Epidemiology & Prevention USMLE Step 1 Practice Question
Investigators are designing an observational study comparing fracture risk in chronic glucocorticoid users and nonusers. They are particularly concerned that age and sex differ substantially between groups and may distort the results. Which of the following study methods is most appropriate to reduce the effect of these variables before analysis?
Answer choices
- AUsing a larger alpha level
- BMatching participants on age and sexCorrect answer
- CPerforming only univariate analysis
- DIncreasing the p value threshold
- ELowering the confidence interval width
- FRestriction limiting population to one confounder level
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