac Asabor263
Recession: An opportunity for Nig...

The recession should be seen as an opportunity for the country’s promotion as long as we all collectively conduct ourselves in a patriotic manner, writes Isaac Asabor.  Read more...

Submitted by
Black and White

We want to imitate the whites in everything because we are ignorant of our inherent originality and content. We spend all our Naira to acquire his inventions because we so oblivious of our natural endowments that we allow him have it for free. Read more...

Submitted by
Nate Nat
Adamawa State University Mubi: A ...

ADSU integrity forum has accused the Sunday Joshua Wugira, a lawyer, of adopting unorthodox tactics by abusing his privilege by attacking the integrity of ADSU Vice Chancellor Dr. Moses Zira Zaruwa, writes a News24 reader. Read more...

Submitted by
Abdulsalam Jubril
My Country Nigeria (Part One)

Poetry by Abdulsalam Jubril.

Submitted by
Abdulsalam Jubril
Recession, dearth in leadership a...

Every leader has the opportunity to become great and making himself immortal in the lives and hearts of people for generations to come. Will Mr. President seize this opportunity?, questions Abdulsalam Jubril. Read more...