R: Survival of Ventilating Tubes

ears {exactRankTests} | R Documentation

## 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)
    }

[Package exactRankTests version 0.8-29 Index]