misssingness

[antoine4ucsd]

Hello
I am new with ciTools but very interested in using it for post hoc analyses for my survreg models
I have a very naive question:
is there a way to omit NA ?

fit<-  survreg(Surv(left, right, type="interval2") ~ drug,  dist="weibull", data=mydata)
add_quantile(mydata, fit, p = 0.75, name = c("quant", "lwr", "upr"))

error

Error in add_quantile.survreg
 Check df for missingness

thank you!