(e) Give interpretations for each HR for the model fitted in (c). (f) Is the effect of age linear? Support your response empirically by fitting an appro- priate main effects model and providing the appropriate plot. 1
2. An investigator wishes to combine her prior knowledge of anemia with the first Cox model (i.e., the main effects model ) you fitted in Q1. (a) Suppose that it is known that S (14) = 0 . 95 for a subject age 30. If possible, under the assumed model, determine what S (14) would equal if that same subject was actually age 40? If not possible, state what information you are missing. (b) Suppose that it is known that S (28) = 0 . 90 for a subject age 25. If possible, under the assumed model, determine S (56) if that same subject was actually age 50. If not possible, state what information you are missing. 3. End-stage renal disease (ESRD; also referred to as ‘renal failure’) is increasing in many countries worldwide, including the United States and Canada. Due to the
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- Fall '08
- zi, LAF