tandmob2 {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 data set was used in the analyses presented in Komarek et al. (2005), in Lesaffre, Komarek, and Declerck (2005) and in Komarek and Lesaffre (2007).
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
>
data(tandmob2)
a~data frame with 4,430 rows (38 sampled children did not come to any of the designed dental examinations) and the following variables
xx takes values 53, 63, 73, 83 (deciduous lateral canines), 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
NA
if the emergence was 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).
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 53, 63, 73, 83 (deciduous lateral incisors), 54, 64, 74, 84 (deciduous first molars), 55, 65, 75, 85 (deciduous second molars).
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).
Komárek, A., Lesaffre, E., Harkanen, T., Declerck, D., and Virtanen, J. I. (2005). A Bayesian analysis of multivariate doubly-interval-censored dental data. Biostatistics, 6, 145–155.
Komárek, A. and Lesaffre, E. (2007). Bayesian accelerated failure time model for correlated interval-censored data with a normal mixture as an error distribution. Statistica Sinica, 17, 549–569.
Lesaffre, E., Komárek, A., and Declerck, D. (2005). An overview of methods for interval-censored data with an emphasis on applications in dentistry. Statistical Methods in Medical Research, 14, 539–552.
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.