Washington, Sep 1 : People who smoke are at a greater risk of developing Alzheimer's disease and other forms of dementia than people who have quit or have never smoked, a new study has found.

Researchers at the Erasmus Medical Center in Rotterdam, the Netherlands, have shown that smokers over the age of 55 were 50 percent more likely to develop dementia than their non-smoking counterparts.

Washington, Sept 4 : Women who have been victims of child abuse and suffer from migraine are more likely to be depressed, a new study has found.

The study revealed that childhood abuse is more common in women with migraine, who suffer depression, than in women with migraine alone.

Washington, Sept. 4 : People whose parents are Holocaust survivors with post-traumatic stress disorder (PTSD) have on average lower levels of the stress hormone cortisol than the adult offspring of parents without PTSD, according a small study.

Washington, Sept. 4 : Teenagers' likelihood of becoming established smokers, a category of smokers who smoke at least 100 cigarettes in their lifetimes, increases with the amount of smoking they see in movies, says a report.

Washington, Sept 4 : A research has suggested that arthritis of the knee may be the first sign of a type of lung cancer, which is difficult to treat, in heavy smokers.

The researchers studied the case notes of all patients suffering form rheumatic disorders.

Between 2000 and 2005, of 6500 patients, 296 (4.4 pct) were cases of monoarthritis-inflammation in just one joint-of the knee.