Unlike the one-shot case study,the internal validity of the interrupted-time-series design is threatened by mortality.

Question

Quizplus · Accepted Answer

Mortality is a threat to internal validity in interrupted time-series designs because it can lead to biased estimates of the effect of the intervention. This is because mortality can lead to attrition from the study, which can result in a biased sample that is not representative of the population of interest.

Unlike the One-Shot Case Study,the Internal Validity of the Interrupted-Time-Series