The effect of maternal age on fetal and neonatal mortality

A study of association between maternal tetanus toxoid immunization and neonatal mortality in the context of Bangladesh

BACKGROUND

Maternal tetanus toxoid (MTT) vaccination during pregnancy remains an important factor for reducing infant mortality globally, especially in developing nations, including Bangladesh. Despite commendable progress in reducing child mortality through widespread MTT vaccination during pregnancy, the issue still exists. This analysis explores the impact of MTT vaccination on neonatal mortality in Bangladesh and identifies associated factors.

METHODS

This research utilizes data from the 2019 Bangladesh Multiple Indicator Cluster Survey (MICS). The dataset consists of 23,402 cases; among them, 587 cases resulted in infant death. The outcome variable was infant mortality, which was binary. The independent variables identified as potential contributors to the cause of death included tetanus toxoid vaccination status, mode of delivery (cesarean section or not), and mother's education level, among others. The Poisson model was employed to analyze the data.

RESULTS

The analyses showed that the neonatal mortality rate was 2.51%. Notably, 45.90% of mothers received the MTT vaccination during pregnancy. Among them, 23.07% received a single dose, and 22.82% took adequate doses (receiving more than two doses) and adhered to WHO guidelines. The adjusted incidence rate ratio (IRR) was 1.36, which indicates that there was a 36% higher risk of neonatal mortality for those children whose mothers did not take TT (IRR = 1.36, p = 0.081). We also found that women from middle-class households (IRR = 1.58, 95% CI = 0.98, 2.54) and women with higher parity (IRR = 1.96, 95% CI = 0.95, 4.03) also had a higher risk of newborn fatalities. A comparable trend has been observed regarding the correlation between the number of tetanus doses administered and neonatal mortality, where it also emphasizes the importance of receiving adequate doses (a minimum of 2 doses of tetanus vaccine) to mitigate neonatal mortality (adjusted IRR = 0.54, 95% CI = 0.29, 1.01) in comparison to no doses received.

CONCLUSION

Administering a minimum of one maternal tetanus dose significantly lowers the risk of neonatal mortality. Other than Maternal Tetanus Toxoid vaccination, the analyses underscore various contributors to neonatal mortality, encompassing maternal healthcare, delivery procedures, socio-economic status, and education. Targeted interventions addressing these factors have the potential to efficiently decrease neonatal mortality rates and improve overall maternal and child health.

Early neonatal mortality and determinants in Ethiopia: multilevel analysis of Ethiopian demographic and health survey, 2019

INTRODUCTION

Despite remarkable achievements in improving maternal and child health, early neonatal deaths still persist, with a sluggish decline in Ethiopia. As a pressing public health issue, it requires frequent and current studies to make appropriate interventions. Therefore, by using the most recent Ethiopian Mini Demographic Health Survey Data of 2019, we aimed to assess the magnitude and factors associated with early neonatal mortality in Ethiopia.

METHODS

Secondary data analysis was conducted based on the demographic and health survey data conducted in Ethiopia in 2019. A total weighted sample of 5,753 live births was included for this study. A multilevel logistic regression model was used to identify the determinants of early neonatal mortality. The adjusted odds ratio at 95% Cl was computed to assess the strength and significance of the association between explanatory and outcome variables. Factors with a p-value of < 0.05 are declared statistically significant.

RESULTS

The prevalence of early neonatal mortality in Ethiopia was 26.5 (95% Cl; 22.5-31.08) per 1000 live births. Maternal age 20-35 (AOR, 0.38; 95% Cl, 0.38-0.69), richer wealth index (AOR, 0.47; 95% Cl, 0.23-0.96), having no antenatal care visit (AOR, 1.86; 95% Cl, 1.05-3.30), first birth order (AOR, 3.41; 95% Cl, 1.54-7.56), multiple pregnancy (AOR, 18.5; 95% Cl 8.8-38.9), presence of less than two number of under-five children (AOR, 5.83; 95% Cl, 1.71-19.79) and Somali region (AOR, 3.49; 95% Cl, 1.70-12.52) were significantly associated with early neonatal mortality.

CONCLUSION

This study showed that, in comparison to other developing nations, the nation had a higher rate of early newborn mortality. Thus, programmers and policymakers should adjust their designs and policies in accordance with the needs of newborns and children's health. The Somali region, extreme maternal age, and ANC utilization among expectant moms should all be given special consideration.

Maternal and perinatal outcomes in women ≥40 years undergoing induction of labor compared with women <35 years: Results from 4027 mothers

AIM

Cesarean section is known to be increased with advanced maternal age in women undergoing induction of labor (IOL), but there is less information regarding other possible adverse maternal and fetal outcomes.

METHODS

Retrospective cohort study of singleton, nulliparous, at-term women undergoing IOL between January 2007 and September 2020. Outcomes studied were: cesarean section, failed induction rate, fetal distress, post-partum hemorrhage, post-partum hysterectomy, and need of transfusion. Neonatal variables analyzed were: Apgar score, umbilical cord pH, need of admission to neonatal intensive care unit, and mortality.

RESULTS

A total of 4027 women met the inclusion criteria; 1968 (48.9%) of mothers were <35 years, 1283 (31.9%) were 35-39 years, 658 (16.3%) were 40-44 years, and 118 (2.9%) were ≥45 years. Results showed a significantly increased incidence of c-section in women ≥35 years, with an OR 1.79 (95% CI 1.50-2.14) for women 40-44 years and OR 3.95 (95% CI 2.66-5.98) for women ≥45 years. The main indication for cesarean delivery was failed IOL, and this risk was also significantly increased in women ≥40 years. These differences remained significant after adjustment for confounding factors. No other adverse maternal or fetal outcomes showed an association with age.

CONCLUSION

Maternal age ≥40 years was associated with an increased risk of c-section after IOL at term compared with younger women, mainly because of failed induction, but no association with other adverse maternal or neonatal outcomes were found in our population. Risks and benefits of IOL in older women should be individually evaluated and adequately discussed with mothers.

Is a higher altitude associated with shorter survival among at-risk neonates?

INTRODUCTION

We hypothesize that high altitudes could have an adverse effect on neonatal health outcomes, especially among at-risk neonates. The current study aims to assess the association between higher altitudes on survival time among at-risk neonates.

METHODS

Retrospective survival analysis. Setting: Ecuadorian neonates who died at ≤28 days of life. Patients: We analyzed the nationwide dataset of neonatal deaths from the Surveillance System of Neonatal Mortality of the Ministry of Public Health of Ecuador, registered from 126 public and private health care facilities, between January 2014 to September 2017. Main outcome measures: We retrospectively reviewed 3016 patients. We performed a survival analysis by setting the survival time in days as the primary outcome and fixed and mixed-effects Cox proportional hazards models to estimate hazard ratios (HR) for each altitude stratum of each one of the health care facilities in which those neonates were attended, adjusting by individual variables (i.e., birth weight, gestational age at birth, Apgar scale at 5 minutes, and comorbidities); and contextual variables (i.e., administrative planning areas, type of health care facility, and level of care).

RESULTS

Altitudes of health care facilities ranging from 80 to <2500 m, 2500 to <2750m, and ≥2750 m were associated respectively with 20% (95% CI: 1% to 44%), 32% (95% CI:<1% to 79%) and 37% (95% CI: 8% to 75%) increased HR; compared with altitudes at <80 m.

CONCLUSION

Higher altitudes are independently associated with shorter survival time, as measured by days among at-risk neonates. Altitude should be considered when assessing the risk of having negative health outcomes during neonatal period.

Analysis of nationwide reflection of rising cesarean section rate in neonatal outcomes of Hungary

AIM

The authors investigated the effect of rising cesarean rates on maternal and perinatal mortality and in neonatal morbidity in Hungary.

METHODS

The authors searched the validated Hungarian National Health database of neonatal discharge records for ICD-10 codes: P0590 (growth restriction); P2010 (fetal hypoxia in labor); P2090 (intrauterine hypoxia); P2200 (respiratory distress syndrome); P2390 (congenital pneumonia); P2400 (meconium aspiration); P2850 (respiratory insufficiency); P3990 (neonatal infection); P9130 (cerebral irritability) and P9141 (cerebral depression) collected between 2006 and 2015. County-specific number of deliveries, perinatal deaths, and data on the route of delivery from the national database were also collected. Controlling for regional disparities with Human Development Index was also performed. Logistic regression analysis was performed to identify determinants of early neonatal mortality.

RESULTS

While cesarean section-rate rose from 28.6% to 38.2% perinatal mortality stayed within the range between 7.8‰ and 6.1‰. Early (0-6 days) neonatal mortality (NMR) of the whole country in 2006 was 2.8‰ and showed a significant decrease over the years to reach 1.7‰ in 2015. The rate of most neonatal morbidities decreased significantly. Controlled regression analysis proved that cesarean rates negatively influenced neonatal mortality rates.

CONCLUSION

The rise of the cesarean section rate in Hungary between 2006 and 2015 was associated with a detectable reduction of perinatal mortality and morbidity; however, the proportion of improvement in neonatal morbidity is far less than the increment in cesarean rate.

Maternal and perinatal outcomes after elective induction of labor at 39 weeks in uncomplicated singleton pregnancy: a meta-analysis

OBJECTIVE

The rate of maternal and perinatal complications increases after 39 weeks' gestation in both unselected and complicated pregnancies. The aim of this study was to synthesize quantitatively the available evidence on the effect of elective induction of labor at 39 weeks on the risk of Cesarean section, and on maternal and perinatal outcomes.

METHODS

PubMed, US Registry of Clinical Trials, SCOPUS and CENTRAL databases were searched from inception to August 2018. Additionally, the references of retrieved articles were searched. Eligible studies were randomized controlled trials of singleton uncomplicated pregnancies in which participants were randomized between 39 + 0 and 39 + 6 gestational weeks to either induction of labor or expectant management. The risk of bias of individual studies was assessed using the Cochrane Risk of Bias Tool. The overall quality of evidence was assessed according to the GRADE guideline. Primary outcomes included Cesarean section, maternal death and admission to the neonatal intensive care unit (NICU). Secondary outcomes included operative delivery, Grade-3/4 perineal laceration, postpartum hemorrhage, maternal infection, hypertensive disease of pregnancy, maternal thrombotic events, length of maternal hospital stay, neonatal death, need for neonatal respiratory support, cerebral palsy, length of stay in NICU and length of neonatal hospital stay. Pooled risk ratios (RRs) were calculated using random-effects models.

RESULTS

The meta-analysis included five studies (7261 cases). Induction of labor was associated with a decreased risk for Cesarean section (moderate quality of evidence; RR 0.86 (95% CI, 0.78-0.94); I²  = 0.1%), maternal hypertension (moderate quality of evidence; RR 0.65 (95% CI, 0.57-0.75); I²  = 0%) and neonatal respiratory support (moderate quality of evidence; RR 0.73 (95% CI, 0.58-0.95); I²  = 0%). Neonates born after induction weighed, on average, 81 g (95% CI, 63-100 g) less than those born after expectant management. No significant effects were found for the other outcomes with the available data. The main limitation of our analysis was that the majority of data were derived from a single large study. A second limitation arose from the open-label design of the studies, which may theoretically have affected the readiness of the attending clinician to resort to Cesarean section.

CONCLUSIONS

Elective induction of labor in uncomplicated singleton pregnancy at 39 weeks' gestation is not associated with maternal or perinatal complications and may reduce the need for Cesarean section, risk of hypertensive disease of pregnancy and need for neonatal respiratory support. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.

Gestational age-specific risk of stillbirth during term pregnancy according to maternal age

PURPOSE

To investigate the gestational age-specific risk of stillbirth according to the maternal age group particularly regarding stillbirth risk at the end of pregnancy.

METHODS

This study was a retrospective national cohort study of all singleton term pregnancy using the Korean Vital Statistics database (n = 2,798,542). We evaluated the risk of stillbirth by gestational week in mothers aged 20-49 years according to maternal age group and neonatal birth weight.

RESULTS

The risk of stillbirth in women aged 41 years and older was significantly higher than in women aged 20-29 years between 37 and 40 weeks' gestation. The stillbirth rate per 10,000 ongoing pregnancy in women aged 37-38 years at 39 weeks' gestation (4.22, 95% confidence intervals [CI] 3.01-5.90) and that in women aged 39-40 years at 40 weeks' gestation (8.15, 95% CI 4.83-13.77) were significantly higher in comparison with in those aged 20-29 years at 39 weeks' gestation (1.95, 95% CI 1.64-2.33) and at 40 weeks' gestation (2.59, 95% CI 2.1-3,18). The risk of stillbirth showed an increasing pattern at 40 gestational weeks, in women aged 39 years and older.

CONCLUSIONS

Delivery plan need to be set up and supported to decrease rates of stillbirth at term in women aged 35 years and older with other risk factors and in women aged 37 years and older regardless of risk factors, and especially in women older than 40 years of age.

Predictive factors for intensive birth resuscitation in a developing-country: a 5-year, single-center study

Objective: To identify risk factors outlined in the International Liaison Committee on Resuscitation (ILCOR) 2010 guideline and requirement for high-intensity resuscitation.Study design: A retrospective cross-sectional study of infants born to high-risk mothers from 2011 to 2015.Results: Totally 11,446 infants were analyzed; 37% were preterm, 36% were low-birth weight infants or less. 1506 infants required respiratory support; 82 (0.7%) and 61 (0.5%) infants needed chest compression and/or epinephrine. Very-preterm infants received more intensive resuscitation than moderate preterm or term infants. Breech presentation, maternal infection and maternal diabetes were significantly associated with need for respiratory support. Fetal anomalies, breech presentation, oligohydramnios, and multiple gestation were significantly associated with need for hemodynamic support.Conclusion: Most infants defined in the ILCOR 2010 guideline required nonintensive ventilation. Very-preterm infants, fetal anomalies, and breech presentation necessitate neonatal attendance at delivery. In developing countries, maternal infection and diabetes remain high-risk criteria despite deletion from the ILCOR 2016 guideline.