Night shifts worsen risk of type 2 di­a­betes

The Borneo Post - Nature and health - - Front Page -

NEW RE­SEARCH has found that women who work ro­tat­ing night shifts and have un­healthy life­style habits have a par­tic­u­larly high risk of de­vel­op­ing type 2 di­a­betes. Con­ducted by US, Chi­nese, and Aus­trian re­searchers, the new study looked at data gath­ered from two long-term US health stud­ies in nurses, the Nurses’ Health Study (NHS) and NHS II, which started in 1976 and 1989.

The re­searchers gath­ered data on 143,410 women with­out type 2 di­a­betes, car­dio­vas­cu­lar dis­ease, or can­cer, who had com­pleted med­i­cal, diet and life­style ques­tion­naires at reg­u­lar in­ter­vals dur­ing the stud­ies. Par­tic­i­pants were de­fined as hav­ing an un­healthy life­style us­ing four fac­tors: be­ing over­weight or obese (body mass in­dex of 25 or above), ever hav­ing smoked, do­ing less than 30 min­utes per day of mod­er­ate to vig­or­ous in­ten­sity ex­er­cise, and hav­ing a poor diet (low in fruit, veg, nuts and whole grains, and high in pro­cessed meat, trans fats, sugar and salt).

Ro­tat­ing night shift work was de­fined as work­ing at least three night shifts per month in ad­di­tion to day and evening shifts that month. The find­ings, pub­lished in

The BMJ, showed that over the 22 to 24 years of fol­lowup, for ev­ery five years of work­ing ro­tat­ing night shifts the par­tic­i­pants were al­most a third more likely (31 per cent) to have been di­ag­nosed with type 2 di­a­betes.

Each un­healthy life­style fac­tor in­cluded in the study was also found to more than dou­ble the risk of be­ing di­ag­nosed with type 2 di­a­betes. How­ever, the re­searchers also found that women who showed any of the four un­healthy life­style fac­tors – and also worked ro­tat­ing night shifts – had an even higher risk of de­vel­op­ing type 2 di­a­betes.

For each in­di­vid­ual un­healthy life­style fac­tor par­tici- pants had a 2.83 times higher risk of the con­di­tion, which the re­searchers say is higher than just adding the in­di­vid­ual risks as­so­ci­ated with un­healthy life­style and shift work to­gether, sug­gest­ing that some kind of in­ter­ac­tion be­tween the two risk fac­tors adds even fur­ther risk. It is al­ready well-known that fac­tors such as smok­ing, a poor diet and lit­tle ex­er­cise, and be­ing over­weight or obese can in­crease the risk of type 2 di­a­betes.

Shift work, es­pe­cially night shift work, has also been pre­vi­ously linked with a higher risk of the con­di­tion, pos­si­bly due to the dis­rup­tion in cir­ca­dian rhythms which can af­fect hor­mones. The au­thors pointed out that as an ob­ser­va­tional study, no firm con­clu­sion can be made about cause and ef­fect, and that fur­ther stud­ies are needed. How­ever, they con­cluded that, “Most cases of type 2 di­a­betes could be pre­vented by ad­her­ence to a healthy life­style, and the ben­e­fits could be larger in ro­tat­ing night shift work­ers.”

*All ma­te­ri­als are only for your in­for­ma­tion, and should not be con­strued as med­i­cal ad­vice. Where nec­es­sary, ap­pro­pri­ate pro­fes­sion­als should be con­sulted

Women who work shifts and fol­low an un­healthy life­style have an es­pe­cially high risk of type 2 di­a­betes, ac­cord­ing to new re­search.

Newspapers in English

Newspapers from Malaysia

© PressReader. All rights reserved.