Question

In a study that began in 1950, a group of 5,000 teens in Kansas were asked about cigarette smoking. The occurrence of cases of lung cancer between 1990 and 2000 was studied in this group.

What type of study is this?

Answer 1

In January 1952, Hammond and Horn had a  prospective or a cohort study done were healthy people were recruited and followed over time to see who develops /dies of lung cancer and who doesnot.

The participants or samples in this study were asked questions such as:

1. Whether they smoked cigarettes

2. If they smoked, then how often they smoked and how many cigarettes they smoked.

3. They were asked questions on current and past smoking habits.

4. Also questions were asked on cigar or pipe smoking.

The conclusion of the study said " It was found that men with history of regular cigarette smoking had a considerable high death rate than men who never smoked". They also said in thier study that "The death rate from lung cancer was high among men with history of regular cigarette smoking than among men who never smoked regularly."