A group of 709 patients with lung cancer was compared to a group of 709 controls. For each patient with lung cancer, a control patient from the same hospital and the same sex and age as the lung cancer patient was selected. The two groups were compared on their smoking habits. Which of the following applies to this study?
A) Randomized Experiment
B) Prospective Study
C) Case-control Study
D) Placebo Control

Question

Quizplus · Accepted Answer

This is a case-control study because it involves comparing patients with a condition (lung cancer) to those without (controls) to examine how exposure to a risk factor (smoking habits) differs between the two groups.

A Group of 709 Patients with Lung Cancer Was Compared