CODEBOOK
V2018: Prospective Cohort Study of Kidney Disease in Children                              7-28-2020
L13 - Central Laboratory - Vitamin D

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

    7    3 3.0       VISIT            A.2          Visit #                        000= 000
                                                                                  .
                                                                                  .
                                                                                  990= 990

   10    8 $         VERSVD           A.3          Form version                   09/01/04= 09/01/04
                                                                                  .
                                                                                  .
                                                                                  12/31/18= 12/31/18

   18    2 2.0       VDTESTAV         B.1          Vitamin D results available    1= Yes
                                                                                  2= No, Sample Inadequate
                                                                                  3= No, Other Reason
                                                                                  -1= NA (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   20   25 $         VDRNAVAL         B.1.a        Specify reason vitamin D       Character
                                                   results not available

   45    7 7.3       VDDATESM         B.2          Date sample drawn for vitamin  0.000= 0.000 years
                                                   D in duration of year from     .
                                                   the baseline visit             .
                                                                                  50.000= 50.000 years
                                                                                  -1= NA (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   52    3 3.0       VD25OHD2         B.3.a        25-OH Vitamin D2 (ng/mL)       30= 30
                                                                                  .
                                                                                  .
                                                                                  80= 80
                                                                                  -1= NA (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   55    3 3.0       VD25OHD3         B.3.b        25-OH Vitamin D3 (ng/mL)       1= 1
                                                                                  .
                                                                                  .
                                                                                  80= 80
                                                                                  -1= NA (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   58    3 3.0       VD25OHVT         B.3.c        25-OH Vitamin Total (ng/mL)    30= 30
                                                                                  .
                                                                                  .
                                                                                  80= 80
                                                                                  -1= NA (Skipped)
                                                                                  -7= Refusal
                                                                                  -8= Don't know
                                                                                  -9 or Blank= Missing

   61    1 $         ESTAT                         Edit status A.0                D= Dirty
                                                                                  C= Clean
                                                                                  P= Pending

   62    6 $         VERSION                       Version number of data         P01= Version 01
                                                                                  .
                                                                                  .
                                                                                  P99= Version 99