Comparison of risk factors for placental abruption and placenta previa: Case‐cohort study

Matsuda, Yoshihisa; Hayashi, Kyozo; Shiozaki, Arihiro; Kawamichi, Yayoi; Shoji, Shuichi; Saito, Shigeru

doi:10.1111/j.1447-0756.2010.01408.x

Cited by 73 publications

(44 citation statements)

References 36 publications

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“…Moreover, APH was identified to have a significant association with PTB. This result was in agreement previous studies which revealed that APH is associated with a high risk of PTB [24,25].…”

Section: Discussionsupporting

confidence: 83%

Risk Factors for Preterm Labor among Women Attending El Shatby Maternity University Hospital, Alexandria, Egypt

Beltagy¹,

Rocca²,

TahaEL-Weshahi³

et al. 2016

Arch Nurs Pract Care

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Introduction: Despite the progress made in perinatal medicine over the past two decades, the problem of preterm labor continues to frustrate satisfactory reproductive outcomes and its prevention still awaits needed improvements. Several factors have been identified to be associated with preterm birth (PTB). Objective:To identify the possible epidemiological risk factors contributing to the occurrence of preterm birth among women attending El Shatby Maternity University Hospital.Methods: A case control study was carried out. Two hundred women who delivered preterm babies (from 22 weeks to less than 37 completed weeks of gestation) were matched for BMI with 200 women who delivered full term babies (equal to or more than 37 completed weeks of gestation). Data were collected using a face to face interview, along with a record review. The variables found to be significantly related to preterm birth by the initial univariate analysis were further analyzed using a multiple logistic regression analysis.Results: Being primigravida, with hypertensive disorders of pregnancy, antepartum hemorrhage, and previous history of preterm birth were found to be associated with a high probability of PTB (OR > 10.5). Past history of gynecological operations and history of urinary tract infection were found to be associated with a moderate probability of PTB (OR>4.5-10.5).Conclusion: Improvement of the current practice of screening for and the treatment of either gynecological or chronic medical disorders that could complicate pregnancies could decrease the risk of preterm birth.Approximately 30-35% of PTB are induced or iatrogenic because of medical or obstetric complications; 40-45% are spontaneous, and 25-30% are due to preterm (pre-labor) rupture of membranes (PPROM) [7]. Despite the progress made in perinatal medicine over the past two decades, the problem of preterm labor continues to frustrate satisfactory reproductive outcome and its prevention still awaits needed improvements [8]. Several factors have been identified to be associated with PTB. However, such an association does not establish causality. The American College of Obstetricians and Gynecologists guidelines Stated that the clinical predisposing factors of PTB were prior PTB, smoking, vaginal bleeding during pregnancy, and short cervix [9]. Additionally, many studies have shown other risk factors for PTL such as extremes of maternal age such as young or old maternal age, short inter-pregnancy intervals, low maternal bodymass index (BMI), twin pregnancy, pre-existing chronic diseases such as, hypertensive disorders of pregnancy, diabetes and infections [10]. From these findings, the question has emerged regarding what are the risk factors for PTL in Egypt. ObjectiveThe current study was conducted in order to identify possible epidemiological risk factors contributing to the occurrence of preterm

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Section: Discussionsupporting

confidence: 83%

Risk Factors for Preterm Labor among Women Attending El Shatby Maternity University Hospital, Alexandria, Egypt

Beltagy¹,

Rocca²,

TahaEL-Weshahi³

et al. 2016

Arch Nurs Pract Care

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“…Our study design, including the case-cohort study, was previously reported. 5 A case-cohort study is a variation of the case-control design in which the controls are drawn from the entire base population, regardless of their disease status. The subcohort was randomly selected from the entire base population and included both cases and non-cases.…”

Section: Data Source and Study Designmentioning

confidence: 99%

Impact of maternal age on the incidence of obstetrical complications in Japan

Matsuda

Kawamichi

Hayashi

et al. 2011

J of Obstet and Gynaecol

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“…Individual data were collected from the Japan Perinatal Registry Network database 2013, which is managed by the Japan Society of Obstetrics and Gynecology. The characteristics of this database were previously reported …”

Section: Methodsmentioning

confidence: 99%

Difference in Z scores of placental weight and fetal/placental weight ratio by mode of delivery

Matsuda¹,

Itoh

Okada

et al. 2019

J of Obstet and Gynaecol

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Aim:The difference of placental weight (PW) and fetal/placental weight ratio (F/P) Z scores by mode of delivery is unclear. To investigate such differences and the actual conditions underlying the imbalance between fetal and placental growth. Methods: The data from Japanese database 2013 were assessed. Light-for-dates (LFD, n = 12 884), appropriate-for-dates (n = 114 464) and heavy-for-dates (n = 13 164) from 140 512 placentas/infants of mothers delivered a singleton infant. Using Z scores of PW and F/P based on the standard curves of a sex-, parity-and gestational-age-specific PW and F/P, the rate of inappropriately heavy placenta according to the mode of delivery (vaginal [VD] vs cesarean [CS]) was investigated. Results: (i) The PW and F/P were heavier and bigger in VD than in CS, in each subgroup. In the LFD groups, the PW Z score in VD was higher than that in CS, whereas the F/P Z score was lower than in VD than that in CS. (ii) Data of single regression analyses between the PW Z score and F/P Z score in VD groups were different from those in CS, especially in LFD infants. (iii) In the LFD subgroups, the rates of inappropriately heavy placenta in VD (n = 7781) and CS (n = 5103) were 0.54% and 0.86%, respectively. Conclusion: Difference in the mode of delivery influenced the PW and F/P, and the rate of inappropriately heavy placenta is associated with mode of delivery among LFD infants. This methodology might give us a clue to search a useful way for identifying the high-risk groups requiring postnatal counseling.

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Comparison of risk factors for placental abruption and placenta previa: Case‐cohort study

Abstract: The case-cohort study technique elucidated the difference in the risk factors for placental abruption and placenta previa.

Cited by 73 publications

References 36 publications

Risk Factors for Preterm Labor among Women Attending El Shatby Maternity University Hospital, Alexandria, Egypt

Risk Factors for Preterm Labor among Women Attending El Shatby Maternity University Hospital, Alexandria, Egypt

Impact of maternal age on the incidence of obstetrical complications in Japan

Difference in Z scores of placental weight and fetal/placental weight ratio by mode of delivery

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