Confidence intervals for Cox Regression parameters

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Confidence intervals for Cox Regression parameters

Ange
Hi everyone!

I´ve conducted a Cox Regression in SPSS, obtaining two  coefficients (b1 and b2) as a result. I´ve to calculate the proportion of these two coefficients with a confidence interval, i.e (b1/b2)+ or - (confidence interval).

Some papers suggest to conduct the "krinsky and robb" method, others a Montecarlo simulation. Is this possible (either krinsky or montecarlo simulation) with SPSS? How?

Thanks in advance for your help!