CODEBOOK
Summary of Growth and Birth History CKiD data, November 2014                              7-29-2020
UPDATED: 28JUL2020

Start  ____Field____                      Section/
Column Len  Format       Variable         Question          Description		     Code
------ --- --------- ---------------- ------------ ------------------------------ ------------------------------
    1    6 6.0       CASEID                        CKiD ID number                 100000= 100000
                                                                                  .
                                                                                  .
                                                                                  699999= 699999

    7    4 4.0       VISIT                         Visit #                        00= 00
                                                                                  .
                                                                                  .
                                                                                  990= 990

   11    5 5.0       bw_grams                      birth weight (grams)           550g
                                                                                  .
                                                                                  .
                                                                                  6000g
                                                                                  blank= missing

   16    3 3.0       GA                            gestational age (weeks)        24weeks
                                                                                  .
                                                                                  .
                                                                                  40weeks
                                                                                  blank= missing

   19    3 3.0       LBW                           low birth weight (BW<2500 g)   1= yes
                                                                                  0= no
                                                                                  blank= missing

   22    3 3.0       premature                     premature birth (GA<36 weeks)  1= yes
                                                                                  0= no
                                                                                  blank= missing

   25    3 3.0       SGA                           small for gestational age      1= yes
                                                   (BW<10th %ile for GA)          0= no
                                                                                  blank= missing

   28    3 3.0       ICU                           intensive care unit at birth   1= yes
                                                                                  0= no
                                                                                  blank= missing

   31    6 6.1       AVHEIGHT                      Average Height (cm)            50.00cm
                                                                                  .
                                                                                  .
                                                                                  250.0cm

   37    6 6.2       HTPCTag                       Height/length percentile       00.00%
                                                   based on age & gender          .
                                                                                  .
                                                                                  99.99%

   43    6 6.2       HAZag                         Height/length adjusted z-      -9.99
                                                   score based on age & gender    .
                                                                                  .
                                                                                  9.99

   49    6 6.1       AVWEIGHT                      Average Weight (kg)            3.0kg
                                                                                  .
                                                                                  .
                                                                                  175.0kg

   55    6 6.2       WTPCTag                       Weight percentile based on     00.00%
                                                   age & gender                   .
                                                                                  .
                                                                                  99.99%

   61    6 6.2       WAZag                         Weight adjusted z-score based  -9.99
                                                   on age & gender                .
                                                                                  .
                                                                                  9.99

   67    5 5.2       BSA                           Body Surface Area              0.01m2
                                                                                  .
                                                                                  .
                                                                                  3.00m2

   72    5 5.1       BMI                           Body Mass Index                14.0
                                                                                  .
                                                                                  .
                                                                                  40.0

   77    6 6.2       BMIPCTag                      Body Mass Index percentile     00.00%
                                                   based on age & gender          .
                                                                                  .
                                                                                  99.99%

   83    6 6.2       BMIZag                        Body Mass Index z-score based  -9.99
                                                   on age & gender                .
                                                                                  .
                                                                                  9.99

   89    5 5.2       midparentht                   Mid parental height --         1.40
                                                   average of mother and father   .
                                                   height                         .
                                                                                  2.10

   94    3 3.0       TANNER                        Tanner Stage                   1= Stage 1
                                                                                  2= Stage 2
                                                                                  3= Stage 3
                                                                                  4= Stage 4
                                                                                  5= Stage 5
                                                                                  Blank= Missing

   97    6 $         VERSION                       Version number of data         P01= Version 01
                                                                                  .
                                                                                  .
                                                                                  P99= Version 99