Question

5. 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 2 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 2 years after being diagnosed with a slow-progressing form of prostate cancer is .85.

) The probability of surviving 2 years 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 2 years 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 2 years 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.

6. True or False? Assume the below life table was constructed from following individuals who were diagnosed with slow-progressing form of prostate cancer and decided not to receive treatment of any form. The calculated survival probability for year 3, if the Kaplan-Meir approach is used to calculate the survival probability, is approximately 0.7438.

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

Answer 1