Trial reportBMC pregnancy and childbirth2013
CORONIS - International study of caesarean section surgical techniques: the follow-up study.
Trial report in BMC pregnancy and childbirth, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- Closure versus non-closure of the peritoneum at caesarean section: short- and long-term outcomes.The Cochrane database of systematic reviews · 2014Pooled it
- A prospective comparative study of single-layer versus double-layer uterine closure techniques on cesarean scar formation.BMC pregnancy and childbirth · 2025Trial
- Caesarean section surgical techniques: 3 year follow-up of the CORONIS fractional, factorial, unmasked, randomised controlled trial.Lancet (London, England) · 2016Trial
- Uterine closure after cesarean delivery: surgical technique, biological rationale, and clinical implications.American journal of obstetrics and gynecology · 2026Review
- The Case for Standardizing Cesarean Delivery Technique: Seeing the Forest for the Trees.Obstetrics and gynecology · 2020Article
- Cesarean delivery technique among HIV positive women with sub-optimal antenatal care uptake at the Douala General Hospital, Cameroon: case series report.BMC research notes · 2017Article
- Surgical Techniques at Cesarean Delivery: A U.S. Survey.Surgery journal (New York, N.Y.) · 2016Article
- Indications for Cesarean Sections in Rural Nepal.Journal of obstetrics and gynaecology of India · 2016Article
- Safety of uneventful cesarean section in terms of hemorrhage.International journal of clinical and experimental medicine · 2015Article
- Selecting and measuring optimal outcomes for randomised controlled trials in surgery.Langenbeck's archives of surgery · 2014Review
- Incidence of incisional hernia after cesarean delivery: a register-based cohort study.PloS one · 2014Article
- Short versus Long-Term Antibiotic Prophylaxis in Cesarean Section: A Randomized Clinical Trial.Nigerian medical journal : journal of the Nigeria Medical AssociationArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
16 authors.
Funding
Abstract
backgroundThe CORONIS Trial was a 2×2×2×2×2 non-regular, fractional, factorial trial of five pairs of alternative caesarean section surgical techniques on a range of short-term outcomes, the primary outcome being a composite of maternal death or infectious morbidity. The consequences of different surgical techniques on longer term outcomes have not been well assessed in previous studies. Such outcomes include those related to subsequent pregnancy: mode of delivery; abnormal placentation (e.g. accreta); postpartum hysterectomy, as well as longer term pelvic problems: pain, urinary problems, infertility. The Coronis Follow-up Study aims to measure and compare the incidence of these outcomes between the randomised groups at around three years after women participated in the CORONIS Trial. METHODS/
designThis study will assess the following null hypotheses: In women who underwent delivery by caesarean section, no differences will be detected with respect to a range of long-term outcomes when comparing the following five pairs of alternative surgical techniques evaluated in the CORONIS Trial: 1. Blunt versus sharp abdominal entry. 2. Exteriorisation of the uterus for repair versus intra-abdominal repair. 3. Single versus double layer closure of the uterus. 4. Closure versus non-closure of the peritoneum (pelvic and parietal). 5. Chromic catgut versus Polyglactin-910 for uterine repair. The outcomes will include (1) women's health: pelvic pain; dysmenorrhoea; deep dyspareunia; urinary symptoms; laparoscopy; hysterectomy; tubal/ovarian surgery; abdominal hernias; bowel obstruction; infertility; death. (2) Outcomes of subsequent pregnancies: inter-pregnancy interval; pregnancy outcome; gestation at delivery; mode of delivery; pregnancy complications; surgery during or following delivery. DISCUSSION: The results of this follow-up study will have importance for all pregnant women and for health professionals who provide care for pregnant women. Although the results will have been collected in seven countries with limited health care resources (Argentina, Chile, Ghana, India, Kenya, Pakistan, Sudan) any differences in outcomes associated with different surgical techniques are likely to be generalisable throughout the world.
trial registrationISRCTN31089967.
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What OpenQuestion holds
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.