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Distant and proximate factors associated with maternal near-miss: a nested case-control study in selected public hospitals of Addis Ababa, Ethiopia

  • Ewnetu Firdawek Liyew1Email author,
  • Alemayehu Worku Yalew2,
  • Mesganaw Fantahun Afework3 and
  • Birgitta Essén4
BMC Women's HealthBMC series – open, inclusive and trusted201818:28

https://doi.org/10.1186/s12905-018-0519-y

Received: 5 June 2017

Accepted: 16 January 2018

Published: 27 January 2018

Abstract

Background

Ethiopia is one of the sub-Saharan Africa countries with the highest maternal mortality. Maternal near-misses are more common than deaths and statistically stronger for a comprehensive analysis of the determinants. The study aimed to identify the factors associated with maternal near-miss in selected public hospitals of Addis Ababa, Ethiopia.

Methods

We conducted a nested case-control study in five selected public hospitals of Addis Ababa, Ethiopia from May 1, 2015 to April 30, 2016. Participants were interviewed by well-trained data collectors using pre-tested questionnaire. Medical records were also reviewed to gather relevant information. World Health Organization criteria were used to identify maternal near-miss cases. A total of three controls matched for age and study area was selected for each maternal near-miss case. Bivariate and multivariable conditional logistic regressions were performed using Stata version 13.0.

Results

A total of 216 maternal near-miss cases and 648 controls were included in the study. The main factors associated with maternal near-miss were: history of chronic hypertension (AOR = 10.80,95% CI; 5.16–22.60), rural residency (AOR = 10.60,95% CI;4.59–24.46), history of stillbirth (AOR = 6.03,95% CI;2.09–17.41), no antenatal care attendance (AOR = 5.58,95% CI;1.94–16.07) and history of anemia (AOR = 5.26,95% CI;2.89–9.57).

Conclusions

There is a need for appropriate interventions in order to improve the identified factors. The factors can be modified through a better access to medical and maternity care, scaling up of antenatal care in rural areas, improve in infrastructure to fulfill referral chain from primary level to secondary and tertiary health care levels, and health education to pregnant women.

Keywords

Maternal near-missRisk factorsNested case-controlPublic hospitalsAddis AbabaEthiopia

Background

In September 2015, the United Nations (UN) General Assembly formally approved a set of 17 Sustainable Development Goals (SDG) as a follow-up to Millennium Development Goals (MDG). Improving maternal health remains an important topic of SDG which is to reduce the global Maternal Mortality Ratio (MMR) to less than 70 per 100,000 live births by 2030 [1]. According to the World Health Organization (WHO), the United Nations Children’s Fund (UNICEF), the United Nations Population Fund (UNFPA), the World Bank Group and the United Nations Population Division (2015) estimate, globally, 303,000 maternal deaths occurred in 2015 with sub-Saharan Africa alone accounts for 66% of the deaths [2].

Ethiopia is one of the sub-Saharan Africa countries with the highest rate of maternal mortality. According to the Ethiopian Demographic and Health Survey (EDHS) report, it was 676 per 100,000 live births in 2011 and the 2016 EDHS documented 412 deaths per 100,000 live births [3, 4]. The government of Ethiopia has made different strategies to lower the rate of maternal mortality. For instance, the members of women’s association of Ethiopia were trained to address social and structural barriers to sexual, reproductive, maternal and newborn health [5]. In addition to this, there was societal level poverty reduction, hospital level allocation of resources, improving skilled birth attendance and reducing home births [5, 6]. Despite all these efforts, there is no significant decline in maternal mortality in the country, where only 27.7% of women received delivery care from skilled provider [3]. Hence, there is a need to assess the possible factors that contributed to maternal mortality. However, maternal deaths are uncommon per each health facility. Thus, in this situation, studies on maternal near-miss could serve as a proxy for maternal death to evaluate quality of obstetric care in particular health institutions [7, 8]. Assessing near-miss has an advantage over maternal death as near-misses are more common and statistically robust [7, 8]. A maternal near-miss is defined by the WHO as ‘a woman who nearly died but survived a complication that occurred during pregnancy, childbirth or within 42 days of termination of pregnancy’ [9].

Different literatures on maternal near-miss around the globe revealed different factors. Advanced maternal age, race, lower socio-economic status, rural residence, less or no antenatal care (ANC) follow-up, multiple pregnancies, nulliparous, multiparous, previous cesarean section delivery, pre-existing medical conditions, overweight and underweight were documented as factors for maternal near-miss [1018].

The factors associated with maternal near-miss are not well documented in Ethiopia. Few previous published studies conducted in the country relied on patient record to assess predictors of maternal near-miss. Hence, these studies might have limitations of bias due to incompleteness and poor quality of the data at the health facility [19, 20]. However, the current study did not rely on the available hospital secondary data. The aim of this study was to identify the factors associated with maternal near-miss in selected public hospitals of Addis Ababa, Ethiopia.

Methods

Study settings and period

We conducted a study in five selected public hospitals of Addis Ababa, capital of Ethiopia from May 1, 2015 to April 30, 2016. The selection of hospitals was based on the number of deliveries conducted per year. In addition, presence of an Intensive Care Unit (ICU), maternity ward, blood transfusion service and availability of cesarean section (CS) delivery were considered in the selection of hospitals. Accordingly, Tikur Anbessa, St. Paul’s Hospital Millennium Medical College, Zewditu Memorial, Yekatit 12 and Gandhi Memorial Hospitals were selected. A total of 29,697 live birth deliveries took place in the participating hospitals during the study period. The details of settings with location map has been described elsewhere [21].

Study design

A nested case-control study design, matched for age and study setting was employed. Age was categorized in five year interval. Participants were followed from admission till discharge.

Inclusion criteria of cases

Women who were admitted to the selected hospitals during the study period for treatment of pregnancy-related complications (irrespective of gestational age), who delivered, or were within 42 days of termination of pregnancy, and fulfilled at least one of the conditions that is indicated in the WHO criteria presented in Table 1 [9] were included as cases.
Table 1

Identification criteria of maternal near-miss as used by the WHO 2011

Dysfunctional system

Clinical criteria

Laboratory markers

Management based proxies

Cardiovascular

Shock

Cardiac arrest

severe hypo perfusion

(lactate > 5 m mol/l or > 45 mg/dl)

severe acidosis (pH < 7.1)

Use of continuous vasoactive drugs

Cardio pulmonary resuscitation

Respiratory

Acute cyanosis

Gasping

severe tachypnea (respiratory rate > 40 breaths per minute)

severe bradypnea (respiratory

rate < 6 breaths per minute)

severe hypoxemia (O2 saturation < 90% for

≥60 min or PAO2/FiO2 < 200)

Intubation and ventilation not related to anesthesia

Renal

Oliguria non-responsive to fluids or diuretics

Severe

acute azotemia (creatinine ≥300 μmol/ml

or ≥3.5 mg/dl)

Dialysis for acute renal failure

Coagulation/hematological

Failure to form clots

severe acute thrombocytopenia (< 50,000 platelets/ml)

Massive transfusion of blood or red cells (≥5 units)

Hepatic

Jaundice in the presence of pre-eclampsia

severe acute hyperbilirubinemia

(bilirubin > 100 μmol/l or > 6.0 mg/dl)

 

Neurological

Prolonged unconsciousness (lasting

≥12 h)/coma (including metabolic

coma), stroke, uncontrollable fits/status epileptics, total paralysis

  

Uterine

  

Uterine hemorrhage or infection leading to hysterectomy

Exclusion criteria of cases

Those women who have been admitted for reasons not related to pregnancy, delivery or 42 days after termination of pregnancy were excluded.

Selection of controls

Women who came to the same hospital where the cases happened and, having a similar age- interval category with that of the cases and delivered without any complications were enrolled as a control. For each near-miss case, three controls that occurred within the same day of the near-miss event were included.

Sample size determination

The sample size was estimated using Epi Info 7 software using sample size determination for unmatched case-control studies. The parameters that were used to estimate the sample size were: confidence level of 95%, power of 80%, case-control ratio of 1:3, expected frequency of exposure in control to be 4.11%, and percent exposure among cases, 10.78%. It was estimated from one study in Ethiopia taking no ANC follow-up as one of the main exposure variable for maternal near-miss that provide the maximum sample size [20]. Accordingly, these yield a minimum sample size of 166 cases and 497 controls. Adding a 10% non-response rate, the final sample size required for the study was 183 cases and 547 controls. To increase the power of the study, all cases observed during one year period (collected for a different objective to determine the incidence of maternal near-miss, which was described elsewhere) [21], along with the corresponding three controls were included in the study.

Data collection

Women with a maternal near-miss condition and those without any complications during delivery were interviewed by a well-trained midwives and nurses using structured questionnaire. In addition, medical records were reviewed to gather relevant information. Information on socio-economic and demographic characteristics, reproductive health and obstetric history, and pre-existing medical conditions of the women were obtained from the participant’s record. The questionnaires were prepared following a thorough review of literatures. Obstetrics and Gynecology Ward, ICU and Emergency Gynecology Outpatient Department (OPD) of each hospital were visited to collect data. The questionnaires were pre-tested prior to the commencement of data collection to determine the appropriateness of the tool. Data collectors were given a three day training in order ensure consistency of data collection.

Data analysis

The data were entered using Epi Info 7 software and analyzed using Stata version 13.0. The data were cleaned before analysis. The outcome variable of the study was maternal near-miss. The independent variables which were identified from literatures includes: (i) socio-economic and demographic characteristics (educational level, place of residence, ethnicity, religion, marital status, maternal occupation), (ii) reproductive health and obstetric history of the women (antenatal care booking, parity, history of caesarian section delivery, multiple pregnancies, history of abortion, history of stillbirth, early marriage, female genital cutting) and (iii) pre-existing medical conditions (previous hypertension, previous anemia, human immunodeficiency virus (HIV), history of cardiac problems, history of diabetes mellitus (DM)).

Bivariate logistic regression was performed to examine whether there is a significant association between each individual independent variable and maternal near-miss. For each individual variable, the P-value, and unadjusted odds ratio (OR) with its 95% confidence interval, and the number and proportion of each variable of case and control were calculated.

Multivariable conditional logistic regression model was used to examine the independent effect of the factors on the occurrence of maternal near-miss. The variables that were mentioned as factors of maternal near-miss in our literature review were classified as either distant or proximate factors. Socio-economic and demographic variables were taken as a distant factors. Whereas, the rest such as, reproductive health and obstetric history of the women and pre-existing medical conditions were considered as proximate factors. Since distant factors are conceptually related with the proximate factors for the occurrence of maternal near-miss, hierarchical model for the analysis is recommended [22]. Based on this hierarchical order, we have developed two models. All socio-economic and demographic variables with p <  0.2 in the bivariate logistic regression analysis were fitted with model 1. Those variables that were significant in model 1 (p <  0.05) were fitted with model 2. Model 2 contained those significant variables from model 1 and proximate variables. For each model and variables their adjusted OR, its 95% CI and P-value were calculated.

The model fitness was estimated using stata’s fitstat command. Good fit was indicated by a significance value less than 0.05. Both models which were used to determine the factors associated with maternal near-miss were shown to be significant (p <  0.0001), which shows the models were best fit.

Multicollinearity among independent variables was assessed by calculating variance inflation factors (VIF). No multicollinearity was suggested during the current analysis as all the calculated VIF were less than 10.

We also defined some of the important independent variables. Educational level was categorized into illiterate (no formal education), primary (grade 1–8), secondary (grade 9–12), and higher education (> 12). Antenatal care visit was considered to be present if a woman reported to have ANC during current pregnancy. Monthly income was categorized into the lowest 25 percentile (below 68 USD), between 25 and 75 percentile (68–181 USD), and above 75 percentile (greater than 181 USD). Marriage before age of 18 was considered as early (based on jurisdiction). Pre-existing medical conditions such as chronic hypertension, anemia, HIV, maternal cardiac disease and DM were considered as present if the women reported their presence before the current pregnancy.

Results

Characteristics of the participants

During the one-year period, a total of 238 maternal near-miss cases were reported in all participating hospitals. However, 22 cases were excluded because of incomplete data. Hence, the study included 216 maternal near-miss cases and 648 corresponding controls.

Women with maternal near-miss tended to be illiterate (P <  0.0001), never married (p = 0.011), reside in rural area (p < 0.0001), and had a less monthly income (p < 0.0001) compared to controls (Table 2).
Table 2

Distribution of selected socio-economic, demographic, reproductive health and obstetric characteristics of women with and without maternal near-miss in Addis Ababa, Ethiopia, 2016

 

Near-miss (n = 216)

Controls (n = 648)

COR (95% CI)

P-value

Characteristics

n (%)

n (%)

  

Educational level

 Illiterate

61 (30.0)

75 (11.7)

3.28 (1.85–5.84)

< 0.0001

 Primary

63 (31.0)

214 (33.4)

1.23 (0.70–2.15)

0.470

 Secondary

57 (28.1

256 (39.9)

0.91 (0.52–1.57)

0.724

 Higher

22 (10.8)

96 (15)

1.00

 

Place of residency

 Urban

159 (73.6)

634 (97.8)

1.00

 

 Rural

57 (26.4)

14 (2.2)

13.0 (7.12–23.8)

< 0.0001

Marital status

   

0.01

 Married

200 (92.6)

627 (96.8)

1.00

 

 Never married

16 (7.4)

21 (3.2)

2.38 (1.22–4.65)

0.011

Monthly income

  > 68 USD

81 (37.5)

111 (17.1)

2.19 (1.43–3.34)

< 0.0001

 68–181 USD

74 (34.3)

370 (57.1)

0.54 (0.36–0.79)

0.002

  > 181 USD

61 (28.2)

167 (25.8)

1.00

 

Received ANC

    

 Yes

183 (84.7)

638 (98.5)

1.00

 

 No

33 (15.3)

10 (1.5)

10.8 (5.16–22.6)

< 0.0001

Number of children

 0–2

171 (79.2)

527 (81.3)

0.99 (0.63–1.56)

0.985

 3–4

34 (15.7)

110 (17)

1.00

 

  > 5

11 (5.1)

11 (1.7)

3.53 (1.34–9.27)

0.010

Undergone FGC

 Yes

135 (64.6)

383 (59.6)

0.89 (0.59–1.33)

0.225

 No

74 (35.4)

260 (40.4)

1.00

 

History of stillbirth

 Yes

21 (9.7)

21 (3.2)

3.45 (1.79–6.68)

< 0.0001

 No

195 (90.3)

627 (96.8)

1.00

 

Early marriage

 Yes

43 (21.5)

90 (14.5)

1.97 (1.21–3.19)

0.006

 No

157 (78.5)

532 (85.5)

1.00

 

Bold data are those which are significant and their significance is indicated by the P-values expressed at the right end of each ORs

Compared to the control groups, women with maternal near-miss case were more often did not attend ANC, have greater than five children, have a history of stillbirth and experienced an early marriage, all statistically significant (p < 0.05). However, there were no statistically significant difference between cases and controls with regard to presence of previous caesarean section delivery, history of abortion and undergoing a female genital cutting (Table 2).

Cases and controls also differed significantly with regard to the presence of previous medical conditions such as chronic hypertension, anemia, and cardiac problems. However, a significant difference was not observed among the two groups with regard to the presence of HIV and DM (Table 3).
Table 3

Distribution of selected previous medical conditions of cases and controls in Addis Ababa, Ethiopia, 2016

 

Near-miss (n = 216)

Controls (n = 848)

COR (95% CI)

p-value

Characteristics

n (%)

n (%)

  

Previous hypertension

 Yes

56 (25.9)

16 (2.5)

13.3 (7.16–24.9)

< 0.0001

 No

160 (74.1)

632 (97.5)

1.00

 

Previous anemia

 Yes

73 (33.8)

64 (9.9)

4.66 (3.12–6.95)

< 0.0001

 No

143 (66.2)

584 (90.1)

1.00

 

History of cardiac problem

 Yes

11 (5.1)

5 (0.8)

6.6 (2.29–18.9)

< 0.0001

 No

205 (94.9)

643 (99.2)

1.00

 

Bold data are those which are significant and their significance is indicated by the P-values expressed at the right end of each ORs

Determinants of maternal near-miss

In order to know the factors associated with maternal near-miss, two models were used in a multiple conditional logistic regression analysis. Model one contained five variables which were significant in bivariate analysis (educational level, place of residence, ethnicity, marital status and monthly income). However, the result of the first model showed that only place of residence was found to be associated with maternal near-miss (Table 4). The second model contained eleven variables and five variables remained significant. The factors associated with maternal near-miss in the second model were: history of chronic hypertension (AOR = 10.80,95% CI; 5.16–22.60), rural residency (AOR = 10.60,95% CI;4.59–24.46), history of stillbirth (AOR = 6.03,95% CI;2.09–17.41), no ANC attendance (AOR = 5.58,95% CI;1.94–16.07) and history of anemia (AOR = 5.26,95% CI;2.89–9.57) (Table 5). However, the study did not find that female genital cutting was a determinant factor for maternal near-miss.
Table 4

Factors associated with maternal near-miss in model one multiple conditional logistic regression analysis, Addis Ababa, Ethiopia, 2016

 

Model 1

 

AOR (95% CI)

p-value

Characteristics

  

Place of residence

 Rural

6.86 (3.42–13.76)

< 0.0001

 Urban

1

 

Educational level

 Illiterate

1.91 (0.95–3.83)

0.068

 Primary

1.29 (0.68–2.45)

0.429

 Secondary

1.12 (0.62–2.04)

0.699

 Higher

1.00

 

Ethnicity

 Amhara

1.00

 

 Oromo

1.32 (0.82–2.13)

0.248

 Gurage

0.66 (0.37–1.21)

0.178

 Tigre

1.01 (0.41–2.47)

0.975

 Silte

0.92 (0.36–2.36)

0.867

 Other

0.86 (0.39–1.89)

0.708

Marital status

 Married

1.00

 

 Never married

1.21 (0.54–2.72)

0.642

Monthly income

  < 68 USD

1.62 (0.95–2.77)

0.075

 68–181 USD

0.65 (0.42–1.02)

0.061

  > 181 USD

1.00

 

Bold data are those which are significant and their significance is indicated by the P-values expressed at the right end of each ORs

Table 5

Factors associated with maternal near-miss in the last model multiple conditional logistic regression analysis, Addis Ababa, Ethiopia, 2016

 

Model 2

 

AOR (95% CI)

p-value

Characteristics

  

Place of residence

 Rural

10.60 (4.59–24.46)

< 0.0001

 Urban

1

 

Received ANC

 Yes

1

 

 No

5.58 (1.94–16.07)

0.001

Number of children

 0–2

2.16 (0.09–5.28)

0.09

 3–4

1

 

  > 5

4.27 (0.65–27.98)

0.13

History of still birth

 Yes

6.03 (2.09–17.41)

0.001

 No

1

 

Early marriage

 Yes

1.35 (0.66–2.76)

0.411

 No

1

 

Previous hypertension

 Yes

10.80 (5.16–22.60)

< 0.0001

 No

1

 

Previous anemia

 Yes

5.26 (2.89–9.57)

< 0.0001

 No

1

 

History of cardiac problem

 Yes

3.17 (0.59–16.81)

0.175

 No

1

 

Bold data are those which are significant and their significance is indicated by the P-values expressed at the right end of each ORs

Discussion

History of chronic hypertension, rural residency, history of stillbirth, no antenatal care attendance and history of anemia were found to be correlated with the occurrence of maternal near-miss.

Among all characteristics, presence of previous chronic hypertension showed the strongest risk factor for the development of maternal near-miss. Women with chronic hypertension are at increased risk for several pregnancy complications which includes: pre-eclampsia, placental abruption, intrauterine growth retardation, CS delivery and pre-term delivery [23]. The finding was consistent with other studies. A study done in Nigeria reported a sevenfold increased risk of maternal near-miss in women with presence of previous chronic hypertension [15]. The observation was also similar to other studies in which the risk of maternal near-miss was higher among women with pre-existing hypertension [24, 25].

Another strong risk factor for maternal near-miss reported in the current study was place of residence. Accordingly, those women who reside in the rural area have higher odds of developing maternal near-miss. A similar finding was also reported in another study in Ethiopia [20]. Studies from Bolivia and Brazil also documented a similar finding [12, 26]. Women from rural area might walk longer to access health services. Particularly when maternal complications occurred, her chance of getting appropriate health care on time might be minimized which in turn increase her chance of morbidity.

Additionally, we found that presence of previous stillbirth in women was an important risk factor for maternal near-miss. After a stillbirth infant, women may experience different psychological as well as relational problems which might in turn increase the risk of maternal complications in subsequent pregnancies. The link between maternal chronic hypertension and stillbirth may also be an alternative explanation [23]. Hence, women who had a stillbirth might have a history of chronic hypertension, and thereby increase the odds of maternal near-miss. Todd et al. in their study on correlates of severe acute maternal morbidity in Kabul also demonstrated that prior stillbirth is a risk factor for maternal near-miss [27].

The study also showed that the odds of maternal near-miss was higher among those women who fail to attend ANC. Different evidences showed that ANC is effective to identify pre-existing factors that could increase the risk of complications during pregnancy or delivery [28, 29]. Protective effect of ANC attendance for maternal near-miss event was also noted in other study too [15]. No ANC attendance could also be associated with some of the identified risk factors of maternal near-miss in the current study such as history of stillbirth and rural residency. However, we have checked the interaction among these variables, and no interaction was noted.

It was also observed that women with a history of anemia have higher odds of maternal near-miss than those without a prior history of anemia. Untreated anemia can lead to post-partum hemorrhage and hypovolemic shock and is a common cause of adverse maternal outcomes [30]. The higher risk of maternal near-miss for women with a prior history of anemia has also been identified in previous studies [14, 31].

Our study did not find that female genital cutting (FGC) was a determinant factor for maternal near-miss events. However, in a WHO multi-center study of female genital cutting, adverse obstetric outcomes were more frequent among cut than uncut women [32]. The possible reason for not getting a significant result in our study might be the fact that the study being underpowered for this specific factor.

This study is the first of its kind in Ethiopia to document the factors associated with maternal near-miss using the newly developed WHO case identification criteria. The use of nested case-control study design had also the advantage of ascertaining cause-effect relationship than a cross-sectional study. The cases and controls were also identified and interviewed prospectively, which helped us to avoid missing important confounding variables. To increase the power of the study, all cases observed during one-year period (collected for a different objective to determine the incidence of maternal near-miss) along with the corresponding three controls were included in the study. Potential sources of biases were also addressed in the current study. For instance, to minimize recall bias, we have taken hospital controls. Hence, the controls were more aware of the antecedent exposure so that there were equivalent degree of recall among cases and controls. In addition, cases and controls were interviewed when they became healthy near to their discharge time. To minimize bias related to measurements, the standardized WHO criteria were used to identify maternal near-miss cases. Furthermore, adequate training was given to data collectors, and there were strict supervision.

As the study was restricted only in public hospitals, it does not represent cases of maternal near-miss happened in private health facilities. The puerperium period defined by the WHO to define maternal near-miss lasts for 42 days post-partum. However, we followed the participants only till hospital discharge. Hence, we were unable to investigate the occurrence of other events such as maternal death occurred after maternal discharge. This might also underestimate the number of maternal near-miss cases reported during the study period.

Conclusions

History of chronic hypertension, rural residency, prior stillbirth, no antenatal care attendance and presence of prior anemia were the factors independently associated with the occurrence of maternal near-miss. Interventions aimed at improving better access to medical care for pregnant women with a history of chronic hypertension have a paramount importance. Health care professionals need to carefully plan and manage women with prior chronic hypertension. In addition, there is a need for counseling a pregnant woman about the risk of chronic hypertension during routine antenatal care visit. Strengthening the available health system in rural part of the country with focus on maternity service is also a crucial step to avert serious maternal complications. Scaling up of antenatal care in rural areas might have also a role to reduce obstetric risks among pregnant women. An effort to improve in infrastructure could also enhance referral chain from primary level to secondary and tertiary facility-level. Additionally, education of women on the importance of nutrition during pregnancy and supplementation of iron for pregnant women during ANC visits are important steps to avert critical morbidity experience related to anemia. It is also recommended to evaluate the underlying cause of anemia among pregnant women.

Abbreviations

ANC: 

antenatal care

AOR: 

adjusted odds ratio

CI: 

confidence interval

OR: 

odds ratio

USD: 

United States Dollar

VIF: 

variance inflation factor

WHO: 

World Health Organization.

Declarations

Acknowledgements

The authors would like to acknowledge the study participants for their willingness to share their information. We are also indebted to the staffs of all participating hospitals, data collectors and supervisors for their assistance during the data collection process.

Funding

This research was partially funded by Addis Ababa University and partially by African Doctoral Dissertation Research Fellowship (ADDRF) award offered by an African Population and Health Research Center (APHRC) in partnership with the International Development Research Centre (IDRC) (Grant Number: 107508–001). The funders have no role for design of the study, and, collection, analysis, and interpretation of data and in writing the manuscript.

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Authors’ contributions

EFL is the primary author, participated in the conceptualization, design, acquisition, analysis and interpretation of the data and drafted the manuscript. AWY was the primary academic advisor, contributed for design, acquisition, analysis and interpretation of the data and critically revised the manuscript. MFA and BE were co-advisors, contributed for design, acquisition, analysis and interpretation of the data and critically revised the manuscript for important intellectual content. All authors read and approved the final manuscript.

Ethics approval and consent to participate

The study was approved by the Institutional Review Board of the College of Health Sciences, Addis Ababa University (Protocol number: 058/14/SPH, Date: January 2015). In order to review the participants’ record, permission was obtained from the administrators of each participating hospital. For observational studies, taking verbal consent is the standard requirement of the Institutional Review Board of Addis Ababa University. Hence, the participants gave verbal consent to be enrolled in the study after they received an adequate explanation of the study aim, benefits and potential harm. Privacy of the participants was maintained throughout the interview process. The confidentiality of all the information collected was strictly kept. The participants received an assurance that participation was voluntary and were informed as if they have full right of withdrawal from the study without affecting the care they were permitted to. Tikur Anbessa, St. Paul’s Hospital Millennium Medical College, Zewditu Memorial, Yekatit 12 and Gandhi Memorial Hospitals were selected for the current study.

Consent for publication

Not applicable for this section.

Competing interests

The authors declare that they have no competing interests.

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Authors’ Affiliations

(1)
Department of Nursing, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia
(2)
Department of Preventive Medicine, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
(3)
Department of Reproductive Health and Health Service Management, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
(4)
Department of Women’s and Children’s Health, International Maternal and Child Health, Uppsala University, Uppsala, Sweden

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