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Evaluation of guidelines using data from the study
source of guidance
Criteria proposed to definitively diagnose miscarriage
Positive predictive value (%, 95% Ci)
specificity (%, 95% Ci)
Initial scan criteria:
ACR, NICE, RCOG, RANZCOG, SRU (Doubilet et al)
Presenting without an embryo or yolk sac, and mean gestational sac diameter ≥25 mm
12/12 (100, 73.5 to 100)
364/364 (100, 99.0 to 100)
ACR, NICE, RCOG, RANZCOG, SRU (Doubilet et al
)
Presenting with an embryo without heart activity, and crown‐rump length ≥7 mm
17/17 (100, 80.5 to 100)
110/110 (100, 96.7 to 100)
Prospective observational multicentre study.Preisler et all. BMJ 2015;101hh1579 | doi1 02.00;6/bmj.hh1579
Considering the timing of a repeat scan...
Out of 549 initial miscarriage diagnoses, 19 were wrong: New ultrasound scans two weeks later showed that these pregnancies were viable after all.
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