What study design was used to compare affiliated and nonaffiliated PN patients?

What study design was used to compare affiliated and nonaffiliated PN patients?

• A. Case-control study.
• B. Randomized trial.
• C. Cohort study.
• D. Cross-sectional survey.

Answer: (A)

Case-control studies compare two groups defined by a characteristic or outcome and then look back to see how they differ in prior exposures or factors. Here, PN patients are split into those who are affiliated and those who are not, and the investigation examines differences in past factors between these two groups. This retrospective approach is efficient for exploring associations within a defined patient population without following people forward in time. A randomized trial wouldn’t apply because you’re not assigning affiliation randomly. A cohort study would follow PN patients over time from exposure to outcome, which is more resource-intensive and suited to forward-looking questions. A cross-sectional survey would capture affiliation and outcomes at one moment, but it wouldn’t as clearly illuminate retrospective differences between the groups.

Case-control studies compare two groups defined by a characteristic or outcome and then look back to see how they differ in prior exposures or factors. Here, PN patients are split into those who are affiliated and those who are not, and the investigation examines differences in past factors between these two groups. This retrospective approach is efficient for exploring associations within a defined patient population without following people forward in time.

A randomized trial wouldn’t apply because you’re not assigning affiliation randomly. A cohort study would follow PN patients over time from exposure to outcome, which is more resource-intensive and suited to forward-looking questions. A cross-sectional survey would capture affiliation and outcomes at one moment, but it wouldn’t as clearly illuminate retrospective differences between the groups.