Cochrane · systematic review · CD012553
Ultrasound for diagnosis of birth weight discordance in twin pregnancies
Jahanfar, S, Ho, JJ, Jaafar, SH, et al. · Cochrane Database of Systematic Reviews · 2021 · Cochrane Library
Pregnancy and ChildbirthAMSTAR 2: not assessed
SoF tableOnly the outcomes this review put in its Summary of Findings table are listed (the Cochrane Handbook caps them at about seven per comparison). Its other analyses are not shown here.
Questions
8
current version
GRADE rated
8
No studies
0
Included studies
NR
No studies 0 · 0%Ungraded 0 · 0%Very low 8 · 100%Low 0 · 0%Moderate 0 · 0%High 0 · 0%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Questions and results
Ultrasound for diagnosis of birth weight discordance in twin pregnancies at 20% cut‐off
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
True positives (women with diagnosis of birth weight discordance) | no estimate extracted | 22 studies · 1462 participants | Very low Downgraded: risk of bias, inconsistency |
False negatives (women incorrectly classified as not having diagnosis of birth weight discordance) | no estimate extracted | 22 studies · 1462 participants | Very low Downgraded: risk of bias, inconsistency |
True negatives(women without diagnosis of birth weight discordance) | no estimate extracted | 22 studies · 6453 participants | Very low Downgraded: risk of bias, inconsistency |
False positives(women incorrectly classified as having diagnosis of birth weight discordance) | no estimate extracted | 22 studies · 6453 participants | Very low Downgraded: risk of bias, inconsistency |
Ultrasound for diagnosis of birth weight discordance in twin pregnancies at 25% cut‐off
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
True positives (women with diagnosis of birth weight discordance) | no estimate extracted | 18 studies · 1679 participants | Very low Downgraded: risk of bias, inconsistency |
False negatives (women incorrectly classified as not having diagnosis of birth weight discordance) | no estimate extracted | 18 studies · 1679 participants | Very low Downgraded: risk of bias, inconsistency |
True negatives(women without diagnosis of birth weight discordance) | no estimate extracted | 18 studies · 4792 participants | Very low Downgraded: risk of bias, inconsistency |
False positives(women incorrectly classified as having diagnosis of birth weight discordance) | no estimate extracted | 18 studies · 4792 participants | Very low Downgraded: risk of bias, inconsistency |