Question
You decide to conduct a study looking at whether smoking is a risk factor for age-related macular degeneration (ARMD). You identify a similar demographic group of patients with ARMD and those without ARMD and then determine their smoking history. What type of study does this scenario best describe?
| A. |
Cohort study |
| B. |
Single-masked study |
| C. |
Case-controlled study |
| D. |
Double-blind study |
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