CODEBOOK
Chronic Kidney Disease in Children (CKID) Study: DATEBASE Summary File                              7-21-2021

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

    7    4 4.0       VISIT                         Visit #                        0= enrollment                 
                                                                                  10= v1a                       
                                                                                  15= v1b                       
                                                                                  20= v2                        
                                                                                  30= v3                        
                                                                                  .                             
                                                                                  .                             
                                                                                  160= v16                      
                                                                                  x1, x6 or x8= Transitional    
                                                                                  x2 or x7= COVID/Interim PIP   
                                                                                  510 or above= PostRRT         
                                                                                  x9= Disenrollment             

   11    4 4.0       MONTH                         Month of the visit date        1= January                    
                                                                                  .                             
                                                                                  .                             
                                                                                  12= December                  
                                                                                  -9= Missing                   

   15    4 4.0       DAY                           Day of the visit date          1= 1st day of the month       
                                                                                  .                             
                                                                                  .                             
                                                                                  31= 31st day of the month     
                                                                                  -9= Missing                   

   19    6 6.0       YEAR                          Year of the visit date         2005= year 2005               
                                                                                  2025= year 2025               
                                                                                  -9= Missing                   

   25    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              

   28    9 9.3       FDATTRN                       First Transplant Date          2005.000= January 1,2005      
                                                                                  .                             
                                                                                  .                             
                                                                                  2025.000= January 1,2025      
                                                                                  2100.00= Transplant has not   
                                                                                  occurred                      

   37   10 9.3       FDATDIAL                      First Dialysis Date            2005.000= January 1,2005      
                                                                                  .                             
                                                                                  .                             
                                                                                  2025.000= January 1,2025      
                                                                                  2100.00= Dialysis has not     
                                                                                  occurred                      

   47    6 $         VERSION                       Version number of data         V01.01= Version 01,
                                                                                     in Visit 01.
                                                                                  .
                                                                                  .
                                                                                  V99.03= Version 03,
                                                                                     in Visit 99.