miceData {icenReg}

Lung Tumor Interval Censored Data from Hoel and Walburg 1972

Description

RFM mice were sacrificed and examined for lung tumors. This resulted in current status interval censored data: if the tumor was present, this implied left censoring and if no tumor was present this implied right censoring. Mice were placed in two different groups: conventional environment or germ free environment.

Fields

l

left side of observation interval

u

right side of observation interval

grp

Group for mouse. Either ce (conventional environment) or ge (grem-free environment)

References

Hoel D. and Walburg, H.,(1972), Statistical analysis of survival experiments, The Annals of Statistics, 18, 1259-1294

Examples

data(miceData)
 
coxph_fit <- ic_sp(Surv(l, u, type = 'interval2') ~ grp, 
                    bs_samples = 50,	
                    data = miceData)
 
#In practice, more bootstrap samples should be used for inference
#Keeping it quick for CRAN testing purposes 
 
summary(coxph_fit)