NAHQ CPHQ Practice Exam

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Which of the following sampling techniques involves selecting the medical record of every fifth patient undergoing cardiovascular bypass?

convenience
simple random
stratified
systematic

The correct answer is: systematic

Systematic sampling involves selecting every nth item from a list. In this case, every fifth patient undergoing cardiovascular bypass is being selected. Systematic sampling is efficient and easy to implement, making it a commonly used sampling technique in healthcare quality improvement initiatives. In contrast: - Convenience sampling does not involve a random selection process and may introduce bias. - Simple random sampling involves each item having an equal probability of being selected, which is not the case in this scenario. - Stratified sampling involves dividing the population into subgroups and then randomly selecting samples from each subgroup, which is different from the systematic approach of selecting every nth item.