A prospective cohort study enrolled 100 participants with disease X to understand survival time over the course
Question:
A prospective cohort study enrolled 100 participants with disease X to understand survival time over the course of 2 years (24 months). The following table represents the data gathered from that study.
Fill in the blanks in the table for the conditional survival probabilities and the cumulative survival probabilities at times 2 and 10. Use the same format as the probabilities of events (number between 0 and 1, with 3 decimal places).
Enter the cumulative survival probability at 22 months of follow-up.
Follow-up time (months) | Event | Number of events | Number censored | N | Probability of event | Conditional probability of survival | Cumulative probability of survival |
2 | Death | 2 | 0 | 100 | 0.020 | ||
5 | Censored | 0 | 3 | 98 | |||
8 | Censored | 0 | 1 | 95 | |||
10 | Death | 1 | 0 | 94 | 0.011 | ||
11 | Censored | 0 | 4 | 93 | |||
15 | Death | 1 | 0 | 89 | 0.011 | ||
18 | Death | 3 | 0 | 88 | 0.034 | ||
19 | Death | 2 | 0 | 85 | 0.024 | ||
21 | Censored | 0 | 5 | 83 | - | - | - |
22 | Death | 1 | 0 | 78 | 0.013 |
Statistics Informed Decisions Using Data
ISBN: 9780134133539
5th Edition
Authors: Michael Sullivan III