CODEBOOK
Chronic Kidney Disease in Children (CKID) Study: DATEBASE Summary File                              7-30-2020
UPDATED: 28JUL2020

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

    7    4 4.0       VISIT                         Visit #                        0= enrollment
                                                                                  10= v1a
                                                                                  15= v1b
                                                                                  20= v2
                                                                                  30= v3
                                                                                  .
                                                                                  .
                                                                                  90= v9
                                                                                  x1 or x6= Transitional
                                                                                  (visstatus=2)

   11    7 7.3       YEAR                          Time after baseline visit      0.000= 0.000 years
                                                   (years)                        .
                                                                                  .
                                                                                  50.000= 50.000 years
                                                                                  -1= N.A. (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   18    3 3.0       VISSTATUS                     Visit Status                   0= Regular
                                                                                  1= Irregular
                                                                                  2= Transitional
                                                                                  3= Dialysis
                                                                                  4= Transplant
                                                                                  5= Phone/In-Person (PIP)
                                                                                     Follow-up
                                                                                  6= Online Survey (ePIP)
                                                                                  9= Disenrollment

   21    6 $         VERSION                       Version number of data         P01= Version 01
                                                                                  .
                                                                                  .
                                                                                  P99= Version 99