They also said a health survey of students and workers would be conducted.
A health survey will cover 5,000 nationals as of March 2009.
The researchers drew on information gathered in a national health survey of more than 43,000 people.
"I am worried about the government's health survey," he says.
The findings were based on a review of data gathered in federal health surveys from 1991 to 2001.
An estimated 3,000 adolescents under 18 begin smoking each day, public health surveys show.
Fewer than one in four children are fully immunized, according to the latest health survey.
This significant drop was revealed in the results of the city's well-regarded annual community health survey.
The findings were based on a review of state physical education requirements and a federal health survey of high school students.
Although nutrition appears to be marginal in the general population, health surveys are of varying quality.
