Trends in and determinants of neonatal and infant mortality in Nigeria based on Demographic and Health Survey data

Causes of infant and under-five (under-5) morbidity and mortality among hospitalized patients in Southern Nigeria: A hospital based study

Background

Rate and pattern of under-five mortality is a reflection of a society's healthcare system and quality of life. This study is aimed at reviewing the causes of infants and under-five morbidity and mortality in Calabar, Southern Nigeria.

Methods

This study used retrospective descriptive cross-sectional design. We did a retrospective collation of data on under-five morbidity and mortality from 2012 to 2017 of under-five patients admitted or died while in admission in University of Calabar Teaching Hospital. The causes of morbidity and mortality were reported based on International Classification of Diseases 10 (ICD-10). The morbidity, mortality and fatality rates were computed.

Results

A total of 11,416 under-five admissions and 391 deaths were recorded within the study period giving a fatality rate of 3.4%. Age 1-4 years category represented 50.5% of the admissions while infants (<1 year) constitute majority of the deaths (64.7%). There were 5652 infant admissions and 253 infant deaths giving fatality rate of 4.5% within the study period. Males constituted majority (55.8%) of under-five morbidity whereas females constituted majority (51.2%) of the deaths. Conditions originating from perinatal period; and infectious and parasitic diseases were the leading broad cause of under-five mortality. Specific disease analysis showed sepsis/septicemia; congenital infectious and parasitic diseases; slow fetal growth, malnutrition and short gestation as the chief causes of both infant and under-five mortality.

Conclusion

The leading causes of under-five deaths in the studied population are amenable. Improved healthcare and antenatal will be of immense benefit.

Factors associated with infant mortality in Nigeria: A scoping review

BACKGROUND

Infant mortality persists as a global public health concern, particularly in lower-middle-income countries (LIMCs) such as Nigeria. The risk of an infant dying before one year of age is estimated to be six times higher in Africa than in Europe. Nigeria recorded an infant mortality rate of 72.2 deaths per 1,000 live births in 2020, in contrast to the global estimate of 27.4 per 1,000 live births. Several studies have been undertaken to determine the factors influencing infant mortality.

OBJECTIVE

This scoping review sought to identify and summarise the breadth of evidence available on factors associated with infant mortality in Nigeria.

METHODS

This review followed the five-stage principles of Arksey and O'Malley's framework. Four electronic databases were searched with no limit to publication date or study type: Ovid MEDLINE, PubMed, CINAHL Complete, and Web of Science. Selected studies were imported into Endnote software and then exported to Rayyan software where duplicates were removed. Included articles were thematically analysed and synthesised using the socioecological model.

RESULTS

A total of 8,139 references were compiled and screened. Forty-eight articles were included in the final review. At the individual level, maternal- and child-related factors were revealed to influence infant mortality; socioeconomic and sociocultural factors at the interpersonal level; provision and utilisation of health services, health workforce, hospital resources and access to health services at the organisational level; housing/neighbourhood and environmental factors at the community level; and lastly, governmental factors were found to affect infant mortality at the public policy level.

CONCLUSION

Factors related to the individual, interpersonal, organisational, community and public policy levels were associated with infant mortality in Nigeria.

Effects of short birth interval on different forms of child mortality in Bangladesh: Application of propensity score matching technique with inverse probability of treatment weighting

BACKGROUND

The prevalence of Short Birth Interval (SBI) is higher in Low- and Middle-Income countries (LMICs), including Bangladesh. Previous studies in LMICs have estimated the effects of SBI on child mortality by comparing two unequal groups of mothers based on their socio-economic status. This approach may lead to overestimation or underestimation of the true effect of birth interval on child mortality, particularly when sample sizes are relatively small.

OBJECTIVE

We determined the effects of SBI on several forms of child mortality in Bangladesh by comparing two equal groups created by applying the propensity score matching technique.

METHODS

This study analyzed data from 5,941 mothers and 1,594 health facilities extracted from the 2017/18 Bangladesh Demographic and Health Survey and the 2017 Bangladesh Health Facility Survey. The exposure variable was SBI (defined as the interval between two subsequent births <33 months: yes, no), while the outcome variables were neonatal mortality (defined as mortality within 28 days of birth: yes, no), infant mortality (defined as mortality within 1 year of birth: yes, no), and under-five mortality (defined as mortality within 5 years of birth: yes, no). Multilevel Poisson regression based on inverse probability treatment weights was used to determine the association between exposure and outcome variables.

RESULTS

The prevalence rates of neonatal, infant, and under-five mortality were 48.8, 30.8, and 23.1 per 1000 live births, respectively. Newborns of SBI mothers were found to have a 63% higher likelihood of neonatal mortality (aPR, 1.63; 95% CI, 1.08-2.46) compared to newborns of non-SBI mothers. Furthermore, the prevalence of infant mortality and under-five mortality was 1.45 times higher (aPR, 1.45; 95% CI, 1.01-2.08) and 2.82 times higher (aPR, 2.82; 95% CI, 2.16-3.70), respectively, among babies born in a short interval of their immediately preceding sibling as compared to babies born in a normal interval of their immediately preceding sibling.

CONCLUSIONS

Findings of this study indicate that SBI is an important predictor of child mortality. Consequently, around 1 million children born in a short interval every year in Bangladesh are at risk of dying before reaching their fifth birthday. This indicates a challenge for Bangladesh to achieve the SDG 3 target to reduce neonatal and under-five mortality to 12 and 25 deaths per 1000 live births, respectively. Hence, awareness-building programs about the adverse effects of SBI and strengthening existing healthcare facilities are important.

Traditional birth attendant-assisted versus unassisted births: a comparison of neonatal deaths in Nigeria, 2008-2018

PURPOSE

to directly compare the risk of neonatal death between traditional birth attendant (TBA)-assisted and unassisted deliveries in Nigeria.

METHODS

Using data on live births from the 2008, 2013, and 2018 Nigeria Demographic and Health Surveys, this cross-sectional study compared risk of neonatal death for TBA-assisted versus unassisted births. We used survey-featured logistic regression to estimate the odds of neonatal death. Survey year-stratified and propensity score-matched (PSM) estimates were obtained. Multivariate imputation by chained equation (MICE) for missing data was conducted.

RESULTS

A total of 28, 922 births were included. Regression and PSM analysis of pooled data showed that unassisted births had lower odds of neonatal death compared to TBA-assisted births, (aOR 0.81, 95% CI: 0.65,1.00) and (aOR 0.80, 95% CI: 0.64,1.00), respectively. Regression analysis by survey year yielded non-significant higher odds of neonatal death for TBA-assisted births. Pooled estimates from MICE showed non-significant higher odds of death for TBA-assisted births.

CONCLUSIONS

These findings indicate that birth care by TBAs do not necessarily lead to better neonatal survival. Jurisdictions seeking to allow continued operation of TBAs need to consider measures such as training, supervision, and regulation to ensure the safety of newborns.

Negative effects of short birth interval on child mortality in low- and middle-income countries: A systematic review and meta-analysis

Methods

Eight databases, PubMed, CINAHL, Web of Science, Embase, PsycINFO, Cochrane Library, Popline, and Maternity and Infant Care, were searched, covering the period of January 2000 to January 2022. Studies that had examined the association between SBI and any form of child mortality were included. The findings of the included studies were summarized through fixed-effects or random-effects meta-analysis and the model was selected based on the heterogeneity index.

Results

A total of 51 studies were included. Of them, 19 were conducted in Ethiopia, 10 in Nigeria and 7 in Bangladesh. Significant higher likelihoods of stillbirth (odds ratio (OR) = 2.11; 95% confidence interval (CI) = 1.32-3.38), early neonatal mortality (OR = 1.58; 95% CI = 1.04-2.41), perinatal mortality (OR = 1.71; 95% CI = 1.32-2.21), neonatal mortality (OR = 1.85; 95% CI = 1.68-2.04), post-neonatal mortality (OR = 3.01; 95% CI = 1.43-6.33), infant mortality (OR = 1.92; 95% CI = 1.77-2.07), child mortality (OR = 1.67; 95% CI = 1.27-2.19) and under-five mortality (OR = 1.95; 95% CI = 1.56-2.44) were found among babies born in short birth intervals than those who born in normal intervals.

Conclusions

SBI significantly increases the risk of child mortality in LMICs. Programmes to reduce pregnancies in short intervals need to be expanded and strengthened. Reproductive health interventions aimed at reducing child mortality should include proper counselling on family planning, distribution of appropriate contraceptives and increased awareness of the adverse effects of SBI on maternal and child health.

Factors Associated with Infant Deaths in Indonesia: An Analysis of the 2012 and 2017 Indonesia Demographic and Health Surveys

BACKGROUND

This exploratory study aimed to investigate factors related to infant deaths using a conceptual framework that explains the risk factors of infant deaths in developing countries.

METHODS

The study adopted a cross-sectional study design and used data from the 2012 and 2017 Indonesia Demographic and Health Surveys, with a sample of 3694 singleton live births in 2012 and 3413 in 2017.

RESULTS

Female infants had a lower chance of mortality compared to male infants [adjusted odds ratio (aOR) = 0.51; 95% confidence interval (CI) = 0.34-0.77]. Infants with a smaller birth size had a higher risk of infant death compared to those with an average size (aOR = 5.66; 95% CI = 3.66-8.77). The risk of infant death with a preceding birth interval of ≥24 months was lower than that with a preceding birth interval of <24 months (aOR = 0.48; 95% CI = 0.26-0.90). An older maternal age was a risk factor for infant death compared to younger mothers (aOR = 3.61; 95% CI = 1.42-9.23). Infants who were born in Sumatra (aOR = 0.38; 95% CI = 0.16-0.89) and Java and Bali (aOR = 0.33; 95% CI = 0.14-0.78) were less likely to die than infants who were born in Papua and Maluku.

CONCLUSIONS

A higher infant death risk was associated with male babies and a shorter birth interval (<24 months). Mothers who perceived their babies to be small and mothers who were older (35-49 years old) were high-risk factors for infant mortality. Mothers who lived in Java and Bali as well as Sumatera were less likely to experience infant mortality compared to those who lived in Papua and Maluku.