Table 3 Search strategy for Cochrane Library

#1

Population = pregnant women

“Pregnancy”(MeSH unexploded) OR “Pregnancy Outcome”(MeSH unexploded) OR “Pregnancy, High-Risk”(Mesh) OR “Pregnancy Trimesters”(Mesh) or pregnanc*:ti,ab,kw or gestation*:ti,ab,kw or (MeSH descriptor fetus explode all trees) or fetal:ti,ab,kw or foetal:ti,ab,kw or fetus:ti,ab,kw or foetus:ti,ab,kw or foetuses:ti,ab,kw or fetuses:ti,ab,kw

#2

Index test = ultrasound

“Ultrasonography”(MeSH unexploded) OR “Ultrasonography, Prenatal”(MeSH unexploded) OR(“Ultrasonography, Doppler”(MeSH) Not “Echocardiography, Doppler”(MeSH)) OR ultrasonograph*:ti,ab,kw OR ultrasound:ti,ab,kw OR “ultra sound”: ti,ab,kw OR scan:ti,ab,kw OR Doppler:ti,ab,kw OR sonograph*:ti,ab,kw OR echograph*:ti,ab,kw

#3

Reference test = small for gestational age measured by birth weight

“Infant, low birth weight”(MeSH) OR “fetal weight”(MeSH) OR “Birth weight”(MeSH unexploded) OR “Fetal growth retardation”(MeSH) OR “small for gestational age”:ti,ab,kw OR “small for age infant”:ti,ab,kw OR SGA:ti,ab,kw OR “birth weight”:ti,ab,kw OR birth-weight:ti,ab,kw OR birthweight:ti,ab,kw OR “growth restriction”:ti,ab,kw OR “growth retardation”:ti,ab,kw OR IUGR:ti,ab,kw OR “fetal weight”:ti,ab,kw OR “foetal weight”:ti,ab,kw OR “fetus weight”:ti,ab,kw OR “foetus weight”:ti,ab,kw OR “neonatal weight”:ti,ab,kw OR “newborn weight”:ti,ab,kw OR “infant weight”:ti,ab,kw OR “fetal size”:ti,ab,kw OR “foetal size”:ti,ab,kw OR “fetus size”:ti,ab,kw OR “neonatal size”:ti,ab,kw OR “newborn size”:ti,ab,kw OR “infant size”:ti,ab,kw OR “fetal growth”:ti,ab,kw OR “foetal growth”:ti,ab,kw OR “fetus growth”:ti,ab,kw OR “foetus growth”:ti,ab,kw OR “neonatal growth”:ti,ab,kw OR “newborn growth”:ti,ab,kw OR “infant growth”:ti,ab,kw

#4

Outcome = predictive value

“Sensitivity and Specificity”(MeSH) OR “Predictive Value of Tests”(MeSH) OR Sensitivit*:ti,ab,kw OR specificity:ti,ab,kw OR “predictive value*”:ti,ab,kw OR “predictive model*”:ti,ab,kw OR “false-positive rate”:ti,ab,kw OR “detection rate”:ti,ab,kw OR “ROC curve”:ti,ab,kw OR “receiver operating characteristic”:ti,ab,kw OR “AUC”:ti,ab,kw OR “area under the curve”:ti,ab,kw OR “screening”(MeSH unexploded) OR “screening test”(MeSH) OR “Prenatal screening”(MeSH) OR “Newborn screening”(MeSH) OR screening:ti,ab,kw

#5

Human filter

“Animal”(MeSH) NOT “Human”(MeSH)

#6

Combination of concepts

#1 AND #2 AND #3 AND #4 NOT #5