tandmobRoos {bayesSurv} | R Documentation |
This is the dataset resulting from a longitudinal prospective dental study performed in Flanders (North of Belgium) in 1996 – 2001. The cohort of 4,468 randomly sampled children who attended the first year of the basic school at the beginning of the study was annualy dental examined by one of 16 trained dentists. The original dataset consists thus of at most 6 dental observations for each child.
The dataset presented here contains mainly the information on the emergence and caries times summarized in the interval-censored observations. Some baseline covariates are also included here.
For more detail on the design of the study see Vanobbergen et al. (2000).
This is the version of the dataset used first by Leroy et al. (2005)
and contains a subset of the tandmob2
. Some children
were removed to satisfy inclusion criteria given in Leroy et
al. (2005). Additionally, left-censored emergence times of the
permanent first molars are adjusted according to the eruption stage
(see Leroy et al., 2005).
This data set was then used in the analyses presented in Komarek and Lesaffre (2006, 2006b).
data(tandmobRoos)
a~data frame with 4,394 rows and the following variables
tandmob2
, the lower
emergence limit for the permanent first molars that were originally
left-censored, are adjusted according to the eruption stage (see
Leroy, 2005 for more details).
xx takes values 16, 26, 36, 46 (permanent first molars).
NA
if the emergence was right-censored.
xx takes values as for the variable EBEG.xx
.
NA
if the
caries time was left-censored.
xx takes values as for the variable EBEG.xx
.
NA
if the
caries time was right-censored.
xx takes values as for the variable EBEG.xx
.
Unfortunately, for all teeth except 16, 26, 36 and 46 almost all the caries times are right-censored. For teeth 16, 26, 36, 46, the amount of right-censoring is only about 25%.
xx takes values 16, 26, 36, 46.
These variables are almost useless for ordinary users.
xx takes values 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
xx takes values 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
xx takes values 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
xx takes values 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
xx takes values 16, 26, 36, 46 (permanent first molars).
xx takes values 16, 26, 36, 46 (permanent first molars).
xx takes values 16, 26, 36, 46 (permanent first molars).
Biostatistical Centre, Katholieke Universiteit Leuven, Kapucijnenvoer 35, 3000 Leuven, Belgium
URL:
http://med.kuleuven.be/biostat/
Komarek, A. and Lesaffre, E. (2006).
Bayesian accelerated failure time model with multivariate doubly-interval-censored data
and flexible distributional assumptions.
Submitted.
See Komarek_Lesaffre_2006.pdf
.
Komarek, A. and Lesaffre, E. (2006b).
Bayesian semiparametric accelerated failurew time model for paired
doubly-interval-censored data.
Submitted.
See Komarek_Lesaffre_2006b.pdf
.
Leroy, R., Bogaerts, K., Lesaffre, E., and Declerck, D. (2005). Effect of caries experience in primary molars on cavity formation in the adjacent permanent first molar. Caries Research, 39, 342–349.
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.