Hypoxic ischemic encephalopathy in offspring of immigrant women in Sweden: A population-based cohort study

Erratum: Increased number of live births by migrant mothers shows areal inequality in Japan: A descriptive study

[This corrects the article DOI: 10.1016/j.ssmph.2023.101531.][This corrects the article DOI: 10.1016/j.ssmph.2023.101447.].

Identifying Newborns with Hypoxic-Ischemic Encephalopathy in Hospital Discharge Data: A Validation Study

Hospital discharge databases (HDDs) are increasingly used for research on health of newborns. Linkage between a French population-based cohort of newborns with hypoxic-ischemic encephalopathy (HIE) and national HDD showed that the HIE ICD-10 code was not accurately reported. Our results suggest that HDD should not be used for research on neonatal HIE without prior validation of HIE ICD-10 codes.

Hypoxic-ischaemic encephalopathy based on clinical signs and symptoms and associated factors among neonates, Southern Ethiopian public hospitals: a case-control study

Background

Hypoxic-ischaemic encephalopathy (HIE) is a severe condition that results from reduced oxygen supply and blood flow to the brain, leading to brain injury and potential long-term neurodevelopmental impairments. This study aimed to identify the maternal and neonatal factors associated with hypoxic-ischaemic encephalopathy among Neonates.

Methods

The authors conducted a case-control study in 15 public hospitals with 515 neonates and mothers (175 cases and 340 controls). The authors used a questionnaire and clinical records created and managed by Kobo software to collect data. The authors diagnosed hypoxic-ischaemic encephalopathy (HIE) by clinical signs and symptoms. The authors used logistic regression to identify HIE factors.

Results

Hypoxic-ischaemic encephalopathy (HIE) was associated with maternal education, ultrasound checkup, gestational age, delivery mode, and labour duration. Illiterate mothers [adjusted odds ratio (AOR)= 1.913, 95% CI: 1.177, 3.109], no ultrasound checkup (AOR= 1.859, 95% CI: 1.073, 3.221), preterm (AOR= 4.467, 95% CI: 1.993, 10.012) or post-term birth (AOR= 2.903, 95% CI: 1.325, 2.903), caesarean section (AOR= 7.569, 95% CI: 4.169, 13.741), and prolonged labour (AOR= 3.591, 95% CI: 2.067, 6.238) increased the incidence of HIE.

Conclusion

This study reveals the factors for hypoxic-ischaemic encephalopathy among neonates in Ethiopia. The authors found that neonates born to illiterate women, those who experienced prolonged labour, those whose mothers did not have ultrasound checkups during pregnancy, those delivered by caesarean section, and those born preterm, or post-term were more likely to develop hypoxic-ischaemic encephalopathy. These findings indicate that enhancing maternal education and healthcare services during pregnancy and delivery may positively reduce hypoxic-ischaemic encephalopathy among neonates.

Growth and developmental outcomes of infants with hypoxic ischemic encephalopathy

Despite advances in obstetric care, hypoxic ischemic encephalopathy (HIE) remains a significant disease burden. We determined the national trends of HIE prevalence, therapeutic hypothermia (TH) use, mortality, and outcomes from 2012 to 2019. This study included term infants diagnosed with HIE between 2012 and 2019 from the National Health Insurance Service database. The prevalence of HIE was 2.4 per 1000 births without significant change during the period. TH was performed in approximately 6.7% of infants with HIE, and the annual variation ranged from 2.4 to 12.5%. The mortality among all term infants with HIE was 4.6%. The mortality rate among infants with HIE and TH significantly declined from 40 to 16.9% during the eight years. Infants with TH had higher mortality, increased use of inhaled nitric oxide, and more invasive ventilator use, indicating greater disease severity in the TH group. Infants with TH also showed significantly poorer outcomes, including delayed development, cerebral palsy, sensorineural hearing loss, and seizure, compared to infants without TH (p < 0.0001). With the increasing application of TH, mortality and developmental outcomes among infants with HIE have been improving in the past eight years in Korea. Further efforts to improve outcomes should be needed.

The Placenta and Neonatal Encephalopathy with a Focus on Hypoxic-Ischemic Encephalopathy

Background: Placental examination is important for its diagnostic immediacy to correlate with maternal and/or fetal complications and parturitional difficulties. In a broader context, clinicopathologic studies of the placenta have addressed a range of pathogenetic questions that have led to conclusive and inconclusive results and interpretations. Methods: Recent standardized morphologic criteria and terminology of placental lesions have facilitated the ability to compare findings from studies that have focused on complications and outcomes of pregnancy. This review is an evaluation of recent studies on placental lesions associated with hypoxic-ischemic encephalopathy (HIE). Conclusion: No apparent consensus exists on whether it is fetal inflammation with the release of cytokines or chronic maternal and/or fetal vascular malperfusion is responsible for HIE with a lowering of the threshold for hypoxic ischemia. The counter argument is that HIE occurs solely as an intrapartum event. Additional investigation is necessary.

Increased number of live births by migrant mothers shows areal inequality in Japan: A descriptive study

Japan has not implemented policy of accepting many migrants, and the proportion of migrants in the total population is much smaller than that in other economically developed countries. Therefore, issues regarding the health status of migrants, especially migrant mothers and their children, have not been discussed enthusiastically in Japan. In the present study, we aimed to describe the epidemiology (time trend of the number, areal distribution, and frequency of maternal nationality of newborn births) of live births by migrant mothers in Japan, which contributes to the administration of medical policies on the perinatal care of migrant mothers. This study used data from the vital statistics reported by the Ministry of Health, Labour and Welfare (MHLW) of Japan and from foreign resident statistics reported by Immigration Services Agency (ISA) of Japan. To show areal inequality in the number of live births by migrant mothers, we applied the Gini coefficient. This study demonstrated that the number of live births by migrant mothers increased from 16,154 (1.31% of the total) in 1990 to 26,517 (3.08%) in 2020. It also showed stronger areal inequality at prefecture level by Japanese mothers (Gini coefficient; 0.64 vs 0.46 in 2020), and this areal inequality has increased during the last decade. This study also illustrated that the frequency of maternal nationality of newborns from migrant mothers has been altered in the last decade, especially in the composition of Asian countries. In conclusion, the number of live births by migrant mothers in Japan has been progressively increasing; however, this trend is excessively concentrated in specific areas in Japan. These tendencies are expected to become more prominent in the future, and their possible impacts on medical institutions and administrative agencies in specific areas that treat migrant mothers should be investigated and discussed.