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Variable Schema

  1. CRF abbreviation: case insensitive, no numbers
  2. Question number: 2 digits (use 0 place holder for 1-9)      
  3. Underscore _      
  4. Sub-question number (2 digits or characters, use 0 placeholder)      
  5. Underscore _      
  6. Short descriptor <=10 characters, can use camel case      
  7. Underscore _      
  8. Optional descriptor modifiers 
    1. Subject identifier (important if mother, child, father connected by same study ID)      
      1. mo = mother     
      2. fo = father     
      3. ch = child
      4. pa = parent /caregiver
    2. Variable type       
      1. bn = binary (0,1) 
      2. yn = yes no
      3. sp= specify (free text) 
  9. Underscore _ 
  10. Event identifier      
    1. nA = Antenatal e.g. A, 20A, 36A : antenatal, 20 weeks antenatal, 36 weeks antenatal      
    2. B = Birth      
    3. nW= where n is a digit and W is weeks      
    4. nM = where n is a digit and M is Months      
    5. nY = where n  is a number  and Y is year 

Variables should be limited to 28 characters so that a suffix or prefix can still be added. Do not include the unit of measure in the variable name (will be specified in study procedures).

 


 

CRF labelDescription
hafHome and family questionnaire
dgrDemographics
rndRandomisation, eligibility
pdPaediatric examination
efExecutive function battery
bseBayley social emotional questionnaire
dxaDXA
bysBayley III scores
sdqpStrengths and Difficulty Questionnaire, parent
sdqtStrengths and Difficulty Questionnaire, teacher
brfpaBRIEF, parent
brfteBRIEF, teacher 
brfpBRIEF-P (preschool) 
scqSocial communication questionnaire
phxPast medical history
ffqFood frequency questionnaire
ifqInfant feeding history questionnaire
catCognitive adaptive test
athAnthropometry
asqAges and stages questionnaire
trkTracking
echEchocardiography
grwGrowth
fldFluids
antAntenatal
bthBirth
rsuResuscitation
labLaboratory
cusCranial ultrasound
saeSerious adverse events form
 neoNeonatal outcomes
 bryBeery 
 aq AQ (Autism questionnaire), child
 abcMovement ABC-2 
 visVision 
 edu education

 


 

Event labelDescription
BkBooking
WWeek
AAntenatal week
BBirth
PNPostnatal week
NNeonatal week
Ppregnancy
BPbefore pregnancy
bsbaseline
Mmonth
Dday
yyear
RRandomisation

 


 

Values GroupDescription
ys / yu / noyes successful / yes unsuccessful / no
  
  
  
  
  
  

 


 

Variable labelDecriptionGroup
wtweightanthropometry
circcircumferenceanthropometry
hchead circumferenceanthropometry
hdheadanthropometry
htheightanthropometry
lglengthanthropometry
muacmid upper arm circumferenceanthropometry
sgasmall for gestational ageanthropometry
adcabdominal circumferenceanthropometry
chcchest circumferenceanthropometry
acracromioradialeanthropometry
tricepsftriceps skinfoldanthropometry
subscapsfsubscapular skinfoldanthropometry
supiliacsfsuprailiac skinfoldanthropometry
bpblood pressurecardiovascular
diasdiastoliccardiovascular
htnhypertensioncardiovascular
syssystoliccardiovascular
ageagedemographic
dobdate of birthdemographic
eddestimated date of deliverydemographic
educateducationdemographic
elecelectivedemographic
emplyemploymentdemographic
ethethnicitydemographic
gagestationdemographic
pmapostmenstrual agedemographic
NHInational health indexdemographic
sexsexdemographic
StudyIDStudy numberdemographic
disdiseasedisease
DMdiabetes melitusdisease
infectinfectiondisease
rxtreatmentdisease
etohalcoholdrugs
medsmedicationsdrugs
smokgsmokingdrugs
antibodyantibodymisc
grpgroupmisc
medmedicalmisc
numnumbermisc
pcpercentilemisc
probproblemmisc
datedate misc 
statusstatus misc 
aphantepartum haemorrhageobstetric
gravgravidityobstetric
parparityobstetric
petpreeclampsiaobstetric
prempretermobstetric
ptbpreterm birthobstetric
thrmcthreatened miscarriageobstetric
toptermination of pregnancyobstetric
infertinfertilityobstetric
gahtngestational hypertension  obstetric
   
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