Materials and Methods
Study population
Enrollment into the cohort took place between 1990
and 2001. The target population was males and females
aged 30-69 years, randomly selected from two subdistricts.
In the present study subjects were excluded if
they were under 30 years or 70 years or above (n=944) at
the time of enrollment, they had no national identification
number (n=3,723), smoking status was unknown (n=741),
or dose of cigarettes was unknown (n=129). Of the 24,528
Materials and Methods
Study population
Enrollment into the cohort took place between 1990
and 2001. The target population was males and females
aged 30-69 years, randomly selected from two subdistricts.
In the present study subjects were excluded if
they were under 30 years or 70 years or above (n=944) at
the time of enrollment, they had no national identification
number (n=3,723), smoking status was unknown (n=741),
or dose of cigarettes was unknown (n=129). Of the 24,528
การแปล กรุณารอสักครู่..