ears: Survival of Ventilating Tubes

In exactRankTests: Exact Distributions for Rank and Permutation Tests

Survival of Ventilating Tubes

Description

Survival times of ventilating tubes of left and right ears in 78 children with otitis media.

Usage

data(ears)

Format

A data frame with 78 observations on the following 5 variables.

left

Survival time in month of tube in left ear.

lcens

Censoring indicator for left ear: 0 censored and 1 event.

right

Survival time in month of tube in right ear.

rcens

Censoring indicator for right ear: 0 censored and 1 event.

group

a factor with levels control and treat.

Source

Sin-Ho Jung and Jong-Hyeon Jeong (2003). Rank tests for clustered survival data. Lifetime Data Analysis, 9, 21-33.

References

V.M. Howie and R.H. Schwarz (1983). Acute otitis media: One year in general pediatric practice. American Journal of Diseases in Children, 137, 155-158.

D.W. Teele, J.O. Klein, B. Rosner et al. (1989). Epidemiology of otitis media during the first seven years of life in children in greater Boston. Journal of Infectious Diseases, 160, 89-94.

Examples

data(ears)
if (require(survival, quietly=TRUE)) {
  ls <- cscores(Surv(ears$left, ears$lcens), int=TRUE)
  perm.test(ls ~ group, data=ears)
}

exactRankTests documentation built on April 26, 2022, 9:06 a.m.