Trial reportObstetrics and gynecology2013
Impaired ultrasonographic cervical assessment after voiding: a randomized controlled trial.
Trial report in Obstetrics and gynecology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01513395 (Focal Myometrial Contractions), which is not on this map. Cited by 2 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Focal Myometrial Contractions: Impact on Cervical Assessment and Association With Voiding. A Randomized Trial
Who cites it
2 citing papers in PubMed, 1 synthesis or guideline pooled it, 8 citations in OpenAlex.
- Cervical assessment by ultrasound for preventing preterm delivery.The Cochrane database of systematic reviews · 2019Pooled it
- Intraobserver variability in fibroid size measurements: estimated effects on assessing fibroid growth.Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine · 2014Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
Abstract
objectiveTo estimate whether the timing of bladder emptying affects focal myometrial contraction development and image adequacy.
methodsWomen at 14 0/7-32 0/7 weeks of gestation undergoing a transvaginal ultrasound examination from January 1, 2012, to September 1, 2012, were eligible for this blinded randomized controlled trial. Participants were randomly assigned to undergo transvaginal imaging immediately after urination (within 5 minutes) or to defer the imaging by at least 15 minutes. The primary outcome was focal myometrial contraction development as determined by two independent blinded reviews of the images. Secondary outcomes included image adequacy and the diagnosis of placenta previa. Relative risks (RRs) and 95% confidence intervals (CIs) were calculated using repeated-measures log binomial regression.
resultsTwo hundred twenty-one women provided 335 randomized encounters for analysis. Women in the deferred scan group were 30% less likely to experience a focal myometrial contraction (28.1% compared with 40.5%, RR 0.70, 95% CI 0.52-0.93) and 41% less likely to have inadequate images (18.6% compared with 31.5%, RR 0.59, 95% CI 0.40-0.86). The two groups were equally likely to be diagnosed with placenta previa (P=.13). However, participants in the deferred scan group were 76% less likely to have images demonstrating a placenta previa and focal myometrial contraction (3.0% compared with 12.5%, RR 0.24, 95% CI 0.09-0.62) than participants in the immediate scan group. Eight women would need to defer imaging for 15 minutes from bladder voiding to prevent one focal myometrial contraction of the lower uterine segment or inadequate imaging.
conclusionsA brief interval (at least 15 minutes) between voiding and transvaginal cervical evaluation is associated with decreased risk for focal myometrial contractions and improved imaging. CLINICAL
trial registrationClinicalTrials.gov, www.clinicaltrials.gov, NCT01513395. LEVEL OF EVIDENCE: I.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.