TandmobEmer: 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
Leuven Biostatistics and statistical Bioinformatics Centre (L-BioStat)
Katholieke Universiteit Leuven
Kapucijnenvoer 35
B-3000 Leuven
Belgium
<emmanuel.lesaffre@kuleuven.be>

Usage

data(TandmobEmer)

Arguments

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.

References

Komárek, A. (2009). 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(12), 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.

Examples

Run this code

data(TandmobEmer)
summary(TandmobEmer)