Hi!

Can someone tell me how to do a Weibull distribution (Survival analysis) on STATA? I want to determine the association between antibody levels and the risk of disease, Similar to what Fabbrini et al (attached). However when I try to do it, my Cases curve is a straight line (attached capture). My data is case-control where the Cases have the disease and the controls don't have the disease.

Any step-by -step suggestions, please?

Thanks