TandmobEmer {mixAK} | R Documentation

## Signal Tandmobiel data - emergence times

### Description

This is a part of the `Tandmob` data containing only emergence times and some baseline covariates. Here, all left-censored emergence times have been changed into interval-censored with the lower limit of the intervals equal to 5 years of age (clinically minimal time before which the permanent teeth hardly emerge). Also censoring indicators are added to be able to use the data directly with the `NMixMCMC` function.

IMPORTANT NOTICE: It is possible to use these data for your research work under the condition that each manuscript is first approved by
Prof. Emmanuel Lesaffre
Biostatistical Centre Katholieke Universiteit Leuven
Kapucijnenvoer 35
B-3000 Leuven
Belgium
<`emmanuel.lesaffre@med.kuleuven.be`>

### Usage

    data(TandmobEmer)

### Format

a~data frame with 4,430 rows and the following variables

IDNR
  identification number of a child
GENDER
  character boy or girl
GENDERNum
  numeric, 0 = boy, 1 = girl
DOB
  character, date of birth in the format DDmmmYY
PROVINCE
  factor, code of the province with
  0 =
    Antwerpen
  1 =
    Vlaams Brabant
  2 =
    Limburg
  3 =
    Oost Vlaanderen
  4 =
    West Vlaanderen
EDUC
  factor, code of the educational system with
  0 =
    Free
  1 =
    Community school
  2 =
    Province/council school
STARTBR
  factor, code indicating the starting age of brushing the teeth (as reported by parents) with
  1 =
    [0, 1] years
  2 =
    (1, 2] years
  3 =
    (2, 3] years
  4 =
    (3, 4] years
  5 =
    (4, 5] years
  6 =
    later than at the age of 5
EBEG.xx
  lower limit of the emergence (in years of age) of the permanent tooth xx. It is equal to 5 if the emergence was originally left-censored.

  xx takes values 11, 21, 31, 41 (permanent incisors), 12, 22, 32, 42 (permanent central canines), 13, 23, 33, 43 (permanent lateral canines), 14, 24, 34, 44 (permanent first premolars), 15, 25, 35, 45 (permanent second premolars), 16, 26, 36, 46 (permanent first molars), 17, 27, 37, 47 (permanent second molars).

EEND.xx
  upper limit of the emergence (in years of age) of the permanent tooth xx. `NA` if the emergence was right-censored.

  xx takes values as for the variable `EBEG.xx`.

CENSOR.xx
  censoring indicator for the emergence. It is equal to 3 for interval-censored times and equal to 0 for right-censored times.

  xx takes values as for the variable `EBEG.xx`.

### Source

Biostatistical Centre, Katholieke Universiteit Leuven, Kapucijnenvoer 35, 3000 Leuven, Belgium

`URL:` `http://med.kuleuven.be/biostat/`

Data collection was supported by Unilever, Belgium. The Signal Tandmobiel project comprises the following partners: D. Declerck (Dental School, Catholic University Leuven), L. Martens (Dental School, University Ghent), J. Vanobbergen (Oral Health Promotion and Prevention, Flemish Dental Association), P. Bottenberg (Dental School, University Brussels), E. Lesaffre (Biostatistical Centre, Catholic University Leuven), K. Hoppenbrouwers (Youth Health Department, Catholic University Leuven; Flemish Association for Youth Health Care).

### References

Komárek, A. A new R package for Bayesian estimation of multivariate normal mixtures allowing for selection of the number of components and interval-censored data. Computational Statistics and Data Analysis, 53, 3932–3947.

Vanobbergen, J., Martens, L., Lesaffre, E., and Declerck, D. (2000). The Signal-Tandmobiel project – a longitudinal intervention health promotion study in Flanders (Belgium): baseline and first year results. European Journal of Paediatric Dentistry, 2, 87–96.

### See Also

`Tandmob`

### Examples

    data(TandmobEmer)
    summary(TandmobEmer)

[Package mixAK version 0.6 Index]