This article is from the source 'bbc' and was first published or seen on . It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at http://www.bbc.co.uk/news/health-30744250

The article has changed 5 times. There is an RSS feed of changes available.

Version 3 Version 4
Blood test to help smokers 'find best way to quit' Blood test to help smokers 'find best way to quit'
(less than a minute later)
A blood test could help people choose a stop-smoking strategy that would give them the best chance of quitting, research in a Lancet journal suggests.A blood test could help people choose a stop-smoking strategy that would give them the best chance of quitting, research in a Lancet journal suggests.
Studies show as many as 60% of people who try to give up start smoking again in the first week.Studies show as many as 60% of people who try to give up start smoking again in the first week.
But researchers argue measuring how quickly a person breaks down nicotine could boost the chances of success.But researchers argue measuring how quickly a person breaks down nicotine could boost the chances of success.
Other experts say the cost-effectiveness of these extra tests would need to be assessed.Other experts say the cost-effectiveness of these extra tests would need to be assessed.
Patches or pillsPatches or pills
Nicotine is one of the most addictive substances in cigarettes - smokers crave more nicotine when their body's levels drop, prompting them to smoke again.Nicotine is one of the most addictive substances in cigarettes - smokers crave more nicotine when their body's levels drop, prompting them to smoke again.
But different people break down nicotine at different rates.But different people break down nicotine at different rates.
Some scientists suggest people who break it down more quickly may crave more cigarettes and in turn find it harder to quit.Some scientists suggest people who break it down more quickly may crave more cigarettes and in turn find it harder to quit.
In this study, researchers from the University of Pennsylvania in the US enlisted some 1,240 people on different smoking cessation programmes.In this study, researchers from the University of Pennsylvania in the US enlisted some 1,240 people on different smoking cessation programmes.
They checked each volunteer's blood to see if nicotine was broken down at a normal or slow rate.They checked each volunteer's blood to see if nicotine was broken down at a normal or slow rate.
Volunteers received either a nicotine patch, a drug called varenicline or treatment with a dummy pill.Volunteers received either a nicotine patch, a drug called varenicline or treatment with a dummy pill.
Varenicline is a non-nicotine based drug that is available on prescription . Doctors balance potential side-effects - including the risk of depression and suicide - against the harms of continued smoking.Varenicline is a non-nicotine based drug that is available on prescription . Doctors balance potential side-effects - including the risk of depression and suicide - against the harms of continued smoking.
Everyone in the trial had access to behavioural counselling too.Everyone in the trial had access to behavioural counselling too.
Scientists found people who broke down nicotine at a normal rate had a better chance of quitting while using varenicline than those using nicotine replacement patches.Scientists found people who broke down nicotine at a normal rate had a better chance of quitting while using varenicline than those using nicotine replacement patches.
Though volunteers who broke nicotine down more slowly had similar success rates whichever method they used, they reported more side-effects with the varenicline.Though volunteers who broke nicotine down more slowly had similar success rates whichever method they used, they reported more side-effects with the varenicline.
Prof Caryn Lerman, one of the lead researchers, said: "If these tests are used, people could have a sizeable chance of success.Prof Caryn Lerman, one of the lead researchers, said: "If these tests are used, people could have a sizeable chance of success.
Wider useWider use
"For some people, with normal metabolism of nicotine, the chance of success might be low on the patches but could double if they take the pill while for a third of the population with slower breakdown, cheaper patches might be best.""For some people, with normal metabolism of nicotine, the chance of success might be low on the patches but could double if they take the pill while for a third of the population with slower breakdown, cheaper patches might be best."
Blood tests to check for nicotine breakdown speed are currently used in research but scientists say they could be easily developed for much wider use.Blood tests to check for nicotine breakdown speed are currently used in research but scientists say they could be easily developed for much wider use.
Dr Neil Davies, of the University of Bristol, provided an independent comment: "The results are an important scientific advance.Dr Neil Davies, of the University of Bristol, provided an independent comment: "The results are an important scientific advance.
"If the findings can be replicated they could lead to changes in practice. But there are still questions that need to be answered."If the findings can be replicated they could lead to changes in practice. But there are still questions that need to be answered.
"The cost-effectiveness of these tests would need to be taken into account.""The cost-effectiveness of these tests would need to be taken into account."
Prof Robert West, from University College London, who was not involved in this paper, said: "We know that if people try to quit unaided their chance of success for a year is about 4%.Prof Robert West, from University College London, who was not involved in this paper, said: "We know that if people try to quit unaided their chance of success for a year is about 4%.
"The way to succeed is to keep trying. It is like rolling a dice. If you keep rolling it you will succeed but if you stop rolling you will fail.""The way to succeed is to keep trying. It is like rolling a dice. If you keep rolling it you will succeed but if you stop rolling you will fail."
The University of Pennsylvania research was published in the the Lancet Respiratory Medicine journal.The University of Pennsylvania research was published in the the Lancet Respiratory Medicine journal.