PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of plosonePLoS OneView this ArticleSubmit to PLoSGet E-mail AlertsContact UsPublic Library of Science (PLoS)
 
PLoS One. 2017; 12(9): e0183886.
Published online 2017 September 8. doi:  10.1371/journal.pone.0183886
PMCID: PMC5590854

Determinants of maternal near miss among women in public hospital maternity wards in Northern Ethiopia: A facility based case-control study

Dejene Ermias Mekango, Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Visualization, Writing – original draft, Writing – review & editing,1,* Mussie Alemayehu, Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing,2 Gebremedhin Berhe Gebregergs, Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing,2 Araya Abrha Medhanyie, Conceptualization, Writing – original draft, Writing – review & editing,2 and Gelila Goba, Conceptualization, Validation, Writing – original draft, Writing – review & editing3
Ganesh Dangal, Editor

Abstract

Background

In Ethiopia, 20,000 women die each year from complications related to pregnancy, childbirth and post-partum. For every woman that dies, 20 more experience injury, infection, disease, or disability. “Maternal near miss” (MNM), defined by the World Health Organization (WHO) as a woman who nearly dies, but survives a complication during pregnancy, childbirth or within 42 days of a termination, is a proxy indicator of maternal mortality and quality of obstetric care. In Ethiopia, few studies have examined MNM. This study aims to identify determinants of MNM among a small population of women in Tigray, Ethiopia.

Methods

Unmatched case-control study was conducted in hospitals in Tigray Region, Northern Ethiopia, from January 30-March 30, 2016. The sample included 103 cases and 205 controls recruited from among women seeking obstetric care at six (6) public hospitals. Clients with life-threatening obstetric complications, including hemorrhage, hypertensive diseases of pregnancy, dystocia, infection, and anemia or clinical signs of severe anemia (in women without hemorrhage) were taken as cases and those with normal obstetric outcomes were controls. Cases were selected based on proportion to size allocation while systematic sampling was employed for controls. Binary and multiple variable logistic regression (“odds ratio”) analyses were calculated at 95% CI.

Results

Roughly 90% of cases and controls were married and 25% experienced their first pregnancy before the age of 16 years. About two-thirds of controls and 45.6% of cases had gestational ages between 37–41 weeks. Among cases, severe obstetric hemorrhage (44.7%), hypertensive disorders (38.8%), dystocia (17.5%), sepsis (9.7%) and severe anemia (2.9%) were leading causes of MNM. Histories of chronic maternal medical problems like hypertension, diabetes were reported in 55.3% of cases and 33.2% of controls. Women with no formal education [AOR = 3.2;95%CI:1.24, 8.12], being less than 16 years of age at first pregnancy [AOR = 2.5;95%CI:1.12,5.63], induced labor[AOR = 3.0; 95%CI:1.44, 6.17], history of cesarean section[AOR = 4.6; 95% CI: 1.98, 7.61] or chronic medical disorder[AOR = 3.5;95%CI:1.78, 6.93], and women who traveled more than 60 minutes before reaching their final place of care[AOR = 2.8;95% CI: 1.19,6.35] had higher odds of experiencing MNM.

Conclusions

Macro-developments like increasing road and health facility access as well as expanding education will all help reduce MNM. Work should be continued to educate women and providers about common predictors of MNM like history of C-section and chronic illness as well as teenage pregnancy. These efforts should be carried out at the facility, community, and individual levels. Targeted follow-up with women with history of chronic disease and C-section could also help reduce MNM.

Introduction

At the conclusion of the Millennium Development Goals (MDG) era, maternal mortality had declined by 45%, an impressive reduction, but well short of the 75% reduction targeted by the global community. Today, approximately 830 women die daily from pregnancy or childbirth globally. Almost all of these deaths occur in low-resource settings and most could be prevented[1]. Among developing regions, Sub-Saharan Africa (SSA) has the highest maternal mortality ratio (MMR) at 640 per 100,000 live births[1, 2]. Women in SSA have a 1 in 39 lifetime risk of dying in childbirth compared to 1 in 3,800 women in industrialized countries[3]. For every woman who dies of pregnancy complications, about 20 more–roughly 7 million women annually—experience injury, infection, disease, or disability[4].

With the global community seeking to reduce MMR to less than 70 per 100,000 live births by 2030 as part of the Sustainable Development Goals, much work remains[1].

The World Health Organization (WHO) defines maternal near miss (MNM) as a woman who nearly dies, but survives a complication occurring during pregnancy, childbirth, or within 42 days of termination of pregnancy[5]. MNM’s harmful consequences are numerous, including separating mothers and newborns, interfering with bonding, lengthy hospital stays and healthcare costs, and emotional distress. MNM is increasingly used as an indicator of the quality of obstetric care and clinical practice [2, 6, 7].

Ethiopia is one of five countries globally that account for half of maternal deaths [8]. About 20,000 women die each year in Ethiopia from complications during pregnancy, childbirth and in the post-partum period[9]. A study at Ayder Referral Hospital in Tigray, Ethiopia, revealed 204 severe acute maternal morbidities (SAMM) and 9 direct maternal deaths, equating to 22.7 SAMMs for every maternal death. The study also showed 101 SAMMs per 1,000 deliveries and an MMR of 427 per 100,000 live births[10].

Knowing the determinants of maternal mortality and morbidity is essential to designing effective interventions, [9], but reliable information is not available[11][12, 13]. Therefore, our study sheds light on causes of MNM, a proxy for maternal mortality, and can contribute to the design of interventions to minimize pregnancy-related complications and maternal death.

Methods

The study was conducted in six (6) hospitals in Tigray, Ethiopia, from January 30 to March 30, 2016. Hospitals were randomly selected from 16 public hospitals in the region[14]. The study was a facility-based, unmatched case control design. Sample size was estimated using a double population proportion formula based on a study from Morocco that showed hypertensive disease contributing the most to MNM [15]. Based on the Morocco study, we hypothesized the proportion of chronic hypertension to be double in cases (63.9%) and controls (47%) at a 95% confidence level and 80% power of the test, with a 1:2 ratio for cases and controls. Final sample size was 308, of which 103 were cases and 205 controls.

We considered MNM as a condition meeting any of the five disease-specific criteria proposed by Filippi [16]. In sampled hospitals, using medical notes, any woman diagnosed with at least one of the following complications was considered as a case: severe obstetric hemorrhage leading to shock; hypertensive diseases of pregnancy, including eclampsia and severe preeclampsia; dystocia, including uterine rupture and impending rupture; infections, including hyper- or hypothermia or a clear source of infection and clinical signs of shock, and; anemia, including low hemoglobin (<6 g/dl) or clinical signs of severe anemia in women without hemorrhage. Women not meeting the above criteria were considered as controls. Cases were sequentially recruited whereas controls were selected through systematic sampling. Data was collected using a structured questionnaire, administered in-person by nurse midwives. Socio-demographic characteristics, obstetric history, and knowledge of pregnancy-related danger signs were collected.

Questionnaire was based on tools validated by the World Health Organization (WHO) and in different literature and adapted to include context-specific factors [1113, 15, 17]. Questionnaire was prepared in English, translated to Tigrigna, and back-translated to English separately by two individuals to ensure consistency. Data was collected by 12 nurse midwives with experience in obstetric care. Data collection was supervised and data checked for consistency and completeness. Incomplete and unclear questionnaires were returned to interviewers to be completed.

Data analysis

Data was entered, cleaned and analyzed using SPSS 20. Data was cleaned by running frequencies, cross-tabulation and sorting cases. Bar graphs and frequencies were used to represent results of categorical variables. Bivariate and multivariate logistic regression analyses were used to determine the association of independent variables with the dependent variable. Variables with p<0.25 in bivariate analysis were entered into a multivariate logistic regression model. Odds ratios with 95% confidence were computed to identify the presence and strength of associations, and statistical significance was declared if p<0.05 was found. The final model was checked using the Hosmer–Lemeshow goodness of fit test. Co-founders, interaction and multi-collinearity were checked to minimize bias.

Ethics statement

Study protocol was approved by the Institutional Research Review Board of Mekelle University’s College of Health Sciences and Community Services Ethical Review Committee. Permission was obtained from Tigray Regional Health Bureau and participating hospitals. Informed verbal consent was obtained from participants prior to enrollment in the study. Participation in the study was voluntary and participants were informed of the right to withdraw from the study. Data collection was conducted confidentially and data de-identified, de-linked and stored in a secure location.

Results

Socio-demographic characteristics of study participants

A total of 308 participants were interviewed, with a response rate of 100%. The 20–29 age groups accounted for37.9% of cases and 31.7% of controls. Seventy-eight percent (78%) of controls and 57.3% of cases were from urban areas. The percentage of cases with no formal education was double that of controls. Nearly one-fourth of cases and 41% of controls had completed secondary education. Nearly double the percentage of cases had husbands who were farmers compared to controls (Table 1).

Table 1
Socio-demographic characteristics of mothers admitted to public hospitals, Tigray, Northern Ethiopia, 2016.

Obstetric history

Approximately one-third (35.1%) of women were married before the age of 18 years and one-fourth had their first child before the age of 16 years. More than 40% of cases had five or more pregnancies compared to 20.5% of controls; roughly half of cases and controls had parity of 1–2. About two-thirds of controls and 45.6% of cases had gestational age between 37–41 weeks. Over three-fourths of controls and 52.4% of cases had no history of abortion, while 28.2% of cases and 17.1% of controls had one abortion. Among cases with history of abortion, 90% had a gestational age of 14–28 weeks; in contrast, 71% of controls had a gestational age of less than 14 weeks. Approximately, 80% of cases and controls had previously given birth at a facility. One-third (32.3%) of cases and 15.7% of controls had birth intervals of less than two years prior to the current delivery. Besides, nearly five-in-ten (44.7%) of the cases and two-in-ten (20%) of the controls had induction of labour (Table 2).

Table 2
Obstetric characteristics of mothers admitted in public hospitals, Tigray, Northern Ethiopia, 2016.

Health related characteristics of respondents

History of chronic medical disorder, including hypertension, diabetes mellitus (DM) and cardiovascular disease (CVD) was reported in 55.3% of cases compared to 33.2% of controls. Nearly half (46.6%) of cases and 19.5% of controls had one previous C-section. Among women with history of C-section, 40.8% of cases had two or more C-sections compared to 19% of controls.

Only 7.8% of cases and 1% of controls had no ANC follow-up. Nearly half (48.1%) of cases started ANC between 24–28 weeks of gestation, considerably later than the 90% of controls started ANC before 16 weeks of age. Skilled birth attendants delivered 97.4% of all mothers and more than half (52.4%) of cases and 78.5% of controls delivered at public hospitals. Half of cases and one-third of controls were delivered by emergency C-section. There was not a great deal of variation in how cases and controls were transported to care, though 60% of cases experienced a delay of greater than 60 minutes in arriving at care compared to 40% of controls. One-third (32.5%) of cases were referred from health centers, 36.2% from health posts, and 30% self-referred. In contrast, 75% of controls were referred from a health center or private clinic (Table 3).

Table 3
Health-related characteristics of mothers admitted in public hospitals, Tigray, Northern Ethiopia, 2016.

Clinical characteristics of maternal near misses

As shown in Table 4, disease specific diagnostic criteria of MNM among cases included severe obstetric hemorrhage (44.7%), hypertensive disorders (38.8%), dystocia (17.5%), sepsis (9.7%) and severe anemia (2.9%). Of cases with hemorrhagic disorders, 32% were complicated by post-partum hemorrhage. Eleven (11) cases had more than one life-threatening obstetric complication (Table 4).

Table 4
Clinical characteristics of maternal near misses of mothers admitted in public hospitals, Tigray, Northern Ethiopia, 2016.

Determinants of maternal near miss

Mothers who had no formal education had odds 3.2 times higher of experiencing MNM [AOR: 3.2, 95% CI: 1.24, 8.12]. Mothers who were less than 16 years of age at first pregnancy had odds 2.5 times higher [AOR = 2.5, 95% CI: 1.12, 5.63] of experiencing MNM and those for whom labor was induced had three times the odds [AOR = 3; 95% CI: 1.44, 6.17] of experiencing MNM. History of C-section was a strong determinant of MNM. Mothers with a prior C-section had odds four times higher [AOR = 4, 95% CI: 1.98, 7.61] of MNM and those with a history of chronic medical disorder had odds 3.5 times higher [AOR = 3.5, 95% CI: 1.78, 6.93]. Women that traveled more than 60 minutes to reach their final place of care had odds 2.8 times higher of experiencing MNM as those who traveled less than 30 minutes [AOR = 2.8, 95% CI:1.19,6.35] (Table 5).

Table 5
Determinants of maternal near miss among mothers admitted in public hospitals, Tigray, Northern Ethiopia, 2016.

Discussion

In our study, lack of formal education, being less than 16 years of age atfirstpregnancy, induced labor, history of chronic medical conditions and C-section, and having to travel greater than 60 minutes to reach final place of care were all determinants of maternal near miss (MNM).

The observed association between lack of education and MNM is consistent with another study in Ethiopia[12], while a study from Brazil showed no significant association between education and MNM[18]. Education increases women’s access to relevant information and may facilitate the financial means required to pay for transportationto care. These factors could collectively influence mothers’ awareness of the need to seek better medical services, including delivering in health facilities.

Another predictor of MNM was being below 16 years of age at first pregnancy.Younger women are often not physically capable of childbearing. What’s more, pregnancy during teenage years frequently takes place outside the context of marriage, exposing women to adverse social consequences. The Government of Ethiopia is laudably targeting a reduction in teenage pregnancy from 12% to 3% by 2020, which will help[11,19,20,21].

Women with pre-existing chronic conditions had higher odds of MNM, which is consistent with studies in Brazil and the Netherlands[20, 22], though another study showed co-morbidities were not significantly associated with MNM[23]. For example, chronic hypertension considerably increases the risk of complications like superimposed pre-eclampsia, placental abruption, intra-uterine growth retardation and pre-term delivery [22, 24]. Chronic hypertension, DM and CVD may be indicators for referral to higher facilities. Encouraging screening for non-communicable diseaseswould be a good step to reducing MNM.

Our study showed the odds of MNM were four times higher among women with history of C-section, which is supported by studies in Brazil and the United States [25, 26], though a multicenter study showed C-section may be an acceptable tradeoff in cases of unfavorable cervical or fetal conditions [27].Interrupting pregnancy with a C-section increases the risk of infection, hemorrhage, thromboembolism and other complications, which can increase the chance of SAMM and MNM [23, 28]. Previous C-section may predispose mothers to placenta accrete in scar tissue as well as uterine rupture in attempted vaginal birth after C-section, both of which could lead to MNM.

Similar to other studies, our study showed induced labor was associated with MNM[25, 29]. Among women with induced labor, 33.3% progressed to uterine rupture.

In our study, women that were required to travel more than 60 minutes to their final point of care were at considerably higher odds of MNM, a finding consistent with studies in Nigeria and Morocco [15, 17]. Lack of available transport, particularly during night hours, travel distance and lack of roads, seeking care first ata facility ill-equipped to provide EMOC, and lack of recognition of the severity of complications, can all prolong care-seeking, leading toMNM [9, 11, 3032].

Conclusion

This study identified several factors correlated with women having maternal near miss (MNM). Lack ofeducation, having a first pregnancy before the age of 16 years, induced labor, history of chronic medical disorder as well as C-section, and delay in reaching final point of care were all predictors of MNM. Among these, history of chronic medical disorder and C-section, lack of education, and induced labor were the strongest determinants. The Government of Ethiopia must continue to address structural causes of MNM like lack of road and health facility access, lack of education, and teenage pregnancy. It must simultaneously help women and providers understand determinants of MNM at the facility, community, and individual levels. Targeted follow-up of women with history of chronic disease and C-section could be a practical way to reduce MNM by helping at-risk mothers plan for delivery. Subsidizing transportation to facilities could also be a key to reducing MNM. The data analyzed here are robust and provide information that can contribute to global maternal morbidity research agenda and guiding practice and policy about the most frequent complications and organ dysfunctions related to MNM.

Strengths & limitations

Our study has several strengths, including employing a validated and standardized questionnaire that we tested and revised. Our study also used newly implemented Federal Ministry of Health (FMoH) guidelines on MNM to avoid misclassification. That said, the disease-specific criteria we used to classify MNM are not always straightforward. For instance, not all women with eclampsia experience MNM and not all women with an obstetric hemorrhage are critically ill, potentially resulting in over-reporting of MNM. Secondly, as an unmatched case-control design, our study may have included biases by not controlling for confounding by the matching factors.

Supporting information

Acknowledgments

Our gratitude goes to data supervisors, data collectors, study respondents, Mekelle University, and the Tigray Regional Health Bureau for facilitating the study.

Funding Statement

We would like to thank Mekelle University’s College of Health Sciences for funding this research.

Data Availability

Data Availability

All relevant data are within the paper and its Supporting Information files.

References

1. World Health Organization: Maternal mortality (Fact Sheet No. 348) [http://www.who.int/mediacentre/factsheets/fs348/en/]
2. WHO, UNICEF, UNFPA, The World Bank and the United Nations Population Division: Trends in Maternal Mortality: 1990 to 2013. In.; 2014.
3. WHO, UNICEF, UNFPA, and the World Bank:Trends in Maternal Mortality: 1990–2010. In.; 2011.
4. Paxton A, Wardlaw T: Are we making progress in maternal mortality? The New England journal of medicine 2011, 364(21):1990–1993. doi: 10.1056/NEJMp1012860 [PubMed]
5. World Health Organization: Evaluating the quality of care for severe pregnancy complications: The WHO near-miss approach for maternal health. 2011.
6. Requejo JH, Bryce J, Barros AJD, Berman P, Bhutta Z, Chopra M, et al. : Countdown to 2015 and beyond: fulfilling the health agenda for women and children. The Lancet 2015, 385(9966):466–476. [PubMed]
7. Say L, Souza JP, Pattinson RC: Maternal near miss—towards a standard tool for monitoring quality of maternal health care. Best Pract Res Clin Obstet Gynaecol 2009, 23(3):287–296. doi: 10.1016/j.bpobgyn.2009.01.007 [PubMed]
8. Hogan MC, Foreman KJ, Naghavi M, Ahn SY, Wang M, Makela SM, et al. : Maternal mortality for 181 countries, 1980–2008: a systematic analysis of progress towards Millennium Development Goal 5. Lancet (London, England) 2010, 375(9726):1609–1623. [PubMed]
9. Federal Ministry of Health[Ethiopia]: Maternal Death Surveillance and Response (MDSR) Technical Guideline. In. Addis Ababa: Federal Ministry of Health; 2014.
10. Berhane G G A, Van Roosmalen J, Van Den Akker T: Obstetric near-miss and maternal death: the case of Ayder Teaching Hospital, Mekelle,Ethiopia. Ethiopian Journal of Reproductive Health 2012, 6(1):56–63.
11. Central Statistical Agency [Ethiopia]: Ethiopia Demographic and Health Survey 2011. Addis Ababa, Ethiopia and Calverton, Maryland, USA; 2012.
12. Dile M A T, Seyum T Proportion of Maternal Near Misses and Associated Factors in Referral Hospitals of Amhara Regional State, Northwest Ethiopia: Institution Based Cross Sectional Study. Gynecol Obstet (Sunnyvale) 2015, 5(308).
13. Gedefaw M, Gebrehana H, Gizachew A, Taddess F: Assessment of Maternal Near Miss at Debre Markos Referral Hospital, Northwest Ethiopia: Five Years Experience. Open Journal of Epidemiology 2014, 04(04):199–207.
14. Tigray Regional Health Bureau: The Government of the National State of Tigrai: Report on the Health Status of Tigrai Region. In.; 2014.
15. Assarag B, Dujardin B, Delamou A, Meski FZ, De Brouwere V: Determinants of maternal near-miss in Morocco: too late, too far, too sloppy? PLoS One 2015, 10(1):e0116675 doi: 10.1371/journal.pone.0116675 [PMC free article] [PubMed]
16. Filippi V, Ronsmans C, Gohou V, Goufodji S, Lardi M, Sahel A, et al. : Maternity wards or emergency obstetric rooms? Incidence of near-miss events in African hospitals. Acta obstetricia et gynecologica Scandinavica 2005, 84(1):11–16. doi: 10.1111/j.0001-6349.2005.00636.x [PubMed]
17. Adeoye IA, Onayade AA, Fatusi AO: Incidence, determinants and perinatal outcomes of near miss maternal morbidity in Ile-Ife Nigeria: a prospective case control study. BMC pregnancy and childbirth 2013, 13:93 doi: 10.1186/1471-2393-13-93 [PMC free article] [PubMed]
18. Galvão LPL, Alvim-Pereira F, de Mendonça CMM, Menezes FEF, Góis KAdN, et al. : The prevalence of severe maternal morbidity and near miss and associated factors in Sergipe, Northeast Brazil. BMC pregnancy and childbirth 2014, 14(1):1–8. [PMC free article] [PubMed]
19. De Moraes AP, Barreto SM, Passos VM, Golino PS, Costa JE, Vasconcelos MX: Severe maternal morbidity: a case-control study in Maranhao, Brazil. Reproductive health 2013, 10:11 doi: 10.1186/1742-4755-10-11 [PMC free article] [PubMed]
20. Luexay P, Malinee L, Pisake L, Marie-Helene BC: Maternal near-miss and mortality in Sayaboury Province, Lao PDR. BMC public health 2014, 14:945 doi: 10.1186/1471-2458-14-945 [PMC free article] [PubMed]
21. Federal Ministry of Health [Ethiopia]: Health Sector Transformation Plan: 2015/16–2019/20. 2015.
22. Zwart JJ, Richters JM, Ory F, de Vries JI, Bloemenkamp KW, van Roosmalen J: Severe maternal morbidity during pregnancy, delivery and puerperium in the Netherlands: a nationwide population-based study of 371,000 pregnancies. BJOG: an international journal of obstetrics and gynaecology 2008, 115(7):842–850. [PubMed]
23. Lotufo FA, Parpinelli MA, Haddad SM, Surita FG, Cecatti JG: Applying the new concept of maternal near-miss in an intensive care unit. Clinics 2012, 67(3):225–230. doi: 10.6061/clinics/2012(03)04 [PMC free article] [PubMed]
24. Souza JP, Cecatti JG, Parpinelli MA, Serruya SJ, Amaral E: Appropriate criteria for identification of near-miss maternal morbidity in tertiary care facilities: a cross sectional study. BMC pregnancy and childbirth 2007, 7:20 doi: 10.1186/1471-2393-7-20 [PMC free article] [PubMed]
25. Dias MAB, Domingues RMSM, Schilithz AOC, Nakamura-Pereira M, Diniz CSG, Brum IR, et al. : Incidence of maternal near miss in hospital childbirth and postpartum: data from the Birth in Brazil study. Cadernos de Saúde Pública 2014, 30:S169–S181. [PubMed]
26. Gray KE, Wallace ER, Nelson KR, Reed SD, Schiff MA: Population-based study of risk factors for severe maternal morbidity. Paediatr Perinat Epidemiol 2012, 26(6):506–514. doi: 10.1111/ppe.12011 [PMC free article] [PubMed]
27. Zanette E, Parpinelli MA, Surita FG, Costa ML, Haddad SM, Sousa MH, et al. : Maternal near miss and death among women with severe hypertensive disorders: a Brazilian multicenter surveillance study. Reproductive health 2014, 11(1):4 doi: 10.1186/1742-4755-11-4 [PMC free article] [PubMed]
28. Pacheco AJ, Katz L, Souza AS, de Amorim MM: Factors associated with severe maternal morbidity and near miss in the Sao Francisco Valley, Brazil: a retrospective, cohort study. BMC pregnancy and childbirth 2014, 14:91 doi: 10.1186/1471-2393-14-91 [PMC free article] [PubMed]
29. Wianwiset W: Maternal Near Miss (Severe Morbidity) at Sisaket Hospital. Thai Journal of Obstetrics and Gynaecology 2012, 20:69–76.
30. Cecatti JG, Souza JP, Parpinelli MA, de Sousa MH, Amaral E: Research on severe maternal morbidities and near-misses in Brazil: what we have learned. Reproductive health matters 2007, 15(30):125–133. doi: 10.1016/S0968-8080(07)30333-9 [PubMed]
31. Filippi V, Richard F, Lange I, Ouattara F: Identifying barriers from home to the appropriate hospital through near-miss audits in developing countries. Best Pract Res Clin Obstet Gynaecol 2009, 23(3):389–400. doi: 10.1016/j.bpobgyn.2008.12.006 [PubMed]
32. Storeng KT, Baggaley RF, Ganaba R, Ouattara F, Akoum MS, Filippi V: Paying the price: the cost and consequences of emergency obstetric care in Burkina Faso. Social science & medicine (1982) 2008, 66(3):545–557. [PubMed]

Articles from PLoS ONE are provided here courtesy of Public Library of Science