World Bulletin / News Desk
Smokers may get fewer hours of sleep and have less restful slumber than non-smokers, according to a German study that looked at more than two thousand people.
Researchers whose work appeared in the journal Addiction Biology found that of nearly 1,100 smokers surveyed, 17 percent got fewer than six hours of sleep each night and 28 percent reported "disturbed" sleep quality.
That compared with rates of seven percent and 19 percent respectively among more than 1,200 non-smokers who were also surveyed, said lead researcher Stefan Cohrs, of Charite Berlin medical school in Germany.
"This study demonstrates for the first time an elevated prevalence of sleep disturbance in smokers compared with non-smokers in a population without lifetime history of psychiatric disorders even after controlling for potentially relevant risk factors," Cohrs and his colleagues wrote.
The findings cannot prove that smoking directly impairs sleep, since smokers may have other habits that could affect their shut-eye such as staying up late to watch TV or getting little exercise, Cohrs told Reuters Health in an email.
But there is also reason to believe the stimulating effects of nicotine may be to blame.
"If you smoke and you do suffer from sleep problems, it is another good reason to quit smoking," Cohrs said.
Poor sleep quality may not only make your waking hours tougher. Some studies have also linked habitually poor sleep to health problems like obesity, diabetes and heart disease.
The study included 1,071 smokers and 1,243 non-smokers who were free of mental health disorders, since those conditions may make a person both more likely to smoke and more vulnerable to sleep problems.
The researchers used a questionnaire that gauges sleep quality. Overall, more than one-quarter of smokers had a score than landed them in the category of "disturbed" sleep, meaning they had a high probability of insomnia.
Many things can affect sleep quality, and Cohrs's team was able to account for factors such as age, weight, and alcohol abuse. Yet smoking was still linked to poorer sleep quality.
It's still possible there are other things about smokers that impair their sleep, but Cohrs said he thinks the most likely culprit is nicotine - and the prospect of better sleep could provide smokers with an additional reason to quit.
'The level of alarm is extremely high,' says WHO head, calls for an emergency meeting
One person has tested positive in Denmark for the mosquito-borne Zika virus
The world is making 20 times more plastic than we did 50 years ago with the majority being dumped in the sea.
Colombia's government has signed new legislation for the regulation and legalization of cannabis to be used for medicinal purposes.
Scientists predict Earth will become increasingly hostile for mankind as it warms, with disastrous storms, floods and droughts, and rising sea levels that will consume islands and eat away at populated coasts
Hundreds of thousands of climate activists have descended on Paris ahead of the UN Climate Conference and are preparing to defy a ban on street protests joining thousands of protestors around the world.
'This is all bad news for the planet,' head of the World Meteorological Organization says
UN agency calls for urgent climate deal as hundreds of thousands fall victims to weather disasters
Fifty grams of processed meat eaten daily increases risk of colorectal cancer by 18 percent, say experts
COP21 conference aims at securing a pact on greenhouse gases that would limit global warming to two degrees Celsius over pre-industrial times.
Earth is on track for average warming of 2.7 degrees Celsius by 2100, exceeding UN's anticipation
The London Project to Cure Blindness was established a decade ago to try to reverse vision loss in patients with age-related macular degeneration
Improvement has been seen around the globe, even in the key tropical rainforests of South America and Africa
Christiana Figueres says there is 1.2 million euros deficit to cover upcoming sessions
Some of the world's major cities, most Pacific island nations are at risk of disappearing due to rising seas
Yemen forces allied to the Houthi have launched a scud missile toward southern Saudi Arabia