PubMed · 14894539
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C A GORDON. 1952. Cesarean section death.. https://doi.org/10.1016/s0002-9378(15)32823-4
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BACKGROUND: Structural equation modelling (SEM) has been increasingly used in medical statistics for solving a system of related regression equations. However, a great obstacle for its wider use has been its difficulty in handling categorical variables within the framework of generalised linear models. METHODS: A large data set with a known structure among two related outcomes and three independent variables was generated to investigate the use of Yule's transformation of odds ratio (OR) into Q-metric by (OR-1)/(OR+1) to approximate Pearson's correlation coefficients between binary variables whose covariance structure can be further analysed by SEM. Percent of correctly classified events and non-events was compared with the classification obtained by logistic regression. The performance of SEM based on Q-metric was also checked on a small (N = 100) random sample of the data generated and on a real data set. RESULTS: SEM successfully recovered the generated model structure. SEM of real data suggested a significant influence of a latent confounding variable which would have not been detectable by standard logistic regression. SEM classification performance was broadly similar to that of the logistic regression. CONCLUSION: The analysis of binary data can be greatly enhanced by Yule's transformation of odds ratios into estimated correlation matrix that can be further analysed by SEM. The interpretation of results is aided by expressing them as odds ratios which are the most frequently used measure of effect in medical statistics.
OBJECTIVE: To determine maternal and perinatal morbidity and mortality after uterine rupture in the Netherlands. STUDY DESIGN: All 100 Dutch obstetric departments were asked to participate in a prospective nationwide registration of uterine rupture between 1st April 2002 and 1st April 2003. For every case, a questionnaire about obstetrical history, current pregnancy and delivery, maternal and neonatal outcome was completed. RESULTS: Eighty-nine percent of all hospitals in the Netherlands participated. Ninety-eight uterine ruptures were registered; 95 after a previous caesarean section (CS) of which 91 occurred during a trial of labour. The fetus was extruded in the abdominal cavity completely in 18 cases and partially in 13 cases. Major complications due to uterine rupture were: perinatal death (n=11, from 94 cases with a viable fetus, 11.7%) and hysterectomy (n=4, 4.1%). CONCLUSION: These severe complications, perinatal death and hysterectomy, have to be an issue when counselling women on an elective CS and women with a history of a CS on the route of delivery.
We report a case of a vesicouterine fistula occurring after a Caesarean section. There was a noticeable delay in recognizing the fistula, which was, however, clearly visible on a vaginal ultrasound scanning. When urinary incontinence is developed after gynaecologic or obstetric surgery, a fistula must be suspected.