Learning Causes of Functional Dynamic Targets: Screening and Local Methods.

This paper addresses the challenge of identifying causes for functional dynamic targets, which are functions of various variables over time. We develop screening and local learning methods to learn the direct causes of the target, as well as all indirect causes up to a given distance. We first discuss the modeling of the functional dynamic target. Then, we propose a screening method to select the variables that are significantly correlated with the target. On this basis, we introduce an algorithm that combines screening and structural learning techniques to uncover the causal structure among the target and its causes. To tackle the distance effect, where long causal paths weaken correlation, we propose a local method to discover the direct causes of the target in these significant variables and further sequentially find all indirect causes up to a given distance. We show theoretically that our proposed methods can learn the causes correctly under some regular assumptions. Experiments based on synthetic data also show that the proposed methods perform well in learning the causes of the target.

Trends and causes of maternal death at the Lagos University teaching hospital, Lagos, Nigeria (2007-2019).

BACKGROUND: Nigeria has one of the worst global maternal mortality ratios (MMR). Institutional audit is invaluable in providing useful information for formulating preventive interventions. OBJECTIVE: To evaluate the trends, causes and socio-demographic characteristics of maternal mortality at a tertiary institution in South-western Nigeria over a period of 13 years (2007-2019). METHODOLOGY: Cross sectional and temporal trend analysis of maternal deaths were conducted using chart reviews from 2007 to 2019. Socio-biological characteristics, booking status and ranking of clinical causes of maternal deaths were derived from patients' chart review (2007-2019). Bivariate analysis and Annual percent change (APC) of the observed trends was respectively conducted using Stata version 17 and Joinpoint version 4.5.0.1 software respectively. RESULTS: In the period 2007-2019, the mean age at maternal death was 30.8 ± 5.9 years and 88.8% of mortalities occurred among the "unbooked" women. The leading causes of direct maternal mortality were Hypertension (27.0%), Sepsis (20.6%) and haemorrhage (18.7%), while anaemia in pregnancy (3.2%), Human Immunodeficiency Virus (3.2%) and Sickle Cell Disease (2.4%) were the leading indirect causes of maternal mortality Joinpoint estimates showed a statistically significant increase in MMR of about 3.4% per annum from 2211 per 100,000 live births in 2007 to 3555.6 per 100,000 live births in 2019 (APC: +3.4%, P-value < 0.001). CONCLUSION: Contrary to some other reports, there was an increase in the institutional MMR between 2007 and 2019 even though the leading causes of death remained similar. Targeted interventions based on accurate data are urgently required in order to achieve the Sustainable Development Goal (SDG) 3.1.

Non-obstetric causes of severe maternal complications: a secondary analysis of the Nigeria Near-miss and Maternal Death Survey.

OBJECTIVE: To evaluate the burden, causes and outcomes of severe non-obstetric maternal complications in Nigerian public tertiary hospitals. DESIGN: Secondary analysis of a nationwide cross-sectional study. SETTING: Forty-two tertiary health facilities. POPULATION: Women admitted with complications during pregnancy, childbirth or puerperium. METHODS: All cases of severe maternal outcome (SMO: maternal near-miss or maternal death) due to non-obstetric causes were prospectively identified over a 1-year period. Maternal near-miss was defined using organ-system dysfunction (WHO), clinical, or management-based criteria. MAIN OUTCOME MEASURES: Causes and contributions of non-obstetric complications to SMO; fetal and neonatal outcomes; health service events associated with non-obstetric complications; and mortality index (% of maternal death/SMO). RESULTS: Of 100 107 women admitted with complications, 9401 (9.4%) were for non-obstetric causes; and 4.0% (375/9401) suffered severe non-obstetric complications. Of the 375 cases of severe non-obstetric complications, 48.8% (183/375) were near-misses and 51.2% (192/375) were maternal deaths. Severe anaemia unrelated to haemorrhage contributed 61.2% of near-misses and 32.8% of maternal deaths. The highest mortality indices were observed for cancer (91.7%), hepatic diseases (81.8%) and HIV/AIDS/HIV wasting syndrome (80.4%). Fatality was significantly high with extremes of age and no formal education. Regarding organ dysfunctions, neurological (77.1%) and cardiovascular (75.0%) dysfunctions had the highest mortality indices. Perinatal mortality was 65.9%. Time from diagnosis of severe non-obstetric complications to review by senior medical personnel, and to definitive intervention was <30 minutes in 30.2% and 29.8% of women with SMO, respectively. However, over 240 minutes elapsed between diagnosis and definitive intervention in more than one-third of women with SMO. CONCLUSION: Non-obstetric complications are associated with poorer pregnancy outcomes and deserve attention similar to that accorded obstetric complications. FUNDING: The original research that generated the data for this secondary analysis and the publication of this secondary analysis were funded by the UNDP-UNFPA-UNICEF-WHO-World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), a co-sponsored programme executed by the World Health Organization (WHO). TWEETABLE ABSTRACT: Non-obstetric causes are important contributors to maternal deaths and life-threatening morbidities in Nigerian hospitals.

[The increasing importance of extragenital pathology in the structure of maternal mortality in Russia]. / Vozrastaiushchee znachenie ékstragenital'noi patologii v strukture materinskoi smertnosti v Rossii.

OBJECTIVE: to determine the proportion of direct obstetric and indirect extragenital causes of maternal deaths in Russia in recent years. MATERIAL AND METHODS: Official statistical data on maternal mortality in Russia were analyzed according to the criteria of the 10th revision of the International Classification of Diseases and compared with those in European countries and the USA. RESULTS: In the past 10 years, Russia has registered a gradual decline in the single maternal mortality rate: 27.7 in 2005, 18.6 in 2010, 12.9 in 2013, 11.9 in 2014, 10.7 in 2015, and 8.3 in 2016 per 100,000 live births. This was mainly due to a substantial decrease in obstetric losses and to the expansion of a network of well-equipped perinatal centers. Stabilization of the proportion of extragenital causes was simultaneously found. Among them in 2014, cardiovascular diseases were a dominant cause of death (51.7%), followed by respiratory diseases (29.8%) and digestive diseases and other conditions (18.2%). The demographic, socioeconomic, and medical conditions for extragenital causes were analyzed and compared with those in European countries and the USA. Recommendations were given to improve the postmortem analysis of maternal deaths in Russia. CONCLUSION: It is necessary to improve the postmortem diagnosis of the direct and indirect causes of maternal deaths and to ensure the quality and completeness of autopsies in deceased women.

Indirect causes of severe adverse maternal outcomes: a secondary analysis of the WHO Multicountry Survey on Maternal and Newborn Health.

OBJECTIVE: To assess the proportion of severe maternal outcomes resulting from indirect causes, and to determine pregnancy outcomes of women with indirect causes. DESIGN: Secondary analysis of the WHO Multicountry Survey on Maternal and Newborn Health. SETTING: A total of 359 health facilities in 29 countries in Africa, Asia, Latin America, and the Middle East. SAMPLE: A total of 314 623 pregnant women admitted to the participating facilities. METHODS: We identified the percentage of women with severe maternal outcomes arising from indirect causes. We evaluated the risk of severe maternal and perinatal outcomes in women with, versus without, underlying indirect causes, using adjusted odds ratios and 95% confidence intervals, by a multilevel, multivariate logistic regression model, accounting for clustering effects within countries and health facilities. MAIN OUTCOME MEASURES: Severe maternal outcomes and preterm birth, fetal mortality, early neonatal mortality, perinatal mortality, low birthweight, and neonatal intensive care unit admission. RESULTS: Amongst 314 623 included women, 2822 were reported to suffer from severe maternal outcomes, out of which 20.9% (589/2822; 95% CI 20.1-21.6%) were associated with indirect causes. The most common indirect cause was anaemia (50%). Women with underlying indirect causes showed significantly higher risk of obstetric complications (adjusted odds ratio, aOR, 7.0; 95% CI 6.6-7.4), severe maternal outcomes (aOR 27.9; 95% CI 24.7-31.6), and perinatal mortality (aOR 3.8; 95% CI 3.5-4.1). CONCLUSIONS: Indirect causes were responsible for about one-fifth of severe maternal outcomes. Women with underlying indirect causes had significantly increased risks of severe maternal and perinatal outcomes.

Maternal mortality review in a major tertiary referral hospital in Liberia, 2018-2021.

Objectives: Anecdotal evidence showed increased maternal deaths at the major tertiary hospital over the past two years (2020-2021). We reviewed the maternal death audit data, identified the main causes of maternal death, and associated risk factors. Findings were shared with policymakers to help reduce maternal mortality. Study design: We conducted a secondary data review and descriptive analysis of maternal death at the tertiary hospital located in Monrovia. Method: The maternal death data were extracted from patient medical records, including death certificates and maternal audit records. The record of live births was obtained from the delivery register. Data were analyzed using Epi Info version 7.2 Maternal mortality ratio (MMR) was estimated, the leading direct and indirect causes of maternal death were identified, and the factors associated with maternal death were explored using logistic regression at a 5% level of significance. Results: There are a total of 233 maternal deaths and 14, 879 live births giving a maternal mortality ratio (MMR) of 1565 per 100,000 live births during the period under review. The median age of the mothers at death was 29 (14-45) years. About 40.3% (94/233) of cases died within <1 day of admission, referrals accounted for 59% (137/233) of the cases. Direct causes of death accounted for 66% (147/223). Hemorrhage [30.6% (45/147)], Eclampsia [(30/147) 20.6%] and Sepsis [(30/147) 20.6%] were the main direct causes of death while cardiovascular-related [18.4% (14/76)] and HIV/AIDS [16% (12/76)] were the leading indirect cause of death. Patients from referred other facilities were 7.9 times more likely to die as compared to non-referral (pOR:7.9, 95%CI: 5.9-10.6, p < 0.001). Conclusion: The maternal mortality ratio remained high. Referrals were done late. The Liberia Ministry of Health should equip more secondary-level health facilities and tertiary hospitals to handle maternal emergencies and sensitize the populace and healthcare workers on prompt identification and referral of obstetric emergencies. The MoH also needs to improve the blood transfusion services to help in the management of postpartum hemorrhage.

Hospital-Based Retrospective Cross-sectional Study to Analyse the Causes of Maternal Deaths at a Tertiary Health Care Facility.

Context: Maternal mortality is considered a key health indicator of Maternal and Child Health. Considering the fact that complications are preventable and most of them are modifiable, the study has been planned to analyse maternal deaths in order to suggest recommendations for preventing it. There are various delays according to the three-delay model at primary and secondary level; therefore, interventions are needed at those levels to prevent maternal deaths. Aims: To determine the various direct and indirect causes of maternal deaths, analyse the association of medical and social factors with maternal deaths and ^to determine the predictors of maternal deaths. Settings and Design: Hospital-based retrospective cross-sectional study of all the maternal deaths occurring in the last 4 years at a tertiary health care facility. Methods and Material: Data were collected from the Facility Based Maternal Death Review forms. Statistical Analysis Used: Data were entered and analysed by IBM SPSS version 25.0 software. Results: For maternal deaths, direct obstetric causes were responsible in 128 (74.4%) and indirect causes in 45 (26.2%) cases followed by unspecified causes in 78 (45.3%) and 1 (0.6%) coincidental cause. Statistically significant associations were observed between maternal death and period of gestation, mode of delivery and outcome of delivery (P = 0.12, P = 0.04 and P < 0.001, respectively). Conclusions: The health professionals of primary and secondary level should be well equipped to diagnose the complications and to manage it as early as possible. Thus, maternal mortality rates can be decreased to significant level.

Scoping maternal care through the lens of maternal deaths: A retrospective analysis of maternal mortality in Georgia.

INTRODUCTION: Reduction of the maternal mortality ratio (MMR) to 12 per 100,000 live births by 2030 is a priority target in Georgia. This study aims to assess and classify MM in Georgia by direct and indirect causes of death from 2014 to 2017, using data from the national surveillance system and in accordance with internationally approved criteria. MATERIAL AND METHODS: In this secondary study, MM data was retrieved from the Maternal and Children's Health Coordinating Committee and validated with data from the Vital Registry System and the Georgian Birth Registry. The study sample comprised 61 eligible MM cases. Relevant information was transferred to case-report forms to review and classify MM cases by direct and indirect causes of maternal death. RESULTS: The MMR during the study period was 26.7 per 100,000 live births. The proportion of direct causes of maternal death exceeded that of indirect causes, at 62% and 38%, respectively. The leading direct cause of maternal death was haemorrhage, while infection was the most frequent indirect cause. 52.5% of MM cases had no pre-existing medical condition, 62.3% had frequent adherence to antenatal care, and 52.5% had emergency caesarean sections. CONCLUSION: In Georgia, direct causes of maternal death exceed indirect causes in MM cases, with haemorrhage and infections, respectively, being most common. These findings are important to ensure optimal and continuous care and to accelerate progress in the reduction of MM in the country.

Review of Maternal Mortality at a Tertiary Care Hospital: What Have we Achieved?

BACKGROUND: Mothers are the nurturing pillar of the family. When a woman dies or becomes ill, either during or after giving birth, the consequences have the potential to affect not only the woman herself, but her family, society and the nation as well. OBJECTIVES: The study was designed to evaluate the maternal mortality ratio in a tertiary care hospital, assess the demographic profile, causes of maternal mortality, type of delay, and to suggest remedial measures for improvement. METHODS: A retrospective study was done from Jan 2013 to Dec 2016 at a tertiary care hospital in New Delhi. The medical records of all maternal deaths over a period of 4 years were reviewed and analyzed. RESULTS: The Maternal mortality ratio in the study period was 361.71/100,000 live births. The number of maternal death was 364. Unbooked cases accounted for the majority, i.e., 322, booked being 29 and registered 13. Two hundred and eleven cases were referred from other centers. Maximum deaths occurred between 21 and 30 years (73.07%). Anemia was widely prevalent. Most maternal deaths were due to direct causes like hypertensive disorders (28.02%), pregnancy-related infections (20.87%), and hemorrhage (12.36%). Among indirect causes, anemia, hepatitis, heart disease and respiratory illness accounted for 15.93, 11.53, 3.29 and 5.49%, respectively. Type I delay was most common (64.28%). CONCLUSION: Strengthening of the peripheral centers, hiring competent staffs and adequate blood bank facilities together with reference linkages must be done. Auditing the causes for maternal mortality is extremely helpful to identify the preventable causes and delays.

A Ten Year Audit of Maternal Mortality: Millennium Development Still a Distant Goal.

OBJECTIVE: To assess various causes of maternal mortality over a ten year period. DESIGN: Retrospective audit of hospital case records. SETTING: Tertiary care hospital. POPULATION: Pregnant women who expired in the premises of GTB Hospital. MATERIALS AND METHODS: A retrospective audit of case records of maternal deaths was conducted for a ten year period (January 2005 to December 2014). RESULTS: There were a total of 647 maternal deaths out of 1,16,641 live births. Sixty-eight percent (n = 445) of women were aged 21-30 years, while 10.5% (n = 68) were <20 years of age. The most common direct causes of maternal mortality were preeclampsia/eclampsia in 24.4% (n = 158), obstetric hemorrhage in 19.1% (n = 124) and puerperal sepsis in 14.5% (n = 94). With regards to indirect causes, anemia accounted for 15.3% (n = 99) mortality. There was only 1 (0.1%) mortality because of HIV/AIDS. Other notable causes of maternal mortality were infective hepatitis in 7.1% (n = 46). Tuberculosis, that is a disease of tropical countries, accounted for 3.0% (n = 20) of the total deaths. CONCLUSION: High maternal mortality in GTB hospital can be due to it being a tertiary hospital with referrals from all neighbouring states. Accessible antenatal care can help prevent these maternal deaths. Female education can be of immense help in dealing with the problem and improving the utilization of public health facilities. KEY MESSAGE: Preeclampsia/eclampsia and obstetric hemorrhage have been the main causes of maternal mortality for ages. Regular antenatal visits and the judicious training of grassroot level workers to pick-up complications early on in the pregnancy can be an effective way to deal the morbidity and mortality associated with these problems. The Janani Suraksha Yojana (JSY) and Janani Shishu Suraksha Karyakaram (JSSK) in India are pioneer steps in this direction.

Maternal mortality and its relationship to emergency obstetric care (EmOC) in a tertiary care hospital in South India.

OBJECTIVE: To determine the trends in maternal mortality ratio over 5 years at JIPMER Hospital and to find out the proportion of maternal deaths in relation to emergency admissions. METHODS: A retrospective analysis of maternal deaths from 2008 to 2012 with respect to type of admission, referral and ICU care and cause of death according to WHO classification of maternal deaths. RESULTS: Of the 104 maternal deaths 90% were emergency admissions and 59% of them were referrals. Thirty two percent of them died within 24 hours of admission. Forty four percent could be admitted to ICU and few patients could not get ICU bed. The trend in cause of death was increasing proportion of indirect causes from 2008 to 2012. CONCLUSION: The trend in MMR was increasing proportion of indirect deaths. Ninety percent of maternal deaths were emergency admissions with complications requiring ICU care. Hence comprehensive EmOC facilities should incorporate Obstetric ICU care.

Trends in maternal mortality in Hungary between 1978 and 2010.

OBJECTIVE: We evaluated the trends of the last decades in maternal mortality in Hungary and compared Hungarian results with those of other European countries. STUDY DESIGN: Cases of maternal death in Hungary during the study period from calendar year 1978 to 2010 were analyzed in a retrospective manner to characterize mortality distribution and to identify potential clinical or demographic predictors. Data in all cases were extracted both from the national Obstetric Registry operated by the National Institute of Gynecology and Obstetrics, from the Hungarian Central Bureau of Statistics and from the National Public Health and Medical Officer Service. Detailed clinical data were obtained based on obligatory reporting by individual clinical institutions. RESULTS: The annual maternal mortality rate (MMR) was 26.7 per 100,000 live births in the period 1978-1987 and declined significantly to 10.9 per 100,000 live births in the period 1997-2010. In the period 1988-1996 (with missing associated clinical and demographic data) the MMR was 16.4 per 100,000 live births. The proportion of delivery-associated causes of death increased significantly between the two study periods from 49.4% to 62.9% (p<0.05). Among obstetric causes of death, the rate of thromboembolism showed a significant increase, while there was a trend toward a decline in rate of maternal deaths attributable to hemorrhagic shock. Among medical causes of death not directly attributable to obstetric complications, the rate of renal and gastrointestinal etiologies declined significantly throughout the study periods. CONCLUSIONS: We observed a marked decline in maternal mortality during the last few decades in Hungary. Recent changes in mortality distribution highlight current characteristics of pregnancy care in Hungary and may help identify strategies for future improvement.

The burden of indirect causes of maternal morbidity and mortality in the processof obstetric transition: A cross-sectional multicenter study / A importância das causas indiretas da morbidade e mortalidade maternas no processo de transição obstétrica: um estudo multicêntrico transversal

Abstract Objective The aim of this study is to evaluate the burden of indirect causes of maternal morbidity/mortality in Brazil. Methods Secondary analysis of a multicenter cross-sectional study conducted in 27 referral obstetric units within the Brazilian Network for Surveillance of Severe Maternal Morbidity. Results A total of 82,388 women were surveilled: 9,555 women with severe maternal morbidity were included, and 942 (9.9%) of them had indirect causes of morbidity/ mortality. There was an increased risk of higher severity among the indirect causes group, which presented 7.56 times increased risk of maternal death (prevalence ratio [PR]: 7.56; 95% confidence interval [95%CI]: 4.99-11.45). The main indirect causes of maternal death were H1N1 influenza, sepsis, cancer and cardiovascular disease. Non-public antenatal care (PR: 2.52; 95%CI: 1.70-3.74), diabetes (PR: 1.90; 95%CI: 1.24-2.90), neoplasia (PR: 1.98; 95%CI: 1.25-3.14), kidney diseases (PR: 1.99; 95%CI: 1.14-3.49), sickle cell anemia (PR: 2.50; 95%CI: 1.16-5.41) and drug addiction (PR: 1.98; 95%CI: 1.03-3.80) were independentlyassociatedwithworseresultsintheindirectcausesgroup.Someprocedures for the management of severity were more common for the indirect causes group. Conclusion Indirect causes were present in less than 10% of the overall cases, but they represented over 40% of maternal deaths in the current study. Indirect causes of maternal morbidity/mortality were also responsible for an increased risk of higher severity, and they were associated with worse maternal and perinatal outcomes. In middle-income countries there is a mix of indirect causes of maternal morbidity/ mortality that points to some advances in the scale of obstetric transition, but also reveals the fragility of health systems.

Resumo Objetivo O objetivo deste estudo é avaliar a importância das causas indiretas da morbidade/mortalidade materna no Brasil. Métodos Análise secundária de um estudo transversal multicêntrico realizado em 27 unidades obstétricas de referência da Rede Brasileira de Vigilância da Morbidade Materna Grave. Resultados Um total de 82.388 mulheres foram avaliadas, sendo que 9.555 foram incluídas com morbidade materna grave, 942 (9,9%) delas com causas indiretas de morbidade/mortalidade. Houve risco aumentado de maior gravidade entre o grupo das causas indiretas, que apresentou risco de morte materna 7,56 vezes maior (razão de prevalência [RP]: 7.56; intervalo de confiança de 95% [IC95%]: 4.99-11.45). As principais causas indiretas de óbitos maternos foram a gripe H1N1, sepses, câncer e doença cardiovascular. Atenção pré-natal não pública (RP: 2,52; IC95%: 1,70-3,74), diabetes (RP: 1,90; IC95%: 1,24-2,90), neoplasia (RP: 1,98; IC95%: 1,25-3,14), doenças Renais (RP: 1,99; IC95%: 1,14-3,49), anemia falciforme (RP: 2,50; IC95%: 1,16-5,41) e toxicodependência (PR 1,98; IC95%: 1,03-3,80) foram associados independentemente com piores resultados no grupo de causas indiretas. Alguns procedimentos para o manejo da gravidade foram mais comuns para o grupo de causas indiretas. Conclusão As causas indiretas de morbidade mortalidade materna ocorreram em menos de 10% dos casos, mas foram responsáveis por mais de 40% das mortes maternas no presente estudo. As causas indiretas da morbidade mortalidade materna também se relacionaram com maior gravidade, e estiveram associadas a piores resultados maternos e perinatais. Nos países de renda média, há uma combinação de causas indiretas de morbidade/mortalidade materna que apontam para alguns avanços na escala de transição obstétrica, mas também mostram a fragilidade dos sistemas de saúde.