Suppose you are fitting a survival model and the outcome of interest is time to the diagnosis of cancer (T). A subject entered the study at t=0 and the diagnosis of cancer did not occur by the end of the study period, what kind of event is that? It is an interval-censored observation because an event happened between time of entry and the exit. It is a right-censored observation because no event will be observed during the study period. It is a left-censored observation where the event of interest happened before the study starts. It is a right-censored observation because the event has already occurred.
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The outcome of interest is the time to the diagnosis of cancer (T). Show more…
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For selected individuals described below, discuss in detail the types of censoring that is represented by the following individuals. "Subject 1 enrolled in the study at age 45. He entered the study with the symptom already present. This subject is left censored." "The next two healthy (without the symptom present) individuals enrolled in the study at ages 30 and 42 and never showed the symptom. These cases are not censored." "The next two healthy individuals, enrolled in the study at ages 50 and 47, died from causes unrelated to the disease (the symptom was absent) at ages 61 and 65, respectively. These two cases are random right censored." "The next three individuals, enrolled in the study at ages 36, 42, and 50, moved away from the community at ages 40, 55, and 60, respectively, never having showed the symptom. These 3 cases are random censored." "The next two individuals enrolled in the study at ages 46 and 53, and died of the disease at ages 55 and 62 respectively. They are censored."
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Which of the following will affect the result of survival analysis? a) Censoring b) Right censoring c) Left censoring d) Period censoring
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