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Lateef MA, Kuupiel D, Mchunu GG, Pillay JD. Utilization of Antenatal Care and Skilled Birth Delivery Services in Sub-Saharan Africa: A Systematic Scoping Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:440. [PMID: 38673351 PMCID: PMC11050659 DOI: 10.3390/ijerph21040440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/15/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024]
Abstract
Daily, the number of women who die around the world reaches an average of 800; these deaths are a result of obstetric complications in pregnancy and childbirth, and 99% of these deaths occur in low- and middle-income countries. This review probes the use of antenatal care (ANC) and skilled birth delivery (SBD) services in sub-Saharan Africa (SSA) and highlights research gaps using Arksey and O'Malley's methodological approach. The screening of abstracts and full text was carried out by two independent authors who ensured the eligibility of data extraction from the included articles. An exploration of the data was undertaken with descriptive analyses. In total, 350 potentially eligible articles were screened, and 137 studies were included for data extraction and analysis. From the 137 included studies, the majority were from Ethiopia (n = 40, 29.2%), followed by Nigeria (n = 30, 21.9%). Most of the studies were published between 2019 and 2023 (n = 84, 61%). Significant trends and challenges with ANC and SBD services emerged from the studies. It is revealed that there are wide gaps in the utilization of ANC and SBD services. Policy attention, intervention strategies to improve access, resources, rural-urban disparity, and women's literacy are recommended to improve the utilization of ANC and SBD services in SSA countries.
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Affiliation(s)
- Monsurat A. Lateef
- Faculty of Health Sciences, Durban University of Technology, Durban 4001, South Africa; (D.K.); (G.G.M.); (J.D.P.)
| | - Desmond Kuupiel
- Faculty of Health Sciences, Durban University of Technology, Durban 4001, South Africa; (D.K.); (G.G.M.); (J.D.P.)
- Discipline of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Gugu G. Mchunu
- Faculty of Health Sciences, Durban University of Technology, Durban 4001, South Africa; (D.K.); (G.G.M.); (J.D.P.)
| | - Julian D. Pillay
- Faculty of Health Sciences, Durban University of Technology, Durban 4001, South Africa; (D.K.); (G.G.M.); (J.D.P.)
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Tumwizere G, K Mbonye M, Ndugga P. Determinants of late antenatal care attendance among high parity women in Uganda: analysis of the 2016 Uganda demographic and health survey. BMC Pregnancy Childbirth 2024; 24:32. [PMID: 38183021 PMCID: PMC10768297 DOI: 10.1186/s12884-023-06214-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 12/19/2023] [Indexed: 01/07/2024] Open
Abstract
BACKGROUND Timely and adequate Antenatal Care (ANC) effectively prevents adverse pregnancy outcomes and is crucial for decreasing maternal and neonatal mortality. High-parity women (5 + children) are at higher risk of maternal mortality. Limited information on the late timing of ANC among this risky group continues to hamper Uganda's efforts to reduce maternal mortality ratios and improve infant and child survival. This study aimed to determine factors associated with attendance of the first ANC after 12 weeks of gestation among high-parity women in Uganda. METHODS This study was based on nationally representative data from the 2016 Uganda Demographic and Health Survey. The study sample comprised 5,266 women (aged 15-49) with five or more children. A complementary log-log regression model was used to identify factors associated with late ANC attendance among high-parity women in Uganda. RESULTS Our findings showed that 73% of high parity women delayed seeking their first ANC visit. Late ANC attendance among high-parity women was associated with distance to the health facility, living with a partner, partner's education, delivery in a health facility, and Desire for more children. Women who did not find the distance to the health facility when going for medical help to be a big problem had increased odds of attending ANC late compared to women who found distance a big problem (AOR = 1.113, CI: 1.004-1.234), women not living with partners (AOR = 1.196, 95% CI = 1.045-1.370) having had last delivery in a health facility (AOR = 0.812, 95% CI = 0.709-0.931), and women who desired to have another child (AOR = 0.887, 95% CI = 0.793-0.993) had increased odds compared to their counterparts. CONCLUSIONS To increase mothers' timely attendance and improve maternal survival among high-parity women in Uganda, programs could promote and strengthen health facility delivery and integrate family planning with other services such as ANC and postnatal care education to enable women to seek antenatal care within the recommended first trimester. This study calls for increased support for programs for education, sensitization, and advocacy for health facility-based deliveries. This could be done through strengthened support for VHT and community engagement activities.
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Affiliation(s)
- Godfrey Tumwizere
- School of Statistics and Planning, Makerere University, Kampala, Uganda.
- Action 4 Health Uganda, Kampala, Uganda.
| | - Martin K Mbonye
- School of Statistics and Planning, Makerere University, Kampala, Uganda
| | - Patricia Ndugga
- School of Statistics and Planning, Makerere University, Kampala, Uganda
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Stanikzai MH, Tawfiq E, Jafari M, Wasiq AW, Seddiq MK, Currie S, Sayam H, Baray AH, Saeedzai SA. Contents of antenatal care services in Afghanistan: findings from the national health survey 2018. BMC Public Health 2023; 23:2469. [PMID: 38082286 PMCID: PMC10712111 DOI: 10.1186/s12889-023-17411-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 12/05/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Maternal and newborn mortality is a public health concern in low- and middle-income countries (LMICs), including Afghanistan, where the evolving socio-political circumstances have added new complexities to healthcare service delivery. Birth outcomes for both pregnant women and their newborns are improved if women receive benefits of quality antenatal care (ANC). OBJECTIVES This study aimed to assess the contents of ANC services and identify predictors of utilization of services by pregnant women during ANC visits to health facilities in Afghanistan. METHODS In this cross-sectional study, we used data from the Afghanistan Health Survey 2018 (AHS2018). We included a total of 6,627 ever-married women, aged 14-49 years, who had given birth in the past 2 years or were pregnant at the time of survey and had consulted a health worker for ANC services in a health facility. The outcome was defined as 1-4 services and 5-8 services that a pregnant woman received during an ANC visit. The services were (i) taking a pregnant woman's blood pressure, (ii) weighing her, (iii) testing her blood, (iv) testing her urine, (v) providing advice on nutrition, (vi) advising about complicated pregnancy, (vii) advising about the availability of health services, and (viii) giving her at least one dose of Tetanus Toxoid (TT) vaccine. The binary outcome (1-4 services versus 5-8 services) was used in a multivariable logistic regression model. RESULTS Of all 6,627 women, 31.4% (2,083) received 5-8 services during ANC visits. Only 1.3% (86) received all 8 services, with 98.7% (6,541) receiving between 1 and 7 services, and 71.6% (4,745) women had their blood pressure measured during ANC visits. The likelihood (adOR = Adjusted Odds Ratio) of receiving 5-8 services was higher in women who could read and write (adOR = 1.33: 1.15-1.54), in women whose husbands could read and write (adOR = 1.14: 1.00-1.28), in primipara women (adOR = 1.42: 1.02-1.98), in women who knew one danger sign (adOR = 5.38: 4.50-6.45), those who knew 2 danger signs (adOR = 8.51: 7.12-10.19) and those who knew ≥ 3 danger signs (adOR = 13.19: 10.67-16.29) of complicated pregnancy, and in women who had almost daily access to TV (adOR = 1.16: 1.01-1.33). However, the likelihood of receiving 5-8 services was lower in women who used private clinics (adOR = 0.64: 0.55-0.74) and who received services from nurses (adOR = 0.27 (0.08-0.88). CONCLUSION Our findings have the potential to influence the design and implementation of ANC services of health interventions to improve the delivery of services to pregnant women during ANC visits.
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Affiliation(s)
- Muhammad Haroon Stanikzai
- Department of Public Health, Faculty of Medicine, Kandahar University, District # 10, Kandahar, 3801, Afghanistan.
| | - Essa Tawfiq
- The Kirby Institute, UNSW Sydney, Sydney, Australia
| | | | - Abdul Wahed Wasiq
- Department of Internal Medicine, Faculty of Medicine, Kandahar University, Kandahar, Afghanistan
| | | | - Sheena Currie
- Jhpiego, 1615 Thames Street, Baltimore, MD, 21231, USA
| | - Hadia Sayam
- Department of Para-clinic, Faculty of Medicine, Malalay Institute of Higher Education, Kandahar, Afghanistan
| | - Ahmad Haroon Baray
- Department of Public Health, Faculty of Medicine, Kandahar University, District # 10, Kandahar, 3801, Afghanistan
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Uwimana G, Elhoumed M, Gebremedhin MA, Qi Q, Azalati MM, Wang L, Zeng L. Association between adequacy of antenatal care and neonatal outcomes in Rwanda: a cross-sectional study design using the Rwanda demographic and health surveys. BMC Health Serv Res 2023; 23:1379. [PMID: 38066497 PMCID: PMC10704762 DOI: 10.1186/s12913-023-10345-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/18/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Maternal and neonatal health services are life-saving interventions for neonatal health outcomes. As Rwanda endeavors to accomplish sustainable development goals, adequate ANC is essential to lessen of neonatal mortality. The utilization of ANC continues to be inadequate and high neonatal mortality rate persevere in Rwanda. Understanding the direct and indirect factors that affect newborn health outcomes is necessary for well-targeted interventions. However, few studies had been conducted in Rwanda to evaluate the importance of ANC in improving neonatal health. This study therefore assessed the association between ANC and neonatal outcomes. METHODS The Demographic and Health Surveys (DHS) are household surveys that are cross-sectional, nationally representative, and used to collect data on population, health, and nutrition. Data from the 2010,2015 and 2020 Rwanda Demographic and Health Surveys (RDHS) were used. The study involved 17,747 women between the ages of 15 and 49 who had a single live birth and at least one ANC visit in five years prior to each survey. Bivariate and multivariable logistic regression, a survey adjusted for clusters at multiple level, and the estimation of adjusted odds ratios (aOR) and 95% confidence intervals were used to evaluate the relationship between the outcome and independent variables. RESULTS Out of 17,747 women ;7638(42.91%) of the mothers had adequate ANC visits and low birth weight (LBW) was found among 833(4.63%) neonates. The birth of a LBW baby (aOR:4.64;95%CI:3.19,6.74) was directly related to increased odds of neonatal death. Mothers aged 20-34 years (aOR:0.40; 95%CI:0.20,0.81), a preceding birth interval of 24months or greater (aOR:0.41:95%CI:0.28,0.60), baby being female (aOR:0.72; 95%CI:0.54,0.96), having adequate ANC visits (aOR:0.64;95% CI:0.46,0.89) and the birth order of the newborn being ranked second or third (aOR:0.60; 95%CI:0.38,0.95) were negatively associated with neonatal death. CONCLUSION Health education programs targeting teen and primigravida mothers should be encouraged. Among the newborn survival interventions, addressing short birth intervals and the effective management of LBW cases should be explored. The findings confirm the fundamental importance of adequate ANC in the neonatal survival.
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Affiliation(s)
- Gérard Uwimana
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Mohamed Elhoumed
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
- National Institute of Public Health Research (INRSP), Nouakchott BP. 695, Nouakchott, Mauritania
| | - Mitslal Abrha Gebremedhin
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Qi Qi
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Mougni Mohamed Azalati
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Liang Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China
| | - Lingxia Zeng
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76, Yanta West Road, Xi'an, Shaanxi Province, 710061, People's Republic of China.
- Center for Chronic Disease Control and Prevention, Global Health Institute, Xi'an Jiaotong University, Xi'an, China.
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, China.
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Dhillon S, Amoak D, Sano Y, Antabe R, Luginaah I. The association between mother-to-child HIV transmission knowledge and antenatal care utilisation in Cameroon. Int J Health Plann Manage 2023; 38:1877-1888. [PMID: 37553752 DOI: 10.1002/hpm.3700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/30/2023] [Accepted: 07/29/2023] [Indexed: 08/10/2023] Open
Abstract
While the health benefits of antenatal care (ANC) utilisation for mothers and their infants have been well documented, very few studies have explored the association between mother-to-child transmission (MTCT) knowledge of human immunodeficiency virus (HIV) and mothers' utilisation of ANC in HIV endemic regions such as Cameroon. To address this void in the literature, we use the 2018 Cameroon Demographic and Health Survey to examine the association between mother's knowledge of MTCT of HIV and the three strands of ANC utilisation (i.e., number of ANC visits, timing to first ANC visit, and place of delivery). We found that women with adequate MTCT knowledge were more likely to have four to seven ANC visits (relative risk ratio [RRR] = 1.39, p < 0.001) and more than eight ANC visits (RRR = 1.43, p < 0.05), compared to their counterparts with inadequate knowledge. Similarly, women with adequate MTCT knowledge were more likely to attend ANC within the first trimester (odds ratio [OR] = 1.16, p < 0.05) and to give birth in a health facility (OR = 1.37, p < 0.001) than their counterparts with inadequate MTCT of HIV knowledge. These results remained robust after controlling for theoretically relevant variables. Based on these findings, we discussed several implications for policymakers and recommendations for future research.
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Affiliation(s)
- Satveer Dhillon
- Department of Geography and Environment, Western University, London, Ontario, Canada
| | - Daniel Amoak
- Department of Geography and Environment, Western University, London, Ontario, Canada
| | - Yujiro Sano
- Department of Sociology and Anthropology, Nipissing University, North Bay, Ontario, Canada
| | - Roger Antabe
- Department of Health and Society, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Isaac Luginaah
- Department of Geography and Environment, Western University, London, Ontario, Canada
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Tawfiq E, Azimi MD, Feroz A, Hadad AS, Soroush MS, Jafari M, Yaftali MS, Saeedzai SA. Predicting maternal healthcare seeking behaviour in Afghanistan: exploring sociodemographic factors and women's knowledge of severity of illness. BMC Pregnancy Childbirth 2023; 23:561. [PMID: 37533023 PMCID: PMC10398983 DOI: 10.1186/s12884-023-05750-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 05/31/2023] [Indexed: 08/04/2023] Open
Abstract
BACKGROUND Little is known whether women's knowledge of perceived severity of illness and sociodemographic characteristics of women influence healthcare seeking behavior for maternal health services in Afghanistan. The aim of this study was to address this knowledge gap. METHODS Data were used from the Afghanistan Health Survey 2018. Women's knowledge in terms of danger signs or symptoms during pregnancy was assessed. The signs or symptoms were bleeding, swelling of the body, headache, fever, or any other danger sign or symptom (e.g., high blood pressure). A categorical variable of knowledge score was created. The outcome variables were defined as ≥ 4 ANC vs. 0-3 ANC; ≥ 4 PNC vs. 0-3 PNC visits; institutional vs. non-institutional deliveries. A multivariable generalized linear model (GLM) was used. RESULTS Data were used from 9,190 ever-married women, aged 13-49 years, who gave birth in the past two years. It was found that 56%, 22% and 2% of women sought healthcare for institutional delivery, ≥ 4 ANC, ≥ 4 PNC visits, respectively, and that women's knowledge is a strong predictor of healthcare seeking [odds ratio (OR)1.77(1.54-2.05), 2.28(1.99-2.61), and 2.78 (2.34-3.32) on knowledge of 1, 2, and 3-5 signs or symptoms, respectively, in women with ≥ 4 ANC visits when compared with women who knew none of the signs or symptoms. In women with ≥ 4 PNC visits, it was 1.80(1.12-2.90), 2.22(1.42-3.48), and 3.33(2.00-5.54), respectively. In women with institutional deliveries, it was 1.49(1.32-1.68), 2.02(1.78-2.28), and 2.34(1.95-2.79), respectively. Other strong predictors were women's education level, multiparity, residential areas (urban vs. rural), socioeconomic status, access to mass media (radio, TV, the internet), access of women to health workers for birth, and decision-making for women where to deliver. However, age of women was not a strong predictor. CONCLUSION Our findings suggest that pregnant women's healthcare seeking behaviour is influenced by women's knowledge of danger signs and symptoms during pregnancy, women's education, socioeconomic status, access to media, husband's, in-laws' and relatives' decisions, residential area, multiparity, and access to health workers. The findings have implications for promoting safe motherhood and childbirth practices through improving women's knowledge, education, and social status.
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Affiliation(s)
- Essa Tawfiq
- The Kirby Institute, UNSW Sydney, Sydney, Australia.
| | | | - Aeraj Feroz
- Formerly the Ministry of Public Health, Kabul, Afghanistan
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Amoak D, Konkor I, Mohammed K, Saaka SA, Antabe R. Exposure to mass media family planning messages among men in Nigeria: analysis of the Demographic and Health Survey data. PeerJ 2023; 11:e15391. [PMID: 37273544 PMCID: PMC10237178 DOI: 10.7717/peerj.15391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 04/19/2023] [Indexed: 06/06/2023] Open
Abstract
Background Family planning (FP) is essential for improving health and achieving reproductive goals. Although men are important participants in FP decision-making within households in Nigeria, a country with one of the highest rates of maternal mortality, we know very little about their exposure to mass media FP messages. Methods Drawing theoretical insights from the structural influence model of health communication and using the 2018 Nigeria Demographic and Health Survey (n = 13,294), and applying logistic regression analysis, we explored the factors associated with men's exposure to mass media FP messages in Nigeria. Results A range of socioeconomic, locational, and demographic factors were associated with men's exposure to mass media FP messages. For example, wealthier, more educated, and employed men were more likely to be exposed to mass media FP messages than their poorer, less educated, and unemployed counterparts. In addition, compared to those in rural areas and other regions, men in urban areas as well as South East Region, were more likely to be exposed to mass media FP messages. Finally, younger men and those who belong to the traditional religion were less likely to be exposed to mass media FP messages, compared to their older and Christian counterparts. Conclusions Based on these findings, we discuss implications and recommendations for policymakers as well as directions for future research.
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Affiliation(s)
- Daniel Amoak
- University of Western Ontario, London, Ontario, Canada
| | | | | | | | - Roger Antabe
- University of Toronto, Scarborough, Ontario, Canada
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Uwimana G, Elhoumed M, Gebremedhin MA, Nan L, Zeng L. Determinants of timing, adequacy and quality of antenatal care in Rwanda: a cross-sectional study using demographic and health surveys data. BMC Health Serv Res 2023; 23:217. [PMID: 36879266 PMCID: PMC9988360 DOI: 10.1186/s12913-023-09231-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND Antenatal care (ANC) is a recommended intervention to lessen maternal and neonatal mortality. The increased rate in ANC coverage in most Sub-Saharan African countries is not considerably reducing the maternal and neonatal mortality. This disconnection has raised concerns to study further the trend and determinants of the ANC timing and quality. We aimed to assess the determinants and trend of the timing, the adequacy and the quality of antenatal care in Rwanda. METHOD A population-based cross-sectional study design. We used data from the 2010,2015 and 2020 Rwanda demographic and health surveys (RDHS). The study included 18,034 women aged 15-49 years. High quality ANC is when a woman had her first ANC visit within 3 months of pregnancy, had 4 or more ANC visits, received services components of ANC during the visits by a skilled provider. Bivariate analysis and multivariable logistic regression were used to assess the ANC (timing and adequacy), the quality of the content of ANC services and the associated factors. RESULTS The uptake of antenatal services increased in the last 15 years. For instance, the uptake of adequate ANC was 2219(36.16%), 2607(44.37%) and 2925(48.58%) respectively for 2010;2015 and 2020 RDHS. The uptake of high quality ANC from 205(3.48%) in 2010 through 510(9.47%) in 2015 to 779(14.99%) in 2020. Women with unwanted pregnancies were less likely to have timely first ANC (aOR:0.76;95%CI:0.68,0.85) compared to planned pregnancies, they were also less likely to achieve a high-quality ANC (aOR: 0.65;95%CI:0.51,0.82) compared to the planned pregnancies. Mothers with a secondary and higher education were 1.5 more likely to achieve a high-quality ANC (aOR:1.50;95%CI:1.15,1.96) compared to uneducated mothers. Increasing maternal age is associated with reduced odds of update of ANC component services (aOR:0.44;95%CI:0.25,0.77) for 40 years and above when referred to teen mothers). CONCLUSION Low-educated mothers, advanced maternal age, and unintended pregnancies are the vulnerable groups that need to be targeted in order to improve ANC-related indicators. One of the credible measures to close the gap is to strengthen health education, promote family planning, and promote service utilization.
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Affiliation(s)
- Gerard Uwimana
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No 76 West Yanta Road, Xi'an, 710061, Shaanxi Province, People's Republic of China
| | - Mohamed Elhoumed
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No 76 West Yanta Road, Xi'an, 710061, Shaanxi Province, People's Republic of China.,National Institute of Public Health Research (INRSP), BP. 695, Nouakchott, Mauritania
| | - Mitslal Abrha Gebremedhin
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No 76 West Yanta Road, Xi'an, 710061, Shaanxi Province, People's Republic of China
| | - Lin Nan
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No 76 West Yanta Road, Xi'an, 710061, Shaanxi Province, People's Republic of China
| | - Lingxia Zeng
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, No 76 West Yanta Road, Xi'an, 710061, Shaanxi Province, People's Republic of China. .,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, 710061, Shaanxi, P.R. China.
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