Posted on 06/05/2006 11:20:04 PM PDT by Moonman62
Young or old, man or woman, smoker or non-smoker – no matter what category you fit into, cigarette smoke can weaken your bones and increase your risk for fractures, according to new research presented this week at the IOF World Congress on Osteoporosis in Toronto. Smoking has long been known to increase the risk for osteoporosis in women, but the new studies, two conducted in Sweden and one in China, find that smoking also hastens the erosion of men's bones. In addition, the Chinese study demonstrates, for the first time, that even second-hand smoke can significantly increase the risk for osteoporosis and fractures in both men and women.
Bad News from GOOD Study
The deleterious effects of smoking can readily be detected in young bones. That's one conclusion from the Gothenburg Osteoporosis and Obesity Determinants (GOOD) study, which has been following the health of young Swedish men (see conference Abstract No. OC31).
"Though smoking has previously been linked to low bone density in the elderly population, its effects on adolescents has remained controversial. Now, we clearly demonstrate that young smokers also have significant losses in bone density," said Mattias Lorentzon, lead author on the study.
Lorentzon, working with Prof. Claes Ohlsson and colleagues at the Center for Bone Research at the Sahlgrenska Academy, Gothenburg University, measured bone mineral density--a measure of bone strength--in over 1,000 Swedish men between 18 and 20 years old. They found that in smokers, bone density in the spine, hip, and body as a whole, was lower than in their non-smoking peers. The most significant effects were in the hip, where the mineral density was over 5% lower than in non-smokers--typically, a 10% loss of bone mineral density doubles the risk of fracture.
Their results explain why previous findings have been equivocal. In this case the researchers used a sophisticated computer assisted X-ray machine (CAT scanner) to get three-dimensional images of bone. These 3D images showed that smoking primarily affects a specific type of bone called cortical bone. This very dense bone forms a layer, similar to the enamel on teeth, around softer, spongy bone. Lorentzon and colleagues found that smoking reduces the thickness of cortical bone. The findings indicate that smoking may significantly affect bone strength. "If you think of bone as a pencil, then the thicker the pencil the harder it will be to break," said Lorentzon.
Mr. OS--Sweden
In a separate study, Center for Bone Research colleagues Dan Mellström and co-workers have been measuring how a variety of lifestyle and biological factors influence the likelihood of bone fracture in elderly men (see conference Abstract No. P117). Mr. OS, as it is called, is being conducted internationally. Mellström and colleagues have recruited over 3,000 elderly men for the Swedish part of the study and correlated smoking history with bone density measurements and fracture incidence. "We find that in elderly men a history of smoking is associated with weak bones and almost a twofold increase in vertebral fracture incidence," said Mellström, who presented the data this week in Toronto. Vertebral fractures are a major sign of osteoporosis and a strong predictor of future fractures.
Mellström and colleagues took X-rays of the neck and back spine in over 1,300 men to screen for vertebral fractures--these fractures are often asymptomatic and go undetected. They found that nearly 17 percent of the men had an identifiable vertebral fracture, but when they compared fracture rate to smoking history they found that 24% of smokers had fractures compared to only 14% or those who never smoked. They also measured bone mineral density in the hip, thigh bone, and spine. Mellström reported that bone density in all regions tested was significantly lower in men who were current smokers, or who used to smoke. Overall the findings suggest that smoking reduces bone strength and dramatically increases the risk for bone fractures.
Second-Hand Smoke, First-Hand Problem
In the first ever analysis of the effects of second-hand smoke on bone density, researchers in the U.S. have found that Chinese men and pre-menopausal women have significantly lower bone density if they are exposed to second-hand smoke, even if they are themselves smokers (see conference Abstract No. P114).
Yu-Hsiang Hsu and colleagues from the Harvard School of Public Health measured hip bone mineral density in over 14,000 men and women in rural China--hip fractures are a major cause of morbidity and mortality worldwide. They also used recorded non-spine fractures and smoking history.
When they correlated smoking with osteoporosis and fracture history, they found that the largest effects were seen in pre-menopausal, non-smoking women--only 6% of women in the study were smokers, versus 87% of men. "Compared to non-smokers that are not exposed to second-hand smoke, premenopausal women exposed to second-hand smoke have a threefold higher risk of having osteoporosis and a 2.6 times greater risk for a non-spine fracture," said Hsu. Though smoking itself is a risk factor for osteoporosis, Hsu and colleagues also deduced that smokers were at increased risk if they were also exposed to smoke from other family members on a daily basis.
Though this is the first reported study of the effects of second-hand smoke on bone health, previous studies have reported that second-hand smoke may alter levels of estrogen, which is a key hormone for bone health in both women and men, Hsu explained. "Our finding is consistent with this hypothesis," said Hsu, who now plans a follow up study to correlate serum levels of cotinine, a nicotine derivative that only appears in blood of those exposed to tobacco smoke, with serum hormone levels.
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Osteoporosis, in which the bones become porous and break easily, is one of the world's most common and debilitating diseases. The result: pain, loss of movement, inability to perform daily chores, and in many cases, death. One out of three women over 50 will experience osteoporotic fractures, as will one out of five men 1, 2, 3.
Unfortunately, screening for people at risk is far from being a standard practice. Osteoporosis can, to a certain extent, be prevented, it can be easily diagnosed and effective treatments are available.
The International Osteoporosis Foundation (IOF) is the only worldwide organization dedicated to the fight against osteoporosis. It brings together scientists, physicians, patient societies and corporate partners. Working with its 172 member societies in 85 locations, and other healthcare-related organizations around the world, IOF encourages awareness and prevention, early detection and improved treatment of osteoporosis.
1 Melton U, Chrischilles EA, Cooper C et al. How many women have osteoporosis? Journal of Bone Mineral Research, 1992; 7:1005-10 2 Kanis JA et al. Long-term risk of osteoporotic fracture in Malmo. Osteoporosis International, 2000; 11:669-674 3. Melton LJ, et al. Bone density and fracture risk in men. JBMR. 1998; 13:No 12:1915
IOF World Congress on Osteoporosis, held every two years, is the only global congress dedicated specifically to all aspects of osteoporosis. Besides the opportunity to learn about the latest science and developments in diagnosis, treatment and the most recent socio-economic studies, participants have the chance to meet and exchange ideas with other physicians from around the world. All aspects of osteoporosis will be covered during the Congress which will comprise lectures by invited speakers presenting cutting edge research in the field, and 35 oral presentations and more than 680 poster presentations selected from 720 submitted abstracts. More than 70 Meet the Expert Sessions covering many practical aspects of diagnosis and management of osteoporosis are also on the program.
For more information on osteoporosis and IOF please visit: www.osteofound.org
For further information, please contact: Paul Spencer Sochaczewski, Head of Communications, International Osteoporosis Foundation: Tel. +41 22 994 0100 - Fax. +41 22 994 0101 - E-mail: IOFnews@osteofound.org or Andrew Leopold, Weber Shandwick Worldwide 400-207 Queen's Quay West, Toronto, Tel: +1 416 964 6444 E-mail: aleopold@webershandwick.com
Who knew?
Nicotine has already been known for quite awhile to hinder bone healing.
Ping!
Well, I guess when I light up I will just get me a glass of milk. Solves that problem...
Now I've read everything - Nanny State Ping
I knew someone who smoked and they lived to be 150 and never had a broken bone.
This study is flawed because any study that concludes smoking is unhealthy for smokers or nonsmokers is flawed.
You have to die from something.
I love being addicted, so what if my bones are a little fragile. I'm doing what I love.
"measured hip bone mineral density in over 14,000 men and women in rural China--"
Of course it couldn't have anything to do with the lifestyle of the poverty stricken area in which they chose to sample. Did they consider the smoke exposure from the way these folks heat their homes, or did they just decide to default to tobacco smoke?
If they outlawed exposure to smoke in that area, these folks would die from exposure to the elements. Don't worry tho, their bones would be strong enough to hold 6 feet of earth.
Then what are the plans for tomatoes and artichokes? Are the powers that be looking to ban them for consumption?
The Asian countries also seem to have a high consumption of soy products (as per a few google searches). Soy blocks calcium and causes a deficiency of vitamin D.
I would love to know how they gathered the data for this case study.
Don't forget peppers and eggplant.
Seriously, this leaves a great deal to be desired.......the press release, which is all this is, claims it looked at other things such as lifestyle and biological issues, but makes no mention of that other than that statement.
I'm in the process of attempting to download the abstract, but my system has a tendency to lock up with PDF files....but I'm trying.
I don't know. Do orthopedic surgeons refuse to do some surgeries for people who eat tomatoes or artichokes?
Stop trying to consider any logic, it has nothing to do with diet, geneology or any other factor. It is all about smoking tobacco. Heck, even chewing tobacco is good for you.
"Do orthopedic surgeons refuse to do some surgeries for people who eat tomatoes or artichokes?"
Why would any orthopedic surgeon refuse to do any surgery?
"I'm so glad I take a calcium pill every morning with my old folks silver multi-vitamin."
We should ban the sale of vitamins, that way we would see the full effect of smoking tobacco on the citizens.
Are you an A-hole to everyone? Or is it just the smokers that you wanted rounded up?
Do orthopedic surgeons refuse to do some surgeries for people who eat soybean products?
Don't touch my eggplants!
ymmm
Don't worry, CSM, the FDA is trying to do that right now, and if they can't get an outright ban they want to make them prescription only.
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