Research | Open Access | Volume 9 (1): Article 18 | Published: 29 Jan 2026
Menu, Tables and Figures
| Variable | Suspected | Tested | Positives | ANC | MiP IR / 1,000 [95% CI] |
|---|---|---|---|---|---|
| MiP | MiP (%) | MiP (%) | Reg | ||
| Year | |||||
| 2018 | 8,357 | 7,843 | 4,739 | 22,181 | 213.7 [208.3 – 217.1] |
| 2019 | 11,857 | 10,505 | 5,416 | 23,604 | 229.5 [224.1 – 234.9] |
| 2020 | 10,760 | 9,249 | 5,413 | 24,614 | 219.9 [214.8 – 225.1] |
| 2021 | 9,057 | 8,152 | 4,223 | 25,155 | 167.9 [163.3 – 172.6] |
| 2022 | 11,448 | 10,985 | 5,673 | 25,266 | 224.5 [219.4 – 229.7] |
| Age | |||||
| 10–19 yrs | 10,048 | 9,144 | 5,392 | 16,906 | 318.9 [311.9 – 326.0] |
| 20–34 yrs | 32,853 | 29,838 | 16,293 | 86,716 | 187.9 [185.3 – 190.5] |
| 35+ yrs | 8,578 | 7,752 | 3,779 | 17,198 | 219.7 [213.6 – 226.0] |
| District | |||||
| Bole | 16,797 | 14,723 | 10,315 | 25,646 | 402.2 [396.2 – 408.2] |
| Central Gonja | 12,144 | 11,380 | 5,104 | 27,427 | 186.1 [181.5 – 190.6] |
| East Gonja | 5,813 | 5,586 | 2,423 | 19,731 | 122.8 [118.3 – 127.5] |
| North Gonja | 2,594 | 2,228 | 1,329 | 11,353 | 117.1 [111.2 – 123.1] |
| North-East Gonja | 1,827 | 1,496 | 563 | 7,344 | 76.7 [70.6 – 83.0] |
| Sawla-Tuna-Kalba | 7,048 | 6,197 | 4,289 | 17,480 | 245.4 [239.0 – 251.8] |
| West Gonja | 5,256 | 5,124 | 1,441 | 11,839 | 121.7 [115.9 – 127.7] |
| Total | 51,479 | 46,734 | 25,464 | 120,820 | 210.8 [208.5 – 213.1] |
*IR = Incidence Rate






Jonathan Wadeyir Abesig1, Joseph Chantiwuni Nindow1, Annungma Christopher Bagonluri2, Kwabena Adjei Sarfo3,&, Magdalene Akos Odikro4, Gyesi Razak Issahaku4, George Akowah4, Delia Akosua Bandoh4, Ernest Kenu4, Williams Azumah Abanga5, Chrysantus Kubio3
1Ghana Health Service, Bole District Hospital, Bole, Savannah Region, Ghana, 2Ghana Health Service, Sawla-Tuna-Kalba District Health Directorate, Sawla, Savannah Region, 3Savannah Regional Health Directorate, Ghana Health Service, Damongo, Ghana, 4Ghana Field Epidemiology and Laboratory Training Program, School of Public Health, College of Health Sciences, University of Ghana, Legon, Accra, 5Saboba District Health Directorate, Ghana Health Service, Saboba, Ghana
Received: 25 Mar 2025, Accepted: 26 Jan 2026, Published: 29 Jan 2026
Domain: Maternal Health
Keywords: Malaria in pregnancy, trend, Savannah region, Ghana
©Jonathan Wadeyir Abesig et al. Journal of Interventional Epidemiology and Public Health (ISSN: 2664-2824). This is an Open Access article distributed under the terms of the Creative Commons Attribution International 4.0 License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Cite this article: Jonathan Wadeyir Abesig et al., Incidence, trend and geographical disparity of malaria in pregnancy, Savannah Region, Ghana, 2018-2022. Journal of Interventional Epidemiology and Public Health. 2026; 9(1):18. https://doi.org/10.37432/jieph-d-25-00101
Introduction: Malaria in pregnancy (MiP) remains a major public health concern in Ghana despite the heavy investment in the fight against malaria. The burden of MiP in the Savannah Region is not well documented. This study described the incidence and distribution of MiP in the region from 2018 to 2022.
Methods: We carried out a cross-sectional descriptive analysis. Institutional MiP and ANC data from 2018 to 2022 in the Savannah Region, was extracted from DHIMS2 and sent to Microsoft Excel 19. Descriptive statistical analyses were performed. Results were summarized in tables, graphs, and maps.
Results: A total of 51,479 pregnant women were suspected of malaria, out of which 90.8% (46,734/51,479) were tested. More than half of the pregnant women were confirmed positive for malaria, 54.5% (54.0 – 54.9). Most of the cases were among adolescent pregnant women, 59.0% (58.0 – 60.0). The incidence of MiP over the five years was 210.8 (208.5 – 213.1) per 1,000. Adolescent pregnant women were more affected, 318.9 (311.9 – 326.0) per 1,000. The highest incidence was reported in the Bole District, 402.2 (396.2 – 408.2) per 1,000 pregnant women, while the North-East-Gonja District reported the lowest incidence, 76.7 (70.6 – 83.0) per 1,000. The trend of the MiP was relatively stable, marginally increasing from 213.7 (208.3 – 217.1) per 1,000 in 2018 to 224.5 (219.4 – 229.7) per 1,000 in 2022.
Conclusion: The incidence of MiP in the Savannah Region was high, with Bole District recording the highest incidence among the seven districts of the region. There is a need for community-level education, especially among pregnant women, on adherence to malaria control interventions. Further research is required to help determine factors associated with MiP in high-incidence districts.
Malaria in pregnancy (MiP) continues to be a public health issue with significant deleterious effects on the health of both mothers and children [1]. Maternal anaemia, low birthweight, premature delivery, and maternal and newborn mortalities are among the problems linked to MiP [2–8]. The World Health Organization (WHO) reported that in 2021, 13.3 million pregnant women were exposed to malaria in Africa [9].
In Ghana, three key strategies are employed for the elimination of pregnancy-related malaria: case management, sulfadoxine-pyramethamine intermittent preventive treatment during pregnancy (IPTp) and use of insecticide-treated bed nets (ITNs) [10].Notwithstanding the huge investment made to eliminate malaria, the disease remains a serious health issue among pregnant women in Ghana. For instance, pregnant women continue to have a high rate of positive malaria tests, even though a study reported the rate declined from 54.0% to 34.5% between 2014 and 2021 [11]. Also, the prevalence of MiP in Ghana is 5–11% in the coastal areas, 5–20% in the transition and forest zones, and 13–26% in the northern savannah zone [12]. Other researchers reported malaria prevalence among pregnant women to be 20.9% in the Shai-Odoku District [13], 20.4% in the Bono East Region [14], and between 13.4% to 14.1% in northern Ghana [15].
Previous studies have revealed the burden of malaria in the general population and children under five years in Ghana and the Bole District of the Savannah Region [13, 16, 17]. Malaria infections are reported among pregnant women seeking care at the various healthcare facilities across the Savannah Region. However, despite the routine surveillance of malaria in the region, the incidence of malaria during pregnancy is not well documented. Therefore, there is a need to research the incidence of MiP in the Savannah Region to help understand the burden. The findings will also help inform the implementation of interventions and strategies for the elimination of malaria during pregnancy. We described the incidence, trend and geographical disparities of MiP in the Savannah Region.
Study design and setting
We carried out a descriptive cross-sectional study of MiP secondary data from the District Health Information Management System 2 (DHIMS2) from 2018 to 2022. This study was conducted in Ghana’s Savannah Region. It is part of the newly established regions in 2019 and was carved out from the Northern Region. There are seven districts in the region with an estimated 653,266 population [18]. It is the largest region in terms of landmass, covering about 15% of Ghana’s land area with 35,862 km2. There are 206 health facilities in the region, including district hospitals, polyclinics, health centers and Community-based Health Planning Services (CHPS) compounds [19]. The region’s vegetation is mainly grassland, with two seasons. The rainy season is from May to November, whereas the dry season begins in December and ends in April. The general vegetation has favourable conditions for malaria transmission [20]. Most of the inhabitants are engaged in farming and agricultural activities. There are some communities in the region in which illegal mining (Galamsey) activities take place. Dollar Power, located in the Bole District, is one such community. The region is home to the Mole National Park, exposing the population to vector-borne diseases. The White and Black Volta Rivers and their tributaries traverse the region, affecting access to healthcare services in the rainy season [19].
Operational definitions
ANC registrant: a pregnant woman booked at any of the ANC clinics to start and continue antenatal care.
Suspected MiP case: any pregnant woman with fever within the previous two days.
Tested MiP case: a suspected malaria in pregnancy case for which a malaria test is carried out either using a malaria Rapid Diagnostic Test (mRDT) or a microscopy test.
Positive MiP: any pregnant woman tested and malaria parasites are confirmed to be present using mRDT or microscopy.
MiP incidence rate: number of positive MiP cases divided by ANC registrants multiplied by 1,000.
Data collection
MiP data was extracted from DHIMS2 for the period 2018 to 2022 using the Pivot Table App. The DHIMS2 is a digital database used to maintain data on health services provided by health facilities across Ghana [21]. The extracted data was exported into Microsoft Excel version 19. We extracted the following MiP variables based on district, age and year: the number of suspected MiP, tested MiP, and positive MiP. These were the available variables in the routine DHIMS2 dataset for this study. We also extracted the total antenatal (ANC) registrants for each year per district. For analytical purposes, the DHIMS2 data extracted were categorized into 10-19 years, 20-34 years, and 35 years and above based on established pregnancy risk profiles [22–24]. Adolescents (10-19 years) and older pregnant women (35 years and above) are recognized as high-risk groups for adverse maternal and pregnancy outcomes, including malaria in pregnancy, while women aged 20-34 years represent the lower-risk reference group. The risk-based categorization was applied to facilitate meaningful comparison of malaria burden across maternal risk groups and to enhance the programmatic relevance of the findings for maternal health and malaria control interventions [22, 25].
Malaria in Pregnancy cases were counted per diagnosis, meaning a woman could be counted more than once if she tested positive on multiple occasions during the same pregnancy. The denominator was based on the first ANC attendance per each pregnancy. All hospitals within the districts included in this study were fully reporting into DHIMS2 throughout the study period [19, 26, 27].
Consequently, no hospitals within the study districts were not reporting, and the proportion of non-reporting hospitals was zero. The district-level incidence and positivity estimates, therefore, reflect data captured from all hospitals serving pregnant women in these districts.
Quality assurance measures
Monthly reports are usually verified and audited at the health facility level before the information is entered into the DHIMS2 database. The district and regional health authorities also carry out routine data quality checks to ensure that the data in the database is of good quality.
Data cleaning
The data was cleaned by checking for completeness and consistency. We inspected and compared the DHIMS2 data with reports generated by the health facilities and submitted to the district level to ensure it was the right data. Also, the variables were rearranged into columns to help make identification and aggregation easy.
Data analysis
The data analysis was conducted using Microsoft Excel 2019 and Quantum Geographic Information System (QGIS) 3.30. We used rates and frequencies to perform descriptive statistics by person, place and time. The QGIS was used to generate choropleth maps to illustrate the geographical disparities of MiP incidence in the region. The shapefiles for the maps were extracted from the DHIMS2 database. The results were presented in tables, graphs and maps.
Ethical approval
The Savannah Regional Health Directorate granted administrative permission to access the DHIMS2 database and use the dataset for the study. Ethical clearance was not sought because the data were generated and used for routine service provision. No identifiable names or addresses were used in the study. All data extracted from DHIMS2 were anonymized before analysis, with only aggregated counts presented at the district and regional levels. Individual-level identifiers such as patient names, IDs, and contact details were neither accessed nor reported, ensuring full compliance with ethical standards and safeguarding participant confidentiality. The data was securely stored on a computer with password protection, accessible only by the principal researcher.
Background characteristics of reported MiP cases
Over the five years, a total of 51,479 suspected malaria in pregnancy cases were recorded, out of which 90.8% (46,734/51,479) were tested. More than half of the pregnant women were confirmed positive for malaria, 54.5% (54.0 – 54.9). The majority of malaria cases were adolescent pregnant women, 59.0% (58.0 – 60.0) (Table 1).
Incidence of MiP
The MiP incidence rate in the Savannah Region over the 5-year study period was 210.8 (208.5 – 213.1) per 1,000. Adolescent pregnant women were more affected, 318.9 (311.9 – 326.0) per 1,000 (Table 2). The trend of the MiP incidence rate over the study period was relatively stable, with a marginal increase from 213.7 (208.3 – 217.1) per 1,000 pregnant women in 2018 to 224.5 (219.4 – 229.7) per 1,000 pregnant women in 2022. However, there was an apparent drop in 2021 from 219.9/1000 pregnant women in 2020 to 167.9/1000 pregnant women in 2021 (Figure 1). Bole District recorded the highest incidence rate, almost double that of the regional rate, 402.2 (396.2 – 408.2) per 1,000 pregnant women, while the North-East-Gonja District reported the lowest rate, 76.7 (70.6 – 83.0) per 1,000 pregnant women (Figure 2).
The study utilized data from the DHIMS2 in the Savannah Region to describe the trend of the MiP incidence rate for 2018 – 2022. The trend in the incidence rate of MiP has been relatively stable. It only increased marginally from 213.7 cases/1,000 pregnant women to 224.5 cases/1,000 pregnant women in 2022, with an average incidence rate of 210.8 cases per 1,000 pregnant women.
There have been few studies in Ghana estimating the MiP incidence rate, making comparison difficult. According to a study conducted in the Northern Region of Ghana among pregnant women in their 3rd trimester of pregnancy in four hospitals, the MiP incidence rate was found to be 95 cases/1,000 pregnant women (9.5%) [6]. This was a prospective cohort study among pregnant women in their 3rd trimester of pregnancy and hence may not represent the true reflection of MiP incidence. Our findings, however, agreed with the malaria incidence rate in the general population conducted by USAID and CDC under the U.S President’s Malaria Initiative (Ghana Malaria Profile), which found a malaria incidence rate of 224.3 cases/1,000 population [28]. Comparing the findings of this study to findings in the neighbouring country, Burkina Faso, the MiP in Burkina Faso is not only higher but also shows an increasing trend, increasing from 310 cases/1,000 pregnant women in 2015 to 567 cases/1,000 pregnant women in 2017 [29]. The marginal increase in the MiP incidence rate in the Savanah Region over the five years raises concerns about the effectiveness of strategies used for the implementation of interventions to prevent MiP in the region, such as the use of ITNs and IPTp-SP.
From 2021 to 2022, there was a drop in the MiP incidence rate, from 219.9 cases per 1,000 pregnant women to 167.9 per 1,000 pregnant women. This drop was most likely due to the COVID-19 pandemic, possibly because pregnant women with malaria were hesitant to go to health facilities to avoid contracting COVID-19.According to a study conducted in northern Ghana, the COVID-19 pandemic also disrupted the provision of IPTp-SP to pregnant women, as well as the disruption in routine ITN distribution during ANC [30]. The limited access to IPTp-SP and ITNs due to the COVID-19 impact increased the risk of pregnant women getting malaria, coupled with pregnant women now accessing ANC services when the COVID-19 restrictions were lifted fully in 2022, which explained why the MiP incidence rate surged to 224.5 cases/1,000 pregnant women in 2022. In general, the trend of MiP in the Savannah Region was relatively stable, only increasing marginally over the study period. This does not reflect the global trend of decreasing malaria burden. In this post-COVID-19 pandemic era, all preventive measures must be scaled up in the region to mitigate the possible effects of the COVID-19 pandemic in the fight against MiP.
MiP affected all age groups. However, the incidence rate was noted to be highest among adolescent pregnant women. This finding is consistent with a study in Ghana by Osarfo and colleagues, which reported that the infection during pregnancy is high among teenage mothers and young women [12]. It further corroborates another research, which indicated that sub-Saharan African adolescent mothers are at an increased risk of clinical malaria during pregnancy as well as placental malaria compared to adult mothers [31]. This age category of pregnant women and women of primigravidae has reduced immunity against malaria, especially placental infection, and therefore suffers increased consequences of MiP, including preeclampsia [11, 32]. Dihydroartemisinin-Piperaquine use for IPTp (IPTp-DHA-PPQ) is said to lead to a lower incidence of MiP and at childbirth compared to IPTp-SP. It could be explored in this group of pregnant women [33].
Bole and Sawla-Tuna-Kalba were the only districts with MiP incidence rates above the regional average. The Bole District MiP incidence rate of 402.2 cases/1,000 pregnant women is almost double the regional MiP incidence rate of 210.8 cases/1,000 pregnant women. Principally, this alone is responsible for the high incidence of MiP in the Savannah Region. The Bole and STK districts share borders with the Ivory Coast and the Burkina Faso, respectively, and communities nearby cross these districts to access healthcare when they are unwell. These countries are noted to have a high incidence of malaria in pregnancy [29]. This could be one of the reasons for the observation in this study. The Bole District also has some ongoing illegal mining activities. The illegal mining pits, especially in the rainy seasons, could serve as breeding sites for mosquitoes. People from other districts, parts of Ghana, and even neighbouring Ivory Coast and Burkina come into the Bole District for galamsey, with resultant pregnancies being at increased risk of MiP. All the above are possible factors contributing to the high MiP incidence in the Bole District. However, factors such as errors in documentation, prescriber testing practices, and test performance, among others, could equally be responsible for the observed trend
Strengths and limitations of this study
This study provides baseline information on the burden of MiP and hypotheses for future research. Also, the study used data from DHIMS2, hence there was no potential effect of respondent and recall bias. The data used in this study were large, with all confirmed MiP cases over the study period; hence, the findings are representative of the MiP situation in the region.
This study also has some limitations, despite the strengths enumerated above. The best way to estimate the MiP incidence rate is a prospective cohort study. However, this study analyzed routine health facility data, which could underestimate the burden of MiP in the region. Additionally, due to the use of secondary data, it is not entirely possible to guarantee the quality of data reported into the database. Therefore, data capture errors might not have been sufficiently rectified. Analysis of the data could not be done at the individual woman’s level due to the aggregated nature of the DHIMS2 data.
The study demonstrated a high incidence of MiP in the Savannah Region, with an overall regional incidence of 210.8/1000 pregnancies. Substantial geographical disparities were observed, with the Bole district recording the highest incidence rate of 402.2/1000 pregnancies. Again, adolescent pregnancies emerged as a particularly vulnerable group, reflecting a significant burden within this population. These findings highlight the persistent public health challenge posed by MiP in the region and underscore the need for the Savannah Regional Health Directorate to engage all its stakeholders in the fight against MiP and intensify awareness and health education among pregnant women and community members on the adverse effects of MiP. Further research is needed to help determine the factors associated with MiP in high-incidence districts.
What is already known about the topic
MiP remains a major public health concern in Ghana.
Adverse maternal and child outcomes are linked to MiP.
What this study adds
WJA, CK, CJAN, GA and GRI: conceptualized the study. WJA, KAS, WAA and ACB: extracted and analyzed the data. WJA and CJAN: drafted the manuscript. DAB, CK, GRI, WAA, KAS and EK: reviewed the manuscript. All authors read and approved the final version of the manuscript for submission.
| Variable | Suspected MiP | Tested MiP | Positives MiP | ANC Reg | MiP IR / 1,000 [95% CI] |
|---|---|---|---|---|---|
| Year | |||||
| 2018 | 8,357 | 7,843 | 4,739 | 22,181 | 213.7 [208.3 – 217.1] |
| 2019 | 11,857 | 10,505 | 5,416 | 23,604 | 229.5 [224.1 – 234.9] |
| 2020 | 10,760 | 9,249 | 5,413 | 24,614 | 219.9 [214.8 – 225.1] |
| 2021 | 9,057 | 8,152 | 4,223 | 25,155 | 167.9 [163.3 – 172.6] |
| 2022 | 11,448 | 10,985 | 5,673 | 25,266 | 224.5 [219.4 – 229.7] |
| Age | |||||
| 10–19 yrs | 10,048 | 9,144 | 5,392 | 16,906 | 318.9 [311.9 – 326.0] |
| 20–34 yrs | 32,853 | 29,838 | 16,293 | 86,716 | 187.9 [185.3 – 190.5] |
| 35+ yrs | 8,578 | 7,752 | 3,779 | 17,198 | 219.7 [213.6 – 226.0] |
| District | |||||
| Bole | 16,797 | 14,723 | 10,315 | 25,646 | 402.2 [396.2 – 408.2] |
| Central Gonja | 12,144 | 11,380 | 5,104 | 27,427 | 186.1 [181.5 – 190.6] |
| East Gonja | 5,813 | 5,586 | 2,423 | 19,731 | 122.8 [118.3 – 127.5] |
| North Gonja | 2,594 | 2,228 | 1,329 | 11,353 | 117.1 [111.2 – 123.1] |
| North-East Gonja | 1,827 | 1,496 | 563 | 7,344 | 76.7 [70.6 – 83.0] |
| Sawla-Tuna-Kalba | 7,048 | 6,197 | 4,289 | 17,480 | 245.4 [239.0 – 251.8] |
| West Gonja | 5,256 | 5,124 | 1,441 | 11,839 | 121.7 [115.9 – 127.7] |
| Total | 51,479 | 46,734 | 25,464 | 120,820 | 210.8 [208.5 – 213.1] |


