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Table 5 Second trimester TAS for VCI screening studies. Test accuracy measures

From: Velamentous cord insertion: results from a rapid review of incidence, risk factors, adverse outcomes and screening

MeasureDi Salvo et al. [63]Hasegawa et al. [69]Nomiyama et al. [66]Pretorius et al. [16]Sepulveda [67]Sepulveda et al. [68]
Sensitivity1/4 (25%)25/40 (62.5%)5/5 (100%)2/6 (33.3%)5/5 (100%)7/7 (100%)
Specificity50/50 (100%)3406/3406 (100%)580/581 (99.8%)122/122 (100%)528/528 (100%)824/825 (99.8%)
PPV1/1 (100%)25/25 (100%)5/6 (83%)2/2 (100%)5/5 (100%)7/8 (87.5%)
NPV50/53 (94.3%)3406/3421 (99.6%)580/580 (100%)122/126 (96.8%)528/528 (100%)824/824 (100%)
Accuracy51/54 (94.4%)3431/3446 (99.6%)585/586 (99.8%)124/128 (96.9%)533/533 (100%)831/832 (99.9%)
  1. TAS transabdominal sonography, VCI velamentous cord insertion, NPV negative predictive value, PPV positive predictive value