Variable Schema
- CRF abbreviation: case insensitive, no numbers (optional)
- Underscore _
- Question number (2 digits or characters, use 0 placeholder)
- Underscore _
- Sub-question number (2 digits or characters, use 0 placeholder)
- Underscore _
- Short descriptor <=10 characters, can use camel case
- Underscore _
- Optional descriptor modifiers
- Subject identifier (important if mother, child, father connected by same study ID)
- mo = mother
- fo = father
- ch = child
- pa = parent /caregiver
- Variable type
- bn = binary (0,1)
- yn = yes no
- sp= specify (free text)
- dt = date
- dttm = date and time
- Subject identifier (important if mother, child, father connected by same study ID)
- Underscore _
- Event identifier
- nA = Antenatal e.g. A, 20A, 36A : antenatal, 20 weeks antenatal, 36 weeks antenatal
- B = Birth
- nW= where n is a digit and W is weeks
- nM = where n is a digit and M is Months
- 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 label | Description | ||
---|---|---|---|
haf | Home and family questionnaire | ||
dgr | Demographics | ||
rnd | Randomisation, eligibility | ||
pd | Paediatric examination | ||
ef | Executive function battery | ||
bse | Bayley social emotional questionnaire | ||
dxa | DXA | ||
bys | Bayley III scores | ||
sdqp | Strengths and Difficulty Questionnaire, parent | ||
sdqt | Strengths and Difficulty Questionnaire, teacher | ||
brfpa | BRIEF, parent | ||
brfte | BRIEF, teacher | ||
brfp | BRIEF-P (preschool) | ||
scq | Social communication questionnaire | ||
phx | Past medical history | ||
ffq | Food frequency questionnaire | ||
ifq | Infant feeding history questionnaire | ||
cat | Cognitive adaptive test | ||
ath | Anthropometry | ||
asq | Ages and stages questionnaire | ||
trk | Tracking | ||
ech | Echocardiography | ||
grw | Growth | ||
fld | Fluids | ||
ant | Antenatal | ||
bth | Birth | ||
rsu | Resuscitation | ||
lab | Laboratory | ||
cus | Cranial ultrasound | ||
sae | Serious adverse events form | ||
neo | Neonatal outcomes | ||
bry | Beery | ||
aq | AQ (Autism questionnaire), child | ||
abc | Movement ABC-2 | ||
vis | Vision | ||
edu | Education | ||
wdr | Withdrawal | ||
pdv | Protocol deviations | ||
con | Contacts | ||
sc | Screening | ||
cs | Consent | scr | Screening |
rg | Registration | ||
dc | Discharge | ||
echo | Echocardiography |
Event label | Description |
---|---|
Bk | Booking |
W | Week |
A | Antenatal week |
B | Birth |
PN | Postnatal week |
N | Neonatal week |
P | pregnancy |
BP | before pregnancy |
bs | baseline |
M | month |
D | day |
y | year |
R | Randomisation |
Values Group | Description |
---|---|
ys / yu / no / un | yes successful / yes unsuccessful / no |
m / f / i | male / female / indeterminate (intersex) |
un | unknown |
in / ex | include / exclude |
1/0 | binary fields (1=yes) |
Values must always be in lower case.
Variable label | Decription | Group |
---|---|---|
wt | weight | anthropometry |
circ | circumference | anthropometry |
hc | head circumference | anthropometry |
hd | head | anthropometry |
ht | height | anthropometry |
lg | length | anthropometry |
muac | mid upper arm circumference | anthropometry |
sga | small for gestational age | anthropometry |
adc | abdominal circumference | anthropometry |
chc | chest circumference | anthropometry |
acr | acromioradiale | anthropometry |
tricepsf | triceps skinfold | anthropometry |
subscapsf | subscapular skinfold | anthropometry |
supiliacsf | suprailiac skinfold | anthropometry |
bp | blood pressure | cardiovascular |
dias | diastolic | cardiovascular |
htn | chronic hypertension (pregestational) | cardiovascular |
sys | systolic | cardiovascular |
age | age | demographic |
dob | date of birth | demographic |
edd | estimated date of delivery | demographic |
educat | education | demographic |
elec | elective | demographic |
emply | employment | demographic |
eth | ethnicity | demographic |
ga | gestation | demographic |
pma | postmenstrual age | demographic |
NHI | national health index | demographic |
sex | sex | demographic |
StudyID | Study number | demographic |
dis | disease | disease |
DM | diabetes melitus | disease |
infect | infection | disease |
rx | treatment | disease |
etoh | alcohol | drugs |
meds | medications | drugs |
smokg | smoking | drugs |
antibody | antibody | misc |
grp | group | misc |
med | medical | misc |
num | number | misc |
pc | percentile | misc |
prob | problem | misc |
date | date | misc |
stat | status | misc |
lt | left | misc |
rt | right | misc |
wk | week | time |
hr | hour | time |
sec | second | time |
day | day | time |
aph | antepartum haemorrhage | obstetric |
grav | gravidity | obstetric |
par | parity | obstetric |
pet | preeclampsia | obstetric |
prem | preterm | obstetric |
ptb | preterm birth | obstetric |
thrmc | threatened miscarriage | obstetric |
top | termination of pregnancy | obstetric |
infert | infertility | obstetric |
gahtn | gestational hypertension | obstetric |
hellp | HELLP syndrome | obstetric |
rom18h | ruptured membranes >18 hours | obstetric |
mgs04 | magnesium sulphate | obstetric |
acs | antenatal corticosteroids | obstetric |
acsrpt | repeat antenatal corticosteroids | obstetric |
labr | labour | obstetric |
birthmode | mode of birth | obstetric |
ga | gestational age at birth | obstetric |
pma | weeks of age post birthLMP | obstetric |