Question

In: Statistics and Probability

Suppose we have 30-day follow-up data on 350 ischemic stroke patients and want to investigate whether...

Suppose we have 30-day follow-up data on 350 ischemic stroke patients and want to investigate whether the risk of recurrent stroke and/or death (RD) depends on the type of stroke. You classify patients according to initial stroke type-having a cerebral embolism (CE = 1) or not (CE = 0).

Analysis of Maximum Likelihood Estimates

                                                        Standard         Wald

Parameter             DF      Estimate      Error          Chi-Square      Pr>ChiSq

Intercept               1        -2.8034         0.5149          29.639          <0.0001

CE                          1        1.8651          0.6479          8.2874          0.0040

Odds Ratio Estimates

                    Point                      95% Wald

Effect           Estimate                Confidence Limits

CE                6.457                      1.814           22.986

a) What is the risk of RD for CE patients?

b) What is the risk of RD for non-CE patients?

c) Is the risk of RD the same for CE and non-CE patients? Estimate the relative risk of RD.

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