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Abera Kenay Tura, Sicco Scherjon, Jos van Roosmalen, Joost Zwart, Jelle Stekelenburg, and Thomas van den Akker

Abstract

Background

Although maternal near miss (MNM) is often considered a ‘great save’ because the woman survived life-threatening complications, these complications may have resulted in loss of a child or severe neonatal morbidity. The objective of this study was to assess proportion of perinatal mortality (stillbirths and early neonatal deaths) in a cohort of women with MNM in eastern Ethiopia. In addition, we compared perinatal outcomes among women who fulfilled the World Health Organization (WHO) and the sub-Saharan African (SSA) MNM criteria.

Methods

In a prospective cohort design, women with potentially life-threatening conditions (PLTC) (severe postpartum hemorrhage, severe pre-(eclampsia), sepsis/severe systemic infection, and ruptured uterus) were identified every day from January 1st, 2016, to April 30th, 2017, and followed until discharge in the two main hospitals in Harar, Ethiopia. Maternal and perinatal outcomes were collected using both sets of criteria. Numbers and proportions of stillbirths and early neonatal deaths were computed and compared.

Results

Of 1054 women admitted with PTLC during the study period, 594 women fulfilled any of the MNM criteria. After excluding near misses related to abortion, ectopic pregnancy or among undelivered women, 465 women were included, in whom 149 (32%) perinatal deaths occurred: 132 (88.6%) stillbirths and 17 (11.4%) early neonatal deaths. In absolute numbers, the SSA criteria picked up more perinatal deaths compared to the WHO criteria, but the proportion of perinatal deaths was lower in SSA group compared to the WHO (149/465, 32% vs 62/100, 62%). Perinatal mortality was more likely among near misses with antepartum hemorrhage (adjusted odds ratio (aOR) = 4.81; 95% CI = 1.76-13.20), grand multiparous women (aOR = 4.31; 95% confidence interval CI = 1.23-15.25), and women fulfilling any of the WHO near miss criteria (aOR = 4.89; 95% CI = 2.17-10.99).

Conclusion

WHO MNM criteria pick up fewer perinatal deaths, although perinatal mortality occurred in a larger proportion of women fulfilling the WHO MNM criteria compared to the SSA MNM criteria. As women with MNM have increased risk of perinatal deaths (in both definitions), a holistic care addressing the needs of the mother and baby should be considered in management of women with MNM.


Despite the fact that in Ethiopia between 1900 and 2015 a two-third reduction of under-five mortality as part of the Millennium Development Goals was achieved, this was not accomplished for neonatal mortality [1-3]. Perinatal mortality (fetal loss from 28 weeks of gestation onwards) and early neonatal mortality (within 7 days after birth) remained among the highest in sub-Saharan Africa [1-5].

Maternal near miss (MNM) is increasingly applied as an indicator of quality of obstetric care, putting women who barely survived severe complications of pregnancy into focus [6]. The World Health Organization (WHO) suggested MNM criteria that were not always deemed suitable for use in low-income settings in sub-Saharan Africa [7,8], following which adapted “sub-Saharan African (SSA) MNM criteria have been suggested in a recent Delphi consensus study [9].

Although it is clear that complications leading to MNM also contribute to adverse perinatal outcomes, the magnitude of stillbirths and early neonatal deaths among women with MNM is largely unknown in low-resource settings [6,10,11]. In theory, addressing factors that contribute to maternal complications could also reduce adverse perinatal outcomes, and it is therefore important to quantify the association between MNM and perinatal mortality [12-15]. Moreover, although MNM is often considered a ‘great save’, quantifying this association will bring attention to women who, having survived a life-threatening complication themselves, will nonetheless still have to deal with the loss of a child and other adverse maternal outcomes [16-22].

Stillbirth is a silent tragedy, and in general, compared to maternal mortality, audited less frequently in health facilities in low-resource countries [23-26]. It is also possible that audit of perinatal mortality is sometimes forgotten if a woman’s life that was in danger of a life- threatening complication, was saved while her baby’s life was lost. The objective of this study was to assess proportion of stillbirths and early neonatal deaths among a cohort of women with MNM in eastern Ethiopia. Additionally, this paper compares stillbirths and early neonatal deaths among cohorts of women with MNM according to the adapted sub-Saharan African and the original WHO MNM criteria. Finally, we aimed to assess factors associated with adverse perinatal outcomes among women with MNM.

METHODS

Study setting and period

This study was conducted in Hiwot Fana Specialized University Hospital and Jugel Hospital in Harar, Ethiopia, from January 1st, 2016, to April 30th, 2017, as part of a larger study on MNM and pregnancy-related mortality [27]. In brief, during this 16-month period, all women admitted with potentially life-threatening conditions, PLTC (severe postpartum hemorrhage, severe pre-eclampsia, eclampsia, sepsis/severe systemic infection, and ruptured uterus) were identified on a daily basis by trained research assistants and followed until discharge [28]. Upon discharge, women fulfilling the adapted SSA MNM criteria were included [9]. MNM was defined as any woman who had severe obstetric complications according to the SSA MNM criteria.

Data collection

Data on sociodemographic characteristics (maternal age, booking for antenatal care, gravidity, parity, referral status), obstetric conditions (onset of labor, mode of delivery, gestational age at birth, number of fetus), obstetric complications (obstetric hemorrhage, hypertensive disorders, sepsis, anemia, admission to intensive care unit, and receiving of blood), perinatal characteristics (vital status at birth, birthweight, 5th minute Apgar score, admission to the neonatal intensive care unit), and maternal and perinatal vital status at discharge were collected by trained research assistants.

Data processing and analysis

All women admitted to the participating hospitals during the study period constituted the source population. The study population consisted of all women with PLTC. The inclusion criteria were fulfilling MNM according to the sub-Saharan Africa MNM criteria [9]. Women with near misses related to abortion, ectopic pregnancy or were discharged before delivery were excluded from the analysis. Data were entered using EpiData v3.1 (www.epidata.dk) and analyzed using Stata v.13 software (StataCorp Inc, College Station, TX, USA). The main outcome of study was perinatal mortality: stillbirths and early neonatal deaths. Independent variables consist of maternal conditions and complications, institutional factors (referral status, admission dates, booking for antenatal care), and fetal conditions (birthweight, admission to neonatal intensive care unit, Apgar score and number of fetus). Bivariate and multivariate logistic regression were used to determine factors associated with perinatal mortality. Variables with P-value ≤0.25 in the bivariate analysis were retained for multivariate analysis. Significance level was set at P-value of <0.05.

Ethics

This study was conducted as part of a larger prospective study of severe maternal outcomes (maternal near miss and mortality) in eastern Ethiopia [27]. The study protocol was reviewed and approved by the Institutional Health Research Ethics Review Committee of College of Health and Medical Sciences, Haramaya University, Ethiopia (Ref N: C/A/R/D/01/1681/16).

RESULTS

During the study period, of 8002 women admitted to both hospitals during pregnancy and childbirth, 7929 deliveries (including 7404 livebirths and 598 stillbirths) and 1054 women with PLTC were registered. The SSA MNM criteria identified 594 women with MNM while the WHO MNM criteria identified 128. After exclusion of women with near misses related to abortion, ectopic pregnancy, undelivered women, or unknown fetal status at discharge, 465 women with MNM were included in the analysis (Figure 1).

Figure 1.  Flowchart describing the inclusion process in the study. PLTC – potentially life-threatening conditions, SMO – severe maternal outcomes, MNM – maternal near miss.
jogh-10-010413-F1


The mean age of women with MNM (n = 465) was 25.3 (±6.2) years ranging from 15-45. More than half (n = 282; 61%) were referred from other facilities and more than two-third (n = 316; 68%) were not booked for antenatal consultation. One hundred eighty-one (38.9%) women gave birth by cesarean section and hysterectomy was done in 44 (9.5%). With regard to complications, 231 (49.7%) had hypertensive disorders, 157 (33.8%) obstetric hemorrhage, and 109 (23.4%) sepsis. About 141 (30.3%) were anemic (Hb <7gm/dl) and 166 (35.7%) received at least one unit of blood (Table 1). A total of 149 perinatal deaths (132 stillbirths and 17 early neonatal deaths were registered), resulting in a stillbirth and early neonatal mortality rate of 284 and 36.6 per 1000 births respectively. The perinatal mortality rate was 320 per 1000 births in the SSA group and 620 per 1000 births in the WHO MNM group. The proportion of still births was 244 and 75 per 1000 births among women with PLTC and all women admitted to the hospital during the study period respectively. Thus, proportion of stillbirths per 1000 births was highest in the cohort of women with MNM (n=284).

Table 1.  Sociodemographic characteristics of study participants with and without adverse perinatal outcomes
Variables Adverse perinatal outcomes
Yes (n = 149), % No (n = 316), %
Maternal characteristics:
Age (years) <20 15(10.3)* 50 (15.8)
20-35 104 (71.2) 232 (73.4)
>35 27 (18.5) 34 (10.8)
Referred from other facility No 47 (32.0)+ 133(42.2)‡
Yes 100(68.0) 182(57.8)
Received antenatal care: Yes§ 47 (31.5) 102 (32.3)
No 102 (68.5) 214 (67.7)
Gravida 1 34 (23.1)2 137 (43.6)2
≥2 113 (76.9) 177 (56.4)
Mode of delivery Vaginal 79 (53.0) 205 (64.9)
Cesarean‖ 70 (47) 111 (35.1)
Obstetric complications:
Obstetric hemorrhage Yes 85 (57.0) 72 (22.8)
No 64 (43.0) 244 (77.2)
Hypertensive disorders Yes 47 (31.5) 184 (58.2)
No 102 (68.5) 132 (41.8)
Sepsis Yes 19 (12.8) 90 (28.5)
No 130 (87.2) 226 (71.5)
Anemia Yes 63 (42.3) 78 (24.7)
No 86 (57.7) 238 (75.3)
Received blood Yes 81 (54.4) 85 (26.9)
No 68 (45.6) 231 (73.1)

*Missing information (n = 3).

+Missing information (n = 2).

‡Missing information (n = 1).

§At least one antenatal care.

‖Includes laparotomy.



Compared to the WHO MNM criteria, the SSA criteria picked up more perinatal deaths (149 vs 62) while the proportion of perinatal deaths was higher in the WHO group (62% vs 32%). Additionally, admission to neonatal intensive care unit, stillbirths and early neonatal deaths were more common among women in the WHO criteria compared to the SSA MNM group. Birthweight and 5th minute Apgar score did not differ between the two groups (Table 2).

Table 2.  Fetal outcomes among women with and without the WHO MNM criteria
Variables Fulfilled WHO MNM criteria Total
Yes* (n = 100, %) No (n = 365, %) P-value†
Fetal vital status at birth Alive 42 (42.0) 291 (79.7) 333 (71.6) <0.001
Stillbirths 58 (58.0) 74 (20.3) 132 (28.4)
Birth weight (grams) <1500 8 (8.0) 19 (5.2) 27 (5.8) 0.476
1500-2400 16 (16.0) 70 (19.2) 86 (18.5)
≥2500 76 (76.0) 276 (75.6) 352 (75.7)
5th minute Apgar score <7 4 (4.0) 17 (4.7) 21 (4.5) 0.779
≥7 96 (96.0) 348 (95.3) 444 (95.5)
Admitted to neonatal intensive care unit No 96 (96.0) 325 (89.0) 421 (90.5) 0.035
Yes 4 (4.0) 40 (11.0) 44 (9.5)
Neonatal outcome at discharge Alive 38 (38.0) 278 (76.2) 316 (68.0) <0.001
Dead 62 (62.0) 87 (23.8) 149 (32.0)

WHO – World Health Organization, MNM – maternal near miss

*Fulfil the sub-Saharan Africa criteria.

†χ2 test.



Factors associated with perinatal mortality

Factors associated with perinatal mortality in the study participants (n = 465) are summarized in Table 3. Perinatal death was more likely among women who had antepartum hemorrhage (aOR 4.81; 95% CI = 1.76-13.20), grand multiparous women (aOR 4.31; 95% CI = 1.23-15.25), and women who fulfilled WHO MNM criteria (aOR 4.89; 95% CI = 2.17-10.99). No statistically significant association was observed between perinatal mortality and referral status, gestational age, and birthweight (Table 3).

Table 3.  Factors associated with perinatal mortality among women with MNM in eastern Ethiopia
Variables Perinatal deaths
No cOR aOR
Ante partum hemorrhage No 308 Ref Ref
Yes 157 3.93 (1.77-8.74) 4.81 (1.76-13.20)
Parity* 0 126 Ref Ref
1-4 208 0.93 (0.56-1.55)
≥5 127 3.08 (1.81-5.24) 4.31 (1.23-15.25)
Referred from other facilities† No 180 Ref
Yes 282 1.55 (1.03-2.35)
Gestational age Pre-term Term(≥37weeks) 147 Ref
318 0.45(.0.30-0.68)
Birthweight (gram) ≥2500 352 Ref
1500-2400 86 1.30 (0.79-2.15)
<1500 27 8.94 (3.51-22.82)
Fulfilled WHO MNM criteria No 365 Ref Ref
Yes 100 5.21 (3.26-8.34) 4.89 (2.17-10.99)

cOR – crude odds ratio, aOR – adjusted odds ratio, Ref – reference group, WHO – World Health Organization, MNM – maternal near miss

*Missing information (n = 4).

Missing information (n = 3).



DISCUSSION

Our findings indicate the high burden of adverse perinatal outcomes (stillbirths and neonatal deaths) among women with MNM. More than one in three of women with MNM went home with a dead baby. This highlights the importance of close monitoring of fetal conditions in those women. Adverse perinatal outcomes were more likely among grand multiparous women and women with antepartum hemorrhage. Given the fact that the WHO MNM tool is based on more severe clinical criteria identifying advanced disease with organ dysfunction, it is self-evident that perinatal outcomes in this group were worse (62 per 1000 births) compared to the SSA MNM group (32 per 1000 births).

The stillbirth rate of 284 per 1000 births is unacceptably high. This is almost twice as high as findings from a general population in public health facilities in southern Ethiopia (n=183) and more than ten times higher than the average stillbirth rate (25 to 31 per 1000 births) in the general population in low-income settings of southern Africa and Asia [29,30].

The stillbirth rate (284) in our study was found to be higher than in a cohort of women with MNM in Brazil (195 per 1000 births) [31]. The fact that stillbirths in our SSA MNM cohort were even higher than in the Brazilian cohort defined by the WHO MNM criteria shows the high burden of stillbirths in our setting, which may be related to differences in the quality of intrapartum care.

Although the proportion of stillbirths was higher (58%) among women fulfilling the WHO MNM criteria, the rate in the SSA group (28.4%) indicates that women with MNM according to SSA criteria are still in an advanced stage of disease. The common pathways to severe maternal and perinatal outcomes are potential areas of intervention for addressing the needs of both women and newborns [6]. Factors associated with adverse perinatal outcomes in this study (antepartum hemorrhage, lack of prenatal care) were comparable with findings from previous studies in Uganda [32], Nigeria [33], the Gambia [34], and Brazil [35]. We found that perinatal deaths were higher in absolute numbers among women in the SSA MNM group. This highlights the importance of considering the use of the SSA MNM criteria for more robust audit if better maternal and perinatal outcomes are to be achieved [27]. The strength of this study is the use of prospective case identification and large sample size. Some limitations should also be considered. First, this study was not population-based and MNM women with adverse perinatal outcomes who could not reach hospital are missed. Second, follow-up was limited to only seven days or until discharge. Some perinatal deaths and MNM events may have occurred after discharge.

CONCLUSIONS

Behind the rescued life of a woman with MNM, often lies the silent tragedy of stillbirths and neonatal deaths [23-26]. Although these women survived the life-threatening complications, they have to be supported to deal with loss of baby since burden of stillbirths and early neonatal deaths is more common in women with MNM. Compared to the WHO MNM criteria, the SSA MNM criteria is a better choice for conducting robust perinatal audit for improving perinatal care and survival. The high stillbirth rate in this cohort highlights the importance conducting a thorough audit of perinatal deaths to identify opportunities to improve these outcomes in the future.

Acknowledgments

We thank Nuffic for financial support of the study. We want to thank all the research assistants and hospital administrators who were helpful during the study.

Notes

[1] Funding: This study was funded by the Netherlands Organization for International Cooperation in Higher Education (Nuffic) as part of a PhD study to AKT. The organization has no role in the design of the study, collection, analysis or interpretation of data or the decision to submit for publication.

[2] Authorship contributions: AKT, SS, and JZ conceived the study. AKT analyzed the data. AKT drafted the manuscript, which was revised by SS, JvR, JZ, JS, TvdA. Overall supervision: SS, JvR, JZ, JS, TvdA. All authors approved the final version for submission.

[3] Competing interests: The authors completed the ICMJE Unified Competing Interest form (available upon request from the corresponding author), and declare no conflicts of interest.

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