4. Assume the below life table was constructed from following individuals who were diagnosed with a slow-progressing form of prostate cancer and decided not to receive treatment of any form. Calculate the survival probability at year 1 using the Kaplan-Meir approach and interpret the results.
Time in Years |
Number at Risk, Nt |
Number of Deaths, Dt |
Number Censored, Ct |
Survival Probability |
0 |
20 |
1 |
||
1 |
20 |
3 |
||
2 |
17 |
1 |
||
3 |
16 |
2 |
1 |
A) The probability of surviving 1 year after being diagnosed with a slow-progressing form of prostate cancer is .85.
B) The probability of surviving 1 year after being diagnosed with a slow-progressing form of prostate cancer is .85 for the individuals being followed in this study.
C) The probability of surviving 1 year after being diagnosed with a slow-progressing form of prostate cancer is .85 for individuals who decided against all forms of treatment.
D) The probability of surviving 1 year after being diagnosed with a slow-progressing form of prostate cancer is .85 for the individuals being followed in this study and for individuals who decided against all forms of treatment.
Solution:
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