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Question 2#

In a Kaplan–Meier curve, which term describes removing subjects from the survival analysis who have not completed follow-up at the designated time point?

a. Missing data
b. Listwise deletion
c. Intention to treat
d. Censoring
e. Rounding

Correct Answer is D


Answer D

A Kaplan–Meier curve is a commonly used analysis to calculate survival after a treatment using lifetime data. Censoring correctly describes the process of removing subjects from a survival analysis if they have not completed follow-up at the stipulated time-point and can be incorporated in a Kaplan–Meier analysis. Intention-to-treat analysis describes an analysis methodology that, instead of removing subjects that deviate from an agreed protocol, includes them all in the final analysis based on their initial treatment intent. Listwise deletion describes removal of a record if a single data item is missing. It is a generic method for handling missing data in statistics and is not particular to Kaplan–Meier analysis. Rounding up or rounding down a figure is commonly used in mathematics to simplify interpretation.