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Table 4 Search strategy for Web of Science

From: Screening for small for gestational age using third-trimester ultrasound markers: protocol for a systematic review and meta-analysis of screening test accuracy

Step Concept Search strategy
#1 Population = pregnant women TS=(pregnant OR pregnanc* OR gestation* OR fetal OR foetal OR fetus OR foetus OR foetuses OR fetuses) OR TI=(pregnant OR pregnanc* OR gestation* OR fetal OR foetal OR fetus OR foetus OR foetuses OR fetuses)
#2 Index test = ultrasound TS=(ultrasonograph* OR ultrasound OR “ultra sound” OR scan OR Doppler OR sonograph* OR echograph*) OR TI=(ultrasonograph* OR ultrasound OR “ultra sound” OR scan OR Doppler OR sonograph* OR echograph*)
#3 Reference test = small for gestational age measured by birth weight TS=(“small for gestational age” OR “small for age infant” OR SGA OR “birth weight” OR birth-weight OR birthweight OR “growth restriction” OR “growth retardation” OR IUGR OR ((fetal OR foetal OR fetus OR foetus OR newborn OR infant OR neonatal) NEAR/2 (weight OR size OR growth))) OR TI=(“small for gestational age” OR “small for age infant” OR SGA OR “birth weight” OR birth-weight OR birthweight OR “growth restriction” OR “growth retardation” OR IUGR OR ((fetal OR foetal OR fetus OR foetus OR newborn OR infant OR neonatal) NEAR/2 (weight OR size OR growth)))
#4 Outcome = predictive value TS=(Sensitivit* OR specificity OR “predictive value*” OR “predictive model*” OR “false-positive rate” OR “detection rate” OR “ROC curve” OR “receiver operating characteristic” OR “AUC” OR “area under the curve” OR screening)
#5 Human filter TS=(Microorganisms OR Plants OR Invertebrates OR Protochordates OR “Nonhuman Vertebrates”)
#6 Combination of concepts #1 AND #2 AND #3 AND #4 NOT #5