Factors Associated with Neonatal Mortality at Kyeshero Hospital, Goma, North Kivu, DRC

Article Information

Endanda Zawadi E1,4, Imani musimwa P2, Tshivwadi Tshilomba A3, Tongota NJ4, Kambale Wasukundi J4, Kyembwa Mwindulwa L1, Buhoro Baabo G1, Mumbere Hangi S1, Musafiri Mugisho A5, Masumbuko mungo B1, Kabamba Nzaji M6, Mutombo Malangu A7, Bitwe Mihanda R1, Luboya Numbi Oscar7

1Department of Pediatrics, Faculty of Medicine, University of Goma, Goma , Democratic Republic of the Congo

2Department of gynecology, Faculty of Medicine, University of Goma, Goma, Democratic Republic of the Congo

3Departement of oncology, Faculty of Medecine, University Felix Houphouet Boigny, Abidjan, Ivory Cost

4Kyeshero Hospital, Goma, Democratic Republic of the Congo

5School of Public Health, University of Kisumu, Kenya

6Department of Public Health, Faculty of Medicine, University of Kamina, Kamina, Democratic Republic of  the Congo

7Department of Pediatrics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo

*Corresponding Author: Michel Kabamba Nzaji, Department of Public Health, Faculty of Medicine, University of Kamina, Kamina, Democratic Republic of the Congo.

Received: 12 April 2023; Accepted: 16 May 2023; Published: 30 May 2023

Citation:

Endanda Zawadi E, Imani musimwa P, Tshivwadi Tshilomba A, Tongota NJ, Kambale Wasukundi J, Kyembwa Mwindulwa L, Buhoro Baabo G, Mumbere Hangi S, Musafiri Mugisho A, Masumbuko Mungo B, Kabamba Nzaji M, Mutombo Malangu A, Bitwe Mihanda R, Luboya Numbi Oscar. Factors Associated with Neonatal Mortality at Kyeshero Hospital, Goma, North Kivu, DRC. Journal of Pediatrics, Perinatology and Child Health. 7 (2023): 99-106.

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Abstract

Background: The neonatal mortality rate is still significant public health problem in Sub-Saharan Africa countries and an indicator of the quality of prenatal and perinatal care. This study aimed to determine the neonatal intra-hospital neonatal mortality rate and the maternal and neonatal risk factors associated with neonatal mortality in Kyeshero Hospital.

Methods: This research was a cross-sectional analytical study, which took place over a period of 12 months, from January 1 to December 31, 2021, at Kyeshero Hospital in Goma, Eastern Democratic Republic of Congo.

Results: The Intra-hospital neonatal mortality rate was 17.0 %. The multivariate analysis showed various risk factors associated with newborns that low birth weight <2500gr ORa=4.11 (2.17-7.77), Presence of cyanosis ORa=3.88 (1.97-7.65) , absence of reactivity ORa=20.07 (8.07-49.55), and neonatal infection ORa=4.78 (2.47-9.22) are real predictor factors of neonatal mortality.

Conclusion: This study noted that neonatal mortality was influenced by neonatal factors. Proper care of the newborn should improve neonatal vital prognosis. The study of preventable causes of death and factors that lead to early neonatal death is fundamental to reduce infant mortality rate in the world.

Keywords

Neonatal mortality; Risk factor; Goma

Neonatal mortality articles; Risk factor articles; Goma articles

Article Details

1. Introduction

The first 28 days of life is an extremely likely time for a newborn to make many physiological adjustments necessary for life outside the womb, making this the most dangerous time of life [1]. Newborns in need of serious medical attention are admitted to the neonatal intensive care unit, which incorporates innovative technology and trained staff to effectively provide specialized care to newborns [2]. Neonatal mortality is an indicator of a country's demographic, biological, and socioeconomic conditions as well as the health system, public health, and population growth rate [3]. Although the neonatal mortality rate has decreased worldwide, it is slower than the under-5 mortality rate and remains unacceptably high at 37 per 1000 live births [4]. Globally, approximately 7,000 babies die every day; Most of these deaths occur within the first week and nearly 2.6 million babies die within the first month of life [5].

Approximately 78% of these neonatal deaths occur in developing countries, particularly in South Asia and sub-Saharan Africa [6], which account for 39% of all neonatal deaths worldwide and are among the top 10 countries with the highest neonatal mortality rate [7]. In Sub-Saharan Africa alone 1.2 million newborns died every year equivalent to 13 000 deaths per days or almost nine death every minute, 50% of neonatal deaths occur in just five countries: Nigeria, Democratic, Republic of Congo, Ethiopia, Tanzania and Uganda [8]. Majority of neonatal deaths in this party of Africa occur at home, in rural communities, among the poor and poorest,less educated,and in war regions [9-11]. Also causes and risk factors of neonatal death vary by country with the availability in relation with quality of health care [12]. Democratic Republic of Congo, ranks second among Africa countries with higher neonatal mortality rate more than 28 per 1000 live births [13].

This situation shows that neonatal mortality remains a public health problem in many countries. In order to accelerate the achievement of Millennium Development Goals (MDGs) 4 and 5, several countries, including the DRC, have implemented strategies to substantially reduce neonatal mortality. To target actions, an understanding of the causal factors of neonatal mortality is required in the context of the deaths occurring. This study aims to determine the neonatal intra-hospital neonatal mortality rate and the maternal and neonatal risk factors associated with neonatal mortality in Kyeshero Hospital. The hospital is located in Goma, the North Kivu province of Eastern Democratic Republic of Congo.

2. Methods

2.1 Study design, setting, and period

We conducted a cross-sectional analytical study, which took place over a period of 12 months, from January 1 to December 31, 2021, at Kyeshero Hospital in Goma, Eastern Democratic Republic of Congo, which is one of the reference health facilities child health care in this region.

2.2 Study population, sample size and inclusion criteria

All neonates who were admitted to the neonatal intensive care unit and registered as dead and alive during the first 28 days of the last one-year period (2021). The sample size was calculated based on a formula for cross-sectional study [n≥ Z1-α2 p(1 − p)/d2], in which Z was the confidence interval at 95%, d was the margin of error of 5%, and p was the proportion of neonatal death at 50.0%. Therefore, the minimum sample size for this study was 484 participants. The simple random probability selection method was used as the sampling method. All newborns aged 0 to 28 days, hospitalized and deceased in the neonatology unit of Kyeshero Hospital, during the study period, and having a complete medical file were included. Were excluded, all newborns who died on arrival in the neonatology department, all malformed newborns and all newborns whose records were deemed unusable.

2.3 Data collection

The source of data for this study was the neonatology registers at Kyeshero Hospital which consisted of new-born information recorded at the characteristics of the newborn: the gestational age at birth, the age of the newborn at admission, the sex, the birth weight, the notion of crying, the APGAR score at the 5th and the 10th minute, the notion of resuscitation, the reason for hospitalization, the clinical signs on admission, the diagnosis, the treatment received and mode of feeding, the duration of hospitalization, the mode of discharge, the age and probable cause of death. But also, factors related to the mother: age, parity, origin, number of prenatal consultations, pathological pregnancy history, notion of multiple pregnancy, premature rupture of membranes, maternal fever 48 hours before delivery, antenatal treatment received, place and mode of delivery.

2.4 Statistical analysis

Variables were described as absolute frequencies and percentages. The determinants of neonatal mortality were evaluated by univariate and multivaraite analysis were evaluated by univariate and multivariate analyses. The associations between independent variables and the primary outcomes (neonatal mortality) were tested using t-test or Chi-square test as appropriate. The results of the multivariate analysis were presented as odds ratio (OR) with standard error (SE) and 95% confidence interval (95% CI). A step-by-step, bottom-up Wald analysis was performed to define the variables to be included in the final logistic regression model, according to the results of the univariate models and was complemented by analysis of the model’s predictive power using the Receiver Operating Characteristic curve (ROC).

2.5 Ethical issues

Authorization to carry out the study, and ethical clearance were obtained from the hospital authorities and the hospital ethics committee. The data were kept confidential.

3. Results

3.1 Neonatal mortality rate

During our study period, among 501 newborns was admitted in the neonatology unit; 85 newborns was died. The neonatal intra-hospital neonatal mortality rate was 17.0% (Table 1).

Characteristics of the Newborn

Effective

Percentage

Post natal age in days

0 - 6 days

461

92

7 - 28 days

40

8

Sex

Feminine

205

40.9

Male

296

59.1

Birth Weight

2500 - 4000g

300

59.9

lower 2500 g

165

32.9

Greater than 4000g

36

7.2

Type of Pregnancy

Twin

33

6.6

Monofetal

467

93.2

Multiple greater than 2

1

0.2

APGAR score at the fifth minute

Less than 7

104

20.8

Greater than or equal to 7

397

79.2

Presentation of the fetus

Cephalic

437

87.2

Headquarters

55

11

transverse

9

1.8

Table 1: Descriptions of socio-demographic characteristics of newborns.

The study of the epidemiological characteristics of the newborns revealed that 92% of the newborns were aged between 0-6 days, the male sex was more represented with 59.1% versus 40.9 for the female sex and in this with regard to weight, the 2500 to 4000 g bracket was more represented with 59.9% (Table 2).

Characteristics of the mother

Effective

Percentage

Under 18

21

4.2

greater than or equal to 18 years old

480

95.8

Parity

Grand Multipara

79

15.8

Multipara

122

24.4

Pauci parries

154

30.7

Primiparous

146

29.1

Gestational age

32 - 34 weeks + 6 days

59

11.8

35 - 36 weeks + 6 days

56

11.2

37 - 40 weeks

309

61.7

Less than 32 SA

36

7.2

Greater than 40 SA

41

8.2

Have followed the ANC

No

17

3.4

Yes

484

96.6

Number of ANC followed

Less than or equal to 3

330

68.2

Greater than 3

154

31.8

Mode of delivery

caesarean section

209

41.7

low way

292

58.3

Place of birth

Outside the health facility

5

1

Sanitary structure

496

99

Table 2: Description of the maternal characteristics of newborns

The maternal age group greater than or equal to 18 years was more represented with 95.5%. The gestational age range from 37 – 40 SA was more represented with 61.7%, the number of CPN follow-up less than or equal to 3 was more represented with 68.2% versus 31.8 for the number greater than 3 The vaginal mode of delivery was the most practiced for these parturients, i.e. 58.3% versus 41.7% vaginally (Table 3). These patients were 30.7% parous pauci. For the place of delivery, 99% of these parturients were from Kyeshero hospital.

Characteristics of the newborn

Mortality

GOLD OR [95% CI]

p

Yes

No

Age in days

0-6

80(17.4)

381(82.6)

1.47 [0.56-3.87]

0.43

46935

5(12.5)

35(87.5)

Sex

Feminine

34(16.6)

171(83.4)

0.96 [0.59-1.54]

0.85

Male

51(17.2)

245(82.8)

Low birth weight

Yes

58(35.2)

107(64.8)

6.20 [3.74-10.30]

≤0.0001

No

27(8.0)

309(92.0)

Macrosomia

Yes

4(11.1)

32(88.9)

0.59 [0.20-1.72]

0.33

No

81(17.4)

384(82.6)

Intake method

Referred or brought by parents

30(25.9)

86(74.1)

2.09 [1.26-3.47]

0.004

Self-hospitalization

55(14.3)

330(85.7)

APGAR score at the fifth minute

< 7

40(38.5)

64(61.5)

4.89 [2.96-8.08]

≤0.0001

≥ 7

45(11.3)

352(88.7)

Presence of respiratory distress

Yes

70(27.1)

188(72.9)

5.66 [3.14-10.21]

≤0.0001

No

15(6.2)

228(93.8)

Presence of pallor

Yes

2(18.2)

9(81.8)

1.09 [0.23-5.14]

0.91

No

83(16.9)

407(83.1)

Presentation of the fetus

Seat or transverse

18(28.1)

46(71.9)

2.16 [1.18-3.95]

0.011

Cephalic

67(15.3)

370(84.7)

Presence of jaundice

Yes

3(16.7)

15(83.3)

0.98 [0.28-3.46]

0.97

No

82(17.0)

401(83.0)

Presence of cyanosis

Yes

50(47.6)

55(52.4)

9.38 [5.59-15.72]

≤0.0001

No

35(8.8)

361(91.2)

Presence of sepsis

Yes

0(0.0)

10(100.0)

0.15

No

85(17.3)

406(82.7)

Presence of neonatal infection

Yes

41(27.2)

306(87.4)

≤ 0.0001

No

44(12.6)

110(72.8)

Sucking-swallowing

Absent

24(68.6)

11(31.4)

14.49 [6.76-31.06]

≤ 0.0001

Present

61(13.1)

405(86.9)

Reactivity

Absent

41(83.7)

8(16.3)

47.52 [20.95-107.78]

≤ 0.0001

Present

44(9.7)

408(90.3)

Type of pregnancy

Monofetal

6(17.6)

28(82.4)

1.05 [0.42-2.62]

0.91

Multifetal

79(16.9)

388(83.1)

Table 3: Description of the characteristics of newcomers associated with neonatal mortality

Statistical analyzes of newborn characteristics associated with mortality with a statistically significant association were found in low birth weight newborns (p =≤0.0001) with an Apgar score of less than 7 (p= ≤0.0001 ), with presence of respiratory distress (p ≤0.0001) with presence of cyanosis (p =≤0.0001), neonatal infection (p= ≤0.0001), absence of sucking – swallowing (p= ≤0.0001) and absence responsiveness in neonates (p =≤0.0001).

It appears from this Table 4 that the non-followed of prenatal consultation, the premature rupture of the membranes, the delivery at home were associated with the risk of neonatal mortality without this association being statistically significant.

Characteristics of the mother

Mortality

GOLD

p

Yes

No

[95% CI]

Age in years

<18

2(9.5)

19(90.5)

0.50 [0.12-2.20]

0.35

≥18

83(17.3)

397(82.7)

Parity

Primiparous

19(13.0)

127(87.0)

0.66[0.38-1.14]

0.13

Multipara

66(18.6)

289(81.4)

Prenatal consultation followed

No

4(23.5)

13(76.5)

1.53[0.49-4.81]

0.46

Yes

81(16.7)

403(83.3)

Premature rupture of membranes

Yes

25(19.1)

106(80.9)

1.22[0.73-2.04]

0.45

No

60(16.2)

310(83.8)

Delivery mode

caesarean section

32(15.3)

177(84.7)

0.82[0.51-1.32]

0.4

low way

53(18.2)

239(81.8)

Place of birth

Residence

1(20.0)

4(80.0)

1.23[0.14-11.11]

0.86

Hospital

84(16.9)

412(83.1)

Perpartal fever

Yes

6(10.7)

50(89.3)

0.56[0.23-1.34]

0.19

No

79(17.8)

366(82.2)

Appearance of amniotic fluid

Pathologies

31(15.0)

175(85.0)

0.79[0.49-1.28]

0.34

Clear

54(18.3)

241(81.7_

Table 4: Maternal characteristics associated with neonatal mortality.

Table 5 show that low birth weight <2500gr aOR=4.11 (2.17-7.77), presence of cyanosis aOR=3.88 (1.97-7.65), absence of reactivity aOR=20.07 (8.07-49.55), and neonatal infection aOR=4.78 (2.47-9.22) were significantly associated with neonatal mortality.

Factors explaining neonatal mortality

B

ES

Wald

P

Exp(B)

CI for Exp(B) 95%

Inferior

Superior

Low birth weight (yes vs. no)

1.41

0.33

18.86

0

4.11

2.17

7.77

Presence of cyanosis (yes vs. no)

1.36

0.35

15.37

0

3.88

1.97

7.65

Reactivity (absent vs present)

3

0.47

41.37

0

20.07

8.07

49.55

Neonatal infection (yes vs. no)

1.56

0.34

21.69

0

4.78

2.47

9.22

Constant

-3.56

0.54

44.24

0

0.028

Table 5: Logistic regression.

Table 5 show that low birth weight <2500gr  aOR=4.11 (2.17-7.77), presence of cyanosis aOR=3.88 (1.97-7.65) , absence of reactivity aOR=20.07 (8.07-49.55), and neonatal infection aOR=4.78 (2.47-9.22) were significantly associated with neonatal mortality

The neonatal mortality prediction model is as follows:

P= (Y= Neonatal mortality /X=xi)=

4. Discussion

The child mortality rate is considered the best proxy indicator of general population health and the level of socioeconomic development. The child mortality rate is also a useful marker of overall development and a Millennium Development Goal (MDG) indicator [14].

During our study period, the in-hospital neonatal mortality rate was 17.0%. However, this contrasts with the higher rates noted by Mashako et al. [28] who conducted a study at the neonatal intensive care unit of the North Kivu Provincial Hospital in Goma, eastern Democratic Republic of Congo (19.7%). The decrease of neonatal mortality rate in Goma may be linked to differences in the quality of health care governance including early intervention which includes the availability, accessibility and affordability of health care systems for children. Quality of care plays an important role in improving neonatal outcomes, and the high levels of neonatal mortality in many resource-limited countries can, in part, be attributed to poor quality of care [15,16]. Effective implementation of quality improvement is possible in low income settings [17], with appropriate strategies including the identification of quality gaps, followed by the development of action plans (and their implementation) to overcome barriers [15].

However, the result was lower than studies in Ghana at 20.2% [18]; Mizan Tepi Teaching Hospital, South West Ethiopia, at 22.8% [19]; Hiwot Fana University Specialty Hospital, Eastern Ethiopia, at 14.3% [20]; and Gondar Referral Hospital in northwestern Ethiopia at 23.1% [21]; University Clinics of Lubumbashi at 36.9% [22] and general referral hospital in Kamina at 25% [23]. Our prevalence of neonatal mortality was higher than in studies conducted in Somali region, Ethiopia, at 5.7% [24]; in Kolwezi, DRC, at 18.8% % [25]; and in Mekelle, Ethiopia, at 6.6% [26]. The discrepancy could be due to the presence of socio-cultural and socio-economic differences between Ethiopian regions. This variation could also be due to variation in sample sizes. Another possible justification may be the difference in the use of health services, including delivery in health facilities by skilled care providers and seeking care for sick newborns, variation in health facility configuration (equipment available and trained people) and economic disparities among study participants [27].

This study found that newborns with a birth weight were 4.11 times higher risk of death than those with a normal or higher birth weight (ORa=4.11; CI 95%[2.17-7.77]). The possible justification is that low birth weight increases children's susceptibility to infection and lowers their immune system and other body defense mechanisms, which control newborns' exposure to disease. As a result, neonatal survival is reduced [28]. Other possible explanations could also be due to low birth weight that newborns are expected to suffer from hypothermia, infection and poor immunological function, which increases the risk of neonatal death [29,30].

In the final logistic regression model of this study, we found neonatal infection was statistically associated with neonatal mortality. Thus, the risks of neonatal mortality were almost five times higher in newborns who had an early neonatal infection than in those who did not(ORa=4.78; CI 95%[2.47-9.22]). This result is comparable with previous hospital studies conducted in the health zone of Kenge in the DRC [31] and in Eastern Ethiopia [32]. The possible explanation could be justified by newborns who had an infection in the neonatal period who risk dying during the first month of life because their immunity can be significantly affected by the course of the disease.

However, in a multivariate model, the association between cyanosis and neonatal mortality was also noted (ORa=3.88; CI 95%[1.97-7.65]). For Simões et al. [33], the presence of cyanosis, gestational age, cause of death, first- and/or fifth-minute Apgar < 6, and pH value were associated with death in the first week of life [33]. Neonatal cyanosis is always a sign of serious pathological processes and may involve diverse organs and impose a significant diagnostic and therapeutic challenge.

Limitation of Study

The limitation of this study was it might not indicate a cause-effect relationship because the study design was cross sectional. Even though this study investigates the most important determinants of neonatal mortality, our study encountered limitations like missing information both on mother and neonates. For instance, economic status and contextual were not assessed.

Conclusion

The intra-hospital frequency of neonatal deaths is 17.0% was justified by four main causes including: Low birth weight, neonatal infection, presence of cyanosis and absent reactivity. Neonatal mortality was influenced by neonatal factors. Proper care of the newborn should improve neonatal vital prognosis. The study of preventable causes of death and factors that lead to early neonatal death is fundamental to reduce infant mortality rate in the world.

The results of the current study could be used to determine priorities, plan, evaluate services and improve newborn health care.

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