10-year study says long work­days shown to be bad for your heart

The Hamilton Spectator - - HEALTH -

Work­ing long hours may in­crease the risk for atrial fib­ril­la­tion, or ir­reg­u­lar heart­beats that can lead to se­ri­ous car­dio­vas­cu­lar com­pli­ca­tions, a new study in The Euro­pean Heart Jour­nal found. Lengthy work hours have been shown in sev­eral pre­vi­ous stud­ies to in­crease the risk for car­dio­vas­cu­lar dis­ease. The re­searchers be­gan with 85,494 men and women from Bri­tain, Den­mark, Swe­den and Fin­land with no record of atrial fib­ril­la­tion. They as­sessed work­ing hours at the start, and then fol­lowed them for an av­er­age of 10 years, defin­ing in­ci­dents of atrial fib­ril­la­tion with med­i­cal records and death cer­tifi­cates. They ad­justed for many vari­ables — sex, so­cioe­co­nomic sta­tus, obe­sity, smok­ing, al­co­hol use, res­pi­ra­tory dis­ease, di­a­betes, high blood pres­sure, de­pres­sion and others — and found that the more hours peo­ple put in, the greater their risk. Com­pared with peo­ple who worked 35 to 40 hours a week, those who worked more than 55 hours had a 40 per cent in­creased risk of atrial fib­ril­la­tion. The study wasn’t with­out its lim­i­ta­tions, how­ever. Re­searchers as­sessed work­ing hours only once among the par­tic­i­pants, and the ex­per­i­ment did not ac­count for job type or shift work. Also, there are many other fac­tors that con­trib­ute to the risk for atrial fib­ril­la­tion. Still, the lead au­thor, Mika Kivi­maki, an epi­demi­ol­o­gist at Uni­ver­sity Col­lege Lon­don, said that “the rel­a­tive risk of AF as­so­ci­ated with long work­ing hours is of sim­i­lar size as those as­so­ci­ated with hy­per­ten­sion, di­a­betes, obe­sity and heart fail­ure.”

Newspapers in English

Newspapers from Canada

© PressReader. All rights reserved.