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Perinatal epidemiology

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https://www.readbyqxmd.com/read/29351271/risk-factors-for-low-birth-weight-according-to-the-multiple-logistic-regression-model-a-retrospective-cohort-study-in-jos%C3%A3-mar%C3%A3-a-morelos-municipality-quintana-roo-mexico
#1
José Franco Monsreal, Miriam Del Ruby Tun Cobos, José Ricardo Hernández Gómez, Lidia Esther Del Socorro Serralta Peraza
INTRODUCTION: Low birth weight has been an enigma for science over time. There have been many researches on its causes and its effects. Low birth weight is an indicator that predicts the probability of a child surviving. In fact, there is an exponential relationship between weight deficit, gestational age, and perinatal mortality. Multiple logistic regression is one of the most expressive and versatile statistical instruments available for the analysis of data in both clinical and epidemiology settings, as well as in public health...
January 17, 2018: Medwave
https://www.readbyqxmd.com/read/29322220/diabetes-and-pregnancy-national-trends-over-a-15%C3%A2-year-period
#2
Sharon T Mackin, Scott M Nelson, Joannes J Kerssens, Rachael Wood, Sarah Wild, Helen M Colhoun, Graham P Leese, Sam Philip, Robert S Lindsay
AIMS/HYPOTHESIS: We aimed to examine time trends in national perinatal outcomes in pregnancies complicated by pre-existing type 1 or type 2 diabetes. METHODS: We analysed episode-level data on all obstetric inpatient delivery events (live or stillbirth) between 1 April 1998 and 31 March 2013 (n = 813,921) using the Scottish Morbidity Record (SMR02). Pregnancies to mothers with type 1 (n = 3229) and type 2 (n = 1452) diabetes were identified from the national diabetes database (Scottish Care Information-Diabetes), and perinatal outcomes were compared among women with type 1 diabetes, type 2 diabetes and those without diabetes...
January 11, 2018: Diabetologia
https://www.readbyqxmd.com/read/29317172/impact-of-positive-thyroid-autoimmunity-on-pregnant-women-with-subclinical-hypothyroidism
#3
Cristina López-Tinoco, Amparo Rodríguez-Mengual, Almudena Lara-Barea, Julia Barcala, Laura Larrán, Ana Saez-Benito, Manuel Aguilar-Diosdado
BACKGROUND: The impact of subclinical hypothyroidism (SH) and thyroid autoimmunity on obstetric and perinatal complications continues to be a matter of interest and highly controversial. AIM: To assess the impact of SH and autoimmunity in early pregnancy on the obstetric and perinatal complications in our population. MATERIAL AND METHOD: A retrospective cohort study in 435 women with SH (TSH ranging from 3.86 and 10 μIU/mL and normal FT4 values) in the first trimester of pregnancy...
January 6, 2018: Endocrinología, Diabetes y Nutrición
https://www.readbyqxmd.com/read/29301489/intrapartum-fetal-deaths-and-unexpected-neonatal-deaths-in-the-republic-of-ireland-2011-2014-a-descriptive-study
#4
K McNamara, K O'Donoghue, R A Greene
BACKGROUND: Intrapartum fetal death, the death of a fetus during labour, is a tragic outcome of pregnancy. The intrapartum death rate of a country is reflective of the care received by mothers and babies in labour and it is through analysing these cases that good aspects of care, as well as areas for improvement can be identified. Investigating unexpected neonatal deaths that may be associated with an intrapartum event is also helpful to fully appraise intrapartum care. This is a descriptive study of intrapartum fetal deaths and unexpected neonatal deaths in Ireland from 2011 to 2014...
January 4, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29283902/herpesviridae-infection-prevention-screening-and-management
#5
Akila Subramaniam, William J Britt
Bacterial, viral, and parasitic pathogens add significant morbidity and even mortality to pregnancy-with adverse effects extending to both the gravida and the newborn. Three herpesviruses deserve considerable attention given the effects of perinatal infection on obstetric outcomes, specifically maternal and neonatal morbidity. In the following review, we will provide a description of cytomegalovirus, herpes simplex virus, and varicella zoster virus. For each viral pathogen, we will describe the epidemiology, natural history, screening and diagnosis modalities, treatments, and implications for antepartum care...
March 2018: Clinical Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29273403/zika-virus-an-emerging-infectious-disease-with-serious-perinatal-and-neurologic-complications
#6
Thomas B Casale, Michael N Teng, Jamie P Morano, Thomas Unnasch, Charles J Lockwood
Zika virus (ZIKV) is a flavivirus that is primarily transmitted by Aedes aegypti, the mosquito vector also important in the transmission of the flaviviruses responsible for dengue fever, yellow fever and chikungunya. Due to occurrence in the same geographic regions, serological cross-reactivity, and similar, albeit often less severe clinical manifestations as dengue and chikungunya infections, ZIKV infection likely went undetected and/or misdiagnosed for many years. ZIKV is somewhat unique among flaviviruses in its ability to also be transmitted via sexual contact, non-sexual body fluids and perinatally...
December 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29202729/changes-in-prevalence-and-perinatal-outcomes-of-congenital-hydrocephalus-among-chinese-newborns-a-retrospective-analysis-based-on-the-hospital-based-birth-defects-surveillance-system
#7
Ling Yi, Chaomin Wan, Changfei Deng, Xiaohong Li, Kui Deng, Yi Mu, Jun Zhu, Qi Li, Yanping Wang, Li Dai
BACKGROUND: Little is known about the epidemiology of congenital hydrocephalus (CH) in China. This study aimed to depict recent changes in CH prevalence and perinatal outcomes of the affected newborns. METHODS: Data were obtained from the Chinese Birth Defects Monitoring Network (CBDMN), which collects demographic information on all newborns above 28 weeks of gestation, and clinical information on neonates with congenital anomalies. CH cases delivered during 2005-2012 were analyzed...
December 4, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29194569/cohort-studies-in-the-context-of-obstetric-and-gynecologic-research-a-methodologic-overview
#8
Carmen Messerlian, Olga Basso
Observational cohort studies represent one of the most powerful designs in epidemiology. They are also the basis of evidence in many areas of obstetric and gynecologic research, given that randomization of women, couples or pregnancies is often impossible or unethical. Indeed, well-conceived cohort studies have led to a better understanding of many important clinical and public health questions over time, including the impact of different exposures on perinatal and pediatric outcomes in pregnant women and their children...
December 1, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/29189657/perinatal-tuberculosis-is-it-a-forgotten-disease
#9
Laura Ferreras-Antolin, Pilar Caro-Aguilera, Estela Perez-Ruiz, David Moreno-Perez, Francisco Javier Perez-Frias
Perinatal tuberculosis is an uncommon condition but with a high mortality and a challenging diagnosis. We present four cases of perinatal tuberculosis managed between 1991-2014 in a Spanish Tertiary Hospital. The infection should be considered in patients with progressive respiratory symptoms and with a poor response to conventional antibiotic therapy, especially in those with positive epidemiologic risk. Bronchoscopy can be a useful tool for diagnosis.
November 20, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29176498/zika-clinical-updates-implications-for-pediatrics
#10
Kristina Adachi, Karin Nielsen-Saines
PURPOSE OF REVIEW: Zika virus (ZIKV), a mosquito-borne flavivirus, has gained recognition over the past few years as an important new cause of congenital infection. As a result, it is critical that pediatricians understand its epidemiology, clinical presentation, clinical sequelae, and management. RECENT FINDINGS: The recent ZIKV epidemiology, clinical presentation of acute infection in children and complications, perinatal infection, and congenital infection will be summarized in this ZIKV review...
November 25, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29172228/adverse-life-events-increase-risk-for-postpartum-psychiatric-episodes-a-population-based-epidemiologic-study
#11
S Meltzer-Brody, J T Larsen, L Petersen, J Guintivano, A Di Florio, W C Miller, P F Sullivan, T Munk-Olsen
BACKGROUND: Trauma histories may increase risk of perinatal psychiatric episodes. We designed an epidemiological population-based cohort study to explore if adverse childhood experiences (ACE) in girls increases risk of later postpartum psychiatric episodes. METHODS: Using Danish registers, we identified women born in Denmark between January 1980 and December 1998 (129,439 childbirths). Exposure variables were ACE between ages 0 and 15 including: (1) family disruption, (2) parental somatic illness, (3) parental labor market exclusion, (4) parental criminality, (5) parental death, (6) placement in out-of-home care, (7) parental psychopathology excluding substance use, and (8) parental substance use disorder...
November 24, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/29169712/-about-twins-epidemiological-genetic-and-obstetrical-aspects-specific-risks-and-outcome
#12
M Tauzin, A Felix, C Michot, C Dedieu, L Aoust, F Fortas, C Guillier, J Ngo, P-Y Wachter, L Petermann, E Kermorvant-Duchemin
The incidence of twin pregnancies has increased steadily for the last 40 years due to assisted reproductive technology and increased maternal childbearing age. Multiple pregnancies, especially monochorionic twin pregnancies, carry a high risk for the mother and the fetuses and require close follow-up. Twins are exposed to a higher risk of perinatal anoxia, in utero fetal demise, preterm birth, congenital malformations, fetal growth restriction, and vascular complications. Compared to singletons, twins are at higher risk of perinatal mortality and impaired neurodevelopmental outcome, justifying a thorough follow-up by pediatricians, including assessment and management of familial and psychosocial impact...
November 20, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29166302/hierarchical-semi-bayes-methods-for-misclassification-in-perinatal-epidemiology
#13
Richard F MacLehose, Lisa M Bodnar, Craig Meyer, Haitao Chu, Timothy L Lash
BACKGROUND: Validation data are used to estimate the extent of misclassification in epidemiologic studies. In the Penn MOMS cohort, prepregnancy BMI is subject to misclassification and validation data are available to estimate the extent of misclassification. We use these data to estimate the association between maternal prepregnancy body mass index and early preterm (<32 weeks) birth using a semi-Bayes hierarchical model allowing for more flexible adjustment for misclassification...
November 18, 2017: Epidemiology
https://www.readbyqxmd.com/read/29165572/principled-approaches-to-missing-data-in-epidemiologic-studies
#14
Neil J Perkins, Stephen R Cole, Ofer Harel, Eric J Tchetgen Tchetgen, BaoLuo Sun, Emily M Mitchell, Enrique F Schisterman
Principled methods to appropriately analyze missing data have long existed; however, broad implementation of these methods remains challenging. In this and companion papers, we discuss issues of missing data in the epidemiologic literature. We provide details regarding missing data mechanisms and nomenclature and motivate principled analyses through a detailed comparison of multiple imputation and inverse probability weighting. We do so in the setting of a masked data-analytic challenge with missing data induced by known mechanisms to data from the Collaborative Perinatal Project, a multisite US study conducted from 1959 to 1974...
November 20, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29165557/inverse-probability-weighted-estimation-for-monotone-and-nonmonotone-missing-data
#15
BaoLuo Sun, Neil J Perkins, Stephen R Cole, Ofer Harel, Emily Mitchell, Enrique F Schisterman, Eric J Tchetgen Tchetgen
Missing data is of common occurrence in epidemiologic research. In this paper, three data sets with induced missing values from the Collaborative Perinatal Project, a multisite United States study conducted from 1959 to 1974, are provided as examples of prototypical epidemiologic studies with missing data. Our goal is to estimate the effect of maternal smoking behavior on spontaneous abortion while adjusting for numerous confounders. At the same time, we do not necessarily wish to evaluate the joint distribution among potentially unobserved covariates, which is seldom the subject of substantive scientific interest...
November 20, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29165547/multiple-imputation-for-incomplete-data-in-epidemiologic-studies
#16
Ofer Harel, Emily M Mitchell, Neil J Perkins, Stephen R Cole, Eric J Tchetgen Tchetgen, BaoLuo Sun, Enrique F Schisterman
Epidemiologic studies are frequently susceptible to missing information. Omitting observations with missing variables remains a common strategy in epidemiologic studies, yet this simple approach can often severely bias parameter estimates of interest if the values are not missing completely at random. Even when missingness is completely random, complete case analysis can reduce efficiency of estimated parameters, because large amounts of available data are simply tossed out with the incomplete observations...
November 20, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29163023/perinatal-asphyxia-in-rat-alters-expression-of-novel-schizophrenia-risk-genes
#17
Alessandra Paparelli, Keiko Iwata, Tomoyasu Wakuda, Conrad Iyegbe, Robin M Murray, Nori Takei
Epidemiological studies suggest that obstetric complications, particularly those related to hypoxia during labor and delivery, are a risk factor for development of schizophrenia. The impact of perinatal asphyxia on postnatal life has been studied in a rodent model of global hypoxia, which is accompanied by cesarean section birth. This asphyxia model shows several behavioral, pharmacological, neurochemical, and neuroanatomical abnormalities in adulthood that have relevance to schizophrenia. Further, it is suggested that schizophrenia has a strong genetic component, and indeed novel candidate genes were recently identified by a genome-wide association study...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29155916/a-novel-strategy-to-address-unmeasured-confounding-when-comparing-opioid-agonist-therapies-in-pregnancy
#18
Lara S Lemon
Opioid addiction in pregnancy is a growing concern that has recently received a lot of attention. When comparing recommended opioid agonist therapies, many currently published studies guiding practice may be impacted by unmeasured confounding by indication. Populations of women who receive methadone are generally different from those treated with buprenorphine. Women treated with methadone frequently have more severe and uncontrolled addiction compared with buprenorphine treated patients; however, these factors are typically unmeasured or unavailable in large observational data sets...
November 16, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29127891/elevated-maternal-anxiety-in-the-nicu-predicts-worse-fine-motor-outcome-in-vlbw-infants
#19
Michelle M Greene, Beverly Rossman, Paula Meier, Kousiki Patra
AIM: The literature is sparse with respect to the impact of elevated maternal psychological distress in the neonatal intensive care unit (NICU) on later neurodevelopmental outcome in VLBW infants. The objective of this study is to examine the impact of elevated maternal distress, defined as elevated depression, anxiety and perinatal-specific post-traumatic stress, during the NICU hospitalization on VLBW infant ND outcome at 20months corrected age (CA). METHODS: This was a prospective study of 69 mothers and their VLBW infants recruited in 2011-2012...
November 8, 2017: Early Human Development
https://www.readbyqxmd.com/read/29117328/maternal-disease-with-group-b-streptococcus-and-serotype-distribution-worldwide-systematic-review-and-meta-analyses
#20
Jennifer Hall, Nadine Hack Adams, Linda Bartlett, Anna C Seale, Theresa Lamagni, Fiorella Bianchi-Jassir, Joy E Lawn, Carol J Baker, Clare Cutland, Paul T Heath, Margaret Ip, Kirsty Le Doare, Shabir A Madhi, Craig E Rubens, Samir K Saha, Stephanie Schrag, Ajoke Sobanjo-Ter Meulen, Johan Vekemans, Michael G Gravett
Background: Infections such as group B Streptococcus (GBS) are an important cause of maternal sepsis, yet limited data on epidemiology exist. This article, the third of 11, estimates the incidence of maternal GBS disease worldwide. Methods: We conducted systematic literature reviews (PubMed/Medline, Embase, Latin American and Caribbean Health Sciences Literature [LILACS], World Health Organization Library Information System [WHOLIS], and Scopus) and sought unpublished data on invasive GBS disease in women pregnant or within 42 days postpartum...
November 6, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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