JOB stress alone probably does not cause heart attacks, a new study suggests. The study found that coronary artery disease, a heart attack risk factor, was as common in patients with low levels of job stress as in patients with high levels. Patients with high or low job stress were equally likely to suffer a heart attack or die because of heart disease, reported the researchers. The scientists found that job stress was more common in patients with normal heart arteries than in those whose arteries were blocked. Job stress was more common among women than men in the study group of mostly white-collar workers. The researchers, who noted that their findings contradict previous studies, said that the lack of evidence linking heart disease and job stress should not be interpreted as proof that psychological factors have no effect on the development of heart disease.