At the same time, they also showed a lower incidence of large intestinal obstruction.
Some claim the reason for this might be a lower incidence in general population in China.
Research has indicated that smokers may have a lower incidence of Alzheimer's disease.
The latter group was shown to have a lower incidence of the disease.
"We had a very low incidence of absenteeism," she said.
Asian women, for example, have a much lower incidence of the disease compared with their Western counterparts.
There is a relatively low incidence of crime in Micronesia.
Due to its low incidence, it is difficult to find a large enough number of cases to adequately study the disease.
"True, we have a very low incidence, but it's an issue in our plans," he said.
"He found that this workforce has a much lower incidence of disease than the general population."