Cannabis affects sleep quality, with problems worse for those who start early, scientists claim

People who had been using since their earlier teens were twice as likely to have sleeping problems

People who used cannabis in their early teens are twice as likely to have severe sleeping problems in later life, according to a new study.

While the results suggested that marijuana use can negatively effect sleep quality in any user, it was most frequent in people who had used the drug since they were 15-years-old or younger.

The findings are likely to be most concerning for people who use marijuana to relax or as a sleeping aid, said lead author Jilesh Chheda, research assistant of the Division of Mood and Anxiety Disorders, Department of Psychiatry, at the University of Pennsylvania.

“This latest study found that current and past marijuana users are more likely to experience sleep problems,” he said.

“The most surprising finding was that there was a strong relationship with age of first use, no matter how often people were currently using marijuana.

“People who started using early were more likely to have sleep problems as an adult,” he added.

Read more: Archives show Big Tobacco had high hopes for cannabis
'Weed coffee' to go on sale in Washington – and it's definitely Legal
Cannabis given out to voters in San Jose on California primary day

The study involved adults aged between 20 and 59-years-old, who responded to the National Health and Nutrition Examination Survey – a series of studies designed to assess the health and nutritional status of adults and children in the US.

1,811 of those participants reported that they had used any drugs. To assess the results, scientists defined a ‘cannabis user’ as a person with any history of using the drug, and sleep-related problems were considered severe if they occurred at least 15 days per month. When a person first used the drug, and the number of times they had used it in the past month were also analysed.

Read more: High time to end this immoral drugs war
FBI 'weed' problem in cyber-war
'Isle of Man should consider decriminalising cannabis'

The team found that marijuana users were more likely to have difficulty sleeping, maintaining sleep, experiencing non-restorative sleep, and feeling sleepy in the daytime. People who had taken the drug before they were 15 were twice as likely to suffer these complications.

The study published in the journal ‘Sleep’ and presented at SLEEP 2014, comes after Uruguay and the US states of Washington and Colorado legalised recreational marijuana use, with the first shops opening in the latter earlier this year.

“As more people have access, it will be important to understand the implications of marijuana use on public health, as its impact on sleep in the ‘real world’ is not well known,” said senior study author, Michael Grandner, PhD, instructor in Psychiatry and member of the Center for Sleep and Circadian Neurobiology.

News
Alan Bennett has criticised the “repellent” reality shows which dominate our screens
tvBut he does like Stewart Lee
Life and Style
The Google Doodle celebrating the start of the first day of autumn, 2014.
tech
Arts and Entertainment
Sheridan Smith as Cilla Black and Ed Stoppard as her manager Brian Epstein
tvCilla Episode 2 review: Grit under the glamour in part two of biopic series starring Sheridan Smith
Sport
David Moyes and Louis van Gaal
football
PROMOTED VIDEO
News
i100
Life and Style
Vote with your wallet: the app can help shoppers feel more informed about items on sale
lifeNew app reveals political leanings of food companies
News
Former Governor of Alaska Sarah Palin, left, with her daughter, Bristol
newsShe's 'proud' of eldest daughter, who 'punched host in the face'
Sport
New Zealand fly-half Aaron Cruden pictured in The Zookeeper's Son on a late-night drinking session
rugby
Arts and Entertainment
Salmond told a Scottish television chat show in 2001that he would also sit in front of a mirror and say things like,
tvCelebrity Trekkies from Alex Salmond to Barack Obama
Life and Style
Carol O'Brien, whose son Rob suffered many years of depression
healthOne mother's story of how London charity Maytree helped her son with his depression
News
ebooksAn unforgettable anthology of contemporary reportage
Arts and Entertainment
The cover of Dark Side of the Moon
musicCan 'The Endless River' carry on the tradition? See for yourself
Life and Style
food + drink
News
Rob Merrick's Lobby Journalists were playing Ed Balls' Labour Party MPs. The match is an annual event which takes place ahead of the opening of the party conference
newsRob Merrick insistes 'Ed will be hurting much more than me'
News
A cabin crew member photographed the devastation after one flight
news
Voices
A new app has been launched that enables people to have a cuddle from a stranger
voicesMaybe the new app will make it more normal to reach out to strangers
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

Pharmaceutical Computer System Validation Specialist

£300 - £350 Per Day: Clearwater People Solutions Ltd: Pharmaceutical Computer ...

High Level Teaching Assistant (HTLA)

£70 - £90 per day: Randstad Education Birmingham: Higher Level Teaching Assist...

Teaching Assistant

£50 - £80 per day: Randstad Education Birmingham: Randstad Education is the UK...

Senior Java Developer - API's / Webservices - XML, XSLT

£400 - £450 Per Day: Clearwater People Solutions Ltd: Our client is currently ...

Day In a Page

Secret politics of the weekly shop

The politics of the weekly shop

New app reveals political leanings of food companies
Beam me up, Scottie!

Beam me up, Scottie!

Celebrity Trekkies from Alex Salmond to Barack Obama
Beware Wet Paint: The ICA's latest ambitious exhibition

Beware Wet Paint

The ICA's latest ambitious exhibition
Pink Floyd have produced some of rock's greatest ever album covers

Pink Floyd have produced some of rock's greatest ever album covers

Can 'The Endless River' carry on the tradition?
Sanctuary for the suicidal

Sanctuary for the suicidal

One mother's story of how London charity Maytree helped her son with his depression
A roller-coaster tale from the 'voice of a generation'

Not That Kind of Girl:

A roller-coaster tale from 'voice of a generation' Lena Dunham
London is not bedlam or a cradle of vice. In fact it, as much as anywhere, deserves independence

London is not bedlam or a cradle of vice

In fact it, as much as anywhere, deserves independence
Vivienne Westwood 'didn’t want' relationship with Malcolm McLaren

Vivienne Westwood 'didn’t want' relationship with McLaren

Designer 'felt pressured' into going out with Sex Pistols manager
Jourdan Dunn: Model mother

Model mother

Jordan Dunn became one of the best-paid models in the world
Apple still coolest brand – despite U2 PR disaster

Apple still the coolest brand

Despite PR disaster of free U2 album
Scottish referendum: The Yes vote was the love that dared speak its name, but it was not to be

Despite the result, this is the end of the status quo

Boyd Tonkin on the fall-out from the Scottish referendum
Manolo Blahnik: The high priest of heels talks flats, Englishness, and why he loves Mary Beard

Manolo Blahnik: Flats, Englishness, and Mary Beard

The shoe designer who has been dubbed 'the patron saint of the stiletto'
The Beatles biographer reveals exclusive original manuscripts of some of the best pop songs ever written

Scrambled eggs and LSD

Behind The Beatles' lyrics - thanks to Hunter Davis's original manuscript copies
'Normcore' fashion: Blending in is the new standing out in latest catwalk non-trend

'Normcore': Blending in is the new standing out

Just when fashion was in grave danger of running out of trends, it only went and invented the non-trend. Rebecca Gonsalves investigates
Dance’s new leading ladies fight back: How female vocalists are now writing their own hits

New leading ladies of dance fight back

How female vocalists are now writing their own hits