A Group of 709 Patients with Lung Cancer Was Compared

Multiple Choice

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