I've recently calculated a hazard ratio doing a multi variable Cox regression analysis (Kaplan Meier) for an assignment. Part of my feedback was to adjust the hazard ratio to a 'crude ratio'.
How do I do that? I'm using SPSS 19/PASW.
Actually, it sounds like the hazard ratio you obtained was the adjusted ratio, whereas by definition the crude ratio has no adjustment for covariates.
When you did your multivariable Cox regression, you included some covariates in the model, and the crude ratio would be the hazard ratio without these covariates included in the model.
To get this, you can re-run your Cox regression without including the covariates.
I would recommend reading the following link: http://faculty.chass.ncsu.edu/garson/PA765/cox.htm