A prevalence ratio greater than 1.0 indicates which of the following?

• A. Condition is more prevalent in the numerator
• B. Condition is more prevalent in the denominator
• C. No association between groups
• D. Both groups have equal prevalence

Answer: (A)

Prevalence ratio compares how common a condition is between two groups by dividing the prevalence in the numerator group by the prevalence in the denominator group. If the ratio is greater than 1, the condition is more common in the numerator group. For example, if 40% of the numerator group has the condition and 20% of the denominator group has it, the prevalence ratio is 0.40/0.20 = 2.0, showing higher prevalence in the numerator. If the ratio were less than 1, the condition would be more common in the denominator group; if it equals 1, prevalence is the same in both groups.