Kofi Nyarko
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Kofi Nyarko has a total of 130 co-authors. Here are the top co-authors by number of shared publications:
- Baffour Awuah
Komfo Anokye Teaching Hospital, Kumasi, Ghana
10 shared publications - Daniel Ansong
Kumasi Ashanti Region Kwame Nkrumah University of Science and Technology
10 shared publications - Joe-Nat Clegg-Lamptey
Department of Surgery, University of Ghana Medical School, Accra, Ghana
10 shared publications - Joel Yarney
Korle Bu Teaching Hospital, Accra, Ghana
10 shared publications - Jonine D. Figueroa
Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, USA
10 shared publications - Louise A. Brinton
Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
10 shared publications
Latest Publications
- Open Access
- 2 March 2026
- Published by Wiley in Health Science Reports
- Vol. 9 (3)
Cervical Cancer Screening Prevalence and Predictors Among Women Aged 25–49 Years in Ghana: A Cross‐Sectional Study
Background and Aims: Cervical cancer can be prevented by early detection through regular screening. The American Cancer Society advocates the initiation of cervical cancer screening from 25 years of age. Few studies in Ghana have used nationally representative data to examine the prevalence and predictors of cervical cancer screening (CCS). Therefore, this study examined the prevalence and predictors of CCS among women aged 25–49 years in Ghana. Methods: This study used cross‐sectional secondary data from the 2022 Ghana Demographic and Health Survey (GDHS), which involved 9510 women. Binary logistic regression was used to examine the predictors of CCS. All variables were considered statistically significant at a 95% confidence interval ( p ‐value < 0.05). Results: Overall, the prevalence of CCS was 6.90% (95% CI = 6.39%–7.41%). Women's age, educational level, marital status, parity, ecological zone, age at menarche, HIV testing, frequency of listening to the radio, and interaction between age and parity were predictors of CCS. On the one hand, women who had 6 or more children (95% CI = 0.04–0.54), those aged 45–49 years with 4–5 children (95% CI = 0.04–0.98), and those with menarche at ≥ 15 years (95% CI = 0.59–0.97), were less likely to screen for cervical cancer. On the other hand, women with tertiary education (95% CI = 1.07–10.84), those from the Northern ecological zone (95% CI = 1.34–3.23), and those who had ever tested for HIV (95% CI = 1.49–3.36), were more likely to screen for cervical cancer. Conclusion: The prevalence of CCS is low in Ghana, and there is an urgent need for policymakers to enhance health promotion campaigns on cervical cancer screening to increase the uptake of screening services.
- 2 March 2026
- Published by Wiley in Health Science Reports
- Vol. 9 (3)
Open AccessCervical Cancer Screening Prevalence and Predictors Among Women Aged 25–49 Years in Ghana: A Cross‐Sectional Study
Background and Aims: Cervical cancer can be prevented by early detection through regular screening. The American Cancer Society advocates the initiation of cervical cancer screening from 25 years of age. Few studies in Ghana have used nationally representative data to examine the prevalence and predictors of cervical cancer screening (CCS). Therefore, this study examined the prevalence and predictors of CCS among women aged 25–49 years in Ghana. Methods: This study used cross‐sectional secondary data from the 2022 Ghana Demographic and Health Survey (GDHS), which involved 9510 women. Binary logistic regression was used to examine the predictors of CCS. All variables were considered statistically significant at a 95% confidence interval ( p ‐value < 0.05). Results: Overall, the prevalence of CCS was 6.90% (95% CI = 6.39%–7.41%). Women's age, educational level, marital status, parity, ecological zone, age at menarche, HIV testing, frequency of listening to the radio, and interaction between age and parity were predictors of CCS. On the one hand, women who had 6 or more children (95% CI = 0.04–0.54), those aged 45–49 years with 4–5 children (95% CI = 0.04–0.98), and those with menarche at ≥ 15 years (95% CI = 0.59–0.97), were less likely to screen for cervical cancer. On the other hand, women with tertiary education (95% CI = 1.07–10.84), those from the Northern ecological zone (95% CI = 1.34–3.23), and those who had ever tested for HIV (95% CI = 1.49–3.36), were more likely to screen for cervical cancer. Conclusion: The prevalence of CCS is low in Ghana, and there is an urgent need for policymakers to enhance health promotion campaigns on cervical cancer screening to increase the uptake of screening services.
- Open Access
- 24 January 2026
- Published by Springer Nature in Journal of Medical Case Reports
- Vol. 20 (1)
Coronavirus disease 19 death among infants with complications of severe acute malnutrition, Kenema district, Sierra Leone, June 2020: a case series
Coronavirus disease 2019, is an infectious disease caused by the severe acute respiratory syndrome corona virus type-2 virus. Children affected are usually
- 24 January 2026
- Published by Springer Nature in Journal of Medical Case Reports
- Vol. 20 (1)
Open AccessCoronavirus disease 19 death among infants with complications of severe acute malnutrition, Kenema district, Sierra Leone, June 2020: a case series
Coronavirus disease 2019, is an infectious disease caused by the severe acute respiratory syndrome corona virus type-2 virus. Children affected are usually
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S3 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S3: Beta coefficients (β) and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with tumor grade among breast cancer patients participating in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S3 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S3: Beta coefficients (β) and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with tumor grade among breast cancer patients participating in the Ghana Breast Health Study
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S1 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S1: Optimized machine learning parameters for cell detection on digitized hematoxylin and eosin-stained breast cancer sections from participants in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S1 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S1: Optimized machine learning parameters for cell detection on digitized hematoxylin and eosin-stained breast cancer sections from participants in the Ghana Breast Health Study
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Figure S1 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Figure S1: Correlation between standard Ta-SCD and percent Ta-SCD. Standard Ta-SCD was calculated by dividing the total number of cells in the stroma by the total stromal area (mm2). Standard Ta-SCD was converted to a percentage by multiplying the total number of nucleated cells by the average area (mm2) of a single nucleus to generate total nuclei area (mm2), dividing this by the total stromal (cellular + non-cellular) area (mm2), and multiplying by 100.
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Figure S1 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Figure S1: Correlation between standard Ta-SCD and percent Ta-SCD. Standard Ta-SCD was calculated by dividing the total number of cells in the stroma by the total stromal area (mm2). Standard Ta-SCD was converted to a percentage by multiplying the total number of nucleated cells by the average area (mm2) of a single nucleus to generate total nuclei area (mm2), dividing this by the total stromal (cellular + non-cellular) area (mm2), and multiplying by 100.
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S2 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S2: Beta coefficients (β) and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with tumor-associated stromal cellular density among breast cancer patients participating in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S2 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S2: Beta coefficients (β) and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with tumor-associated stromal cellular density among breast cancer patients participating in the Ghana Breast Health Study
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Data from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Background:The stromal microenvironment (SME) is integral to breast cancer biology, impacting metastatic proclivity and treatment response. Emerging data indicate that host factors may impact the SME, but the relationship between prediagnostic host factors and SME phenotype remains poorly characterized, particularly among women of African ancestry.Methods:We conducted a case-only analysis involving 792 patients with breast cancer (17–84 years) from the Ghana Breast Health Study. High-accuracy machine-learning algorithms were applied to standard H&E-stained images to characterize SME phenotypes [including percent tumor-associated connective tissue stroma, Ta-CTS (%); tumor-associated stromal cellular density, Ta-SCD (%)]. Associations between prediagnostic host factors and SME phenotypes were assessed in multivariable linear regression models.Results:Decreasing Ta-CTS and increasing Ta-SCD were associated with aggressive, mostly high-grade tumors (P-value < 0.001). Several prediagnostic host factors were associated with Ta-SCD independently of tumor characteristics. Compared with nulliparous women, parous women had higher levels of Ta-SCD [mean (standard deviation, SD) = 31.3% (7.6%) vs. 28.9% (7.1%); P-value = 0.01]. Similarly, women with a positive family history of breast cancer had higher levels of Ta-SCD than those without family history [mean (SD) = 33.0% (7.5%)] vs. 30.9% (7.6%); P-value = 0.03]. Conversely, increasing body size was associated with decreasing Ta-SCD [mean (SD) = 31.6% (7.4%), 31.4% (7.3%), and 30.1% (8.0%) for slight, average, and large body sizes, respectively; P-value = 0.005].Conclusions:Epidemiological risk factors were associated with varying degrees of stromal cellularity in tumors, independently of clinicopathological characteristics.Impact:The findings raise the possibility that epidemiological risk factors may partly influence tumor biology via the stromal microenvironment.See related In the Spotlight, p. 459
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessData from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Background:The stromal microenvironment (SME) is integral to breast cancer biology, impacting metastatic proclivity and treatment response. Emerging data indicate that host factors may impact the SME, but the relationship between prediagnostic host factors and SME phenotype remains poorly characterized, particularly among women of African ancestry.Methods:We conducted a case-only analysis involving 792 patients with breast cancer (17–84 years) from the Ghana Breast Health Study. High-accuracy machine-learning algorithms were applied to standard H&E-stained images to characterize SME phenotypes [including percent tumor-associated connective tissue stroma, Ta-CTS (%); tumor-associated stromal cellular density, Ta-SCD (%)]. Associations between prediagnostic host factors and SME phenotypes were assessed in multivariable linear regression models.Results:Decreasing Ta-CTS and increasing Ta-SCD were associated with aggressive, mostly high-grade tumors (P-value < 0.001). Several prediagnostic host factors were associated with Ta-SCD independently of tumor characteristics. Compared with nulliparous women, parous women had higher levels of Ta-SCD [mean (standard deviation, SD) = 31.3% (7.6%) vs. 28.9% (7.1%); P-value = 0.01]. Similarly, women with a positive family history of breast cancer had higher levels of Ta-SCD than those without family history [mean (SD) = 33.0% (7.5%)] vs. 30.9% (7.6%); P-value = 0.03]. Conversely, increasing body size was associated with decreasing Ta-SCD [mean (SD) = 31.6% (7.4%), 31.4% (7.3%), and 30.1% (8.0%) for slight, average, and large body sizes, respectively; P-value = 0.005].Conclusions:Epidemiological risk factors were associated with varying degrees of stromal cellularity in tumors, independently of clinicopathological characteristics.Impact:The findings raise the possibility that epidemiological risk factors may partly influence tumor biology via the stromal microenvironment.See related In the Spotlight, p. 459
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S4 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S4: Coefficients and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with parity (vs nulliparous) among breast cancer patients participating in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S4 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S4: Coefficients and 95% confidence intervals (CI) for the associations of breast cancer risk factors and clinicopathological characteristics with parity (vs nulliparous) among breast cancer patients participating in the Ghana Breast Health Study
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S5 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S5: Beta coefficients (β) and 95% confidence intervals (CI) for the associations between breast cancer risk factors and Tumor-associated Stromal Cellular Density (Ta-SCD) among patients <50 and ≥50 years of age participating in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S5 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S5: Beta coefficients (β) and 95% confidence intervals (CI) for the associations between breast cancer risk factors and Tumor-associated Stromal Cellular Density (Ta-SCD) among patients <50 and ≥50 years of age participating in the Ghana Breast Health Study
- Open Access
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Supplementary Table S6 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S6: Beta coefficients (β) and 95% confidence intervals (CI) for the associations between breast cancer risk factors and Tumor-associated Stromal Cellular Density among patients with ER+ and ER- breast cancer participating in the Ghana Breast Health Study
- 3 April 2025
- Published by American Association for Cancer Research (AACR)
Open AccessSupplementary Table S6 from Contribution of Prediagnostic Host Factors to Shaping the Stromal Microenvironment of Breast Cancer among Sub-Saharan African Women
Supplementary Table S6: Beta coefficients (β) and 95% confidence intervals (CI) for the associations between breast cancer risk factors and Tumor-associated Stromal Cellular Density among patients with ER+ and ER- breast cancer participating in the Ghana Breast Health Study