TandmobEmer              package:mixAK              R Documentation

_S_i_g_n_a_l _T_a_n_d_m_o_b_i_e_l _d_a_t_a - _e_m_e_r_g_e_n_c_e _t_i_m_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     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'>

_U_s_a_g_e:

     data(TandmobEmer)

_F_o_r_m_a_t:

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

     _I_D_N_R identification number of a child

     _G_E_N_D_E_R character _boy_ or _girl_

     _G_E_N_D_E_R_N_u_m numeric, 0 = _boy_, 1 = _girl_

     _D_O_B character, date of birth in the format DDmmmYY

     _P_R_O_V_I_N_C_E factor, code of the province with

          _0 =  Antwerpen

          _1 =  Vlaams Brabant

          _2 =  Limburg

          _3 =  Oost Vlaanderen

          _4 =  West Vlaanderen


     _E_D_U_C factor, code of the educational system with

          _0 =  Free

          _1 =  Community school

          _2 =  Province/council school


     _S_T_A_R_T_B_R 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      


     _E_B_E_G._x_x 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).

     _E_E_N_D._x_x 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'.

     _C_E_N_S_O_R._x_x 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'.     

_S_o_u_r_c_e:

     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).

_R_e_f_e_r_e_n_c_e_s:

     Kom&#225rek, 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.

_S_e_e _A_l_s_o:

     'Tandmob'

_E_x_a_m_p_l_e_s:

     data(TandmobEmer)
     summary(TandmobEmer)

