Significance for non-inferiority using 2x2 data

[thomas_hiemstra]

Dear Statalist,

I have 2x2 data from a clinical trial:

Event vs no event x treatment vs control.

The hypothesis is non-inferiority with a margin of 12%.

I use
- cs event treatment, limit(90) -
to obtain the risk ratio and 90% CI. But is there any way within Stata to obtain the 1-sided alpha for non-inferiority?

Thanks for considering,

Thomas