Review the following description and decide if the study can be best categorized as case control, cohort (prospective or retrospective), cross-sectional, ecological, or experimental (RCT), and then fill in criteria for the study:

An occupational epidemiology study was done in the rubber industry to examine the effect of exposure to the fumes of a solvent and the subsequent development of lung cancer in men. Exposure to fumes was measured by a small device attached to a man's shirt collar in the morning before starting work. Men were recruited into the study and followed for the next 40 years to monitor diagnosis of lung cancer. The men had no history of any cancer or lung disease at the study's start.

Type of Study:

Perspective Cohort Study

Study Population:

Exposure:

Outcome/End Point:

Comparison: