Investigator

Nixon Niyonzima

Cancer Biology/Molecular Pathology · Uganda Cancer Institute, Research

About

Research Interests

NNNixon Niyonzima
Papers(3)
Awareness, knowledge,…Coverage and Socioeco…Diagnostic Accuracy o…
Collaborators(10)
Provia AinembabaziRogers KajabwanguSulaiman B. WasukiraThomas C. RandallAlexcer NamuliAlfred JathoCesar CastroChristopher OkenyDahye BaikDerrick Bary Abila
Institutions(7)
Uganda Cancer Institu…Infectious Diseases I…Mbarara University Of…Columbia University M…Massachusetts General…National Cancer CenterMakerere University

Papers

Awareness, knowledge, and attitude toward cervical cancer screening and prevention in Uganda

Cervical cancer is the most prevalent cancer in Uganda, posing a significant burden with high mortality rates. Early detection through screening is crucial to reduce cervical cancer mortality. This study aimed to investigate the awareness, knowledge, and attitudes toward cervical cancer and its screening among residents in the central and western regions of Uganda. Cross-sectional study. A cross-sectional study was conducted through face-to-face interviews using a structured questionnaire, during October and November 2023 in Kampala City, Mbarara City, and Mbarara District. A total of 2000 men and women aged ≥20 years participated in the study. Among the respondents, 95 % were aware of cervical cancer, 85.1 % knew about cervical cancer screening, 37.8 % had heard of the human papillomavirus (HPV), and only 18.9 % recognized HPV as a major risk factor. Among females, 35 % had undergone cervical cancer screening. The most significant barrier preventing access to screening was a lack of knowledge (74.1 %). More than half of the respondents considered cervical cancer to be a fatal disease (52.9 %), and 93.7 % of females expressed willingness to undergo screening if provided for free. While awareness of cervical cancer and its screening was high, knowledge of HPV and actual cervical cancer screening rates were low, despite a high willingness to undergo screening. Increased investment in education and awareness campaigns, along with an organized cervical cancer screening program, is warranted to promote screening and reduce the cervical cancer burden in Uganda.

Coverage and Socioeconomic Inequalities in Cervical Cancer Screening in Low- and Middle-Income Countries Between 2010 and 2019

PURPOSE Cervical cancer screening is vital in addressing the global burden of cervical cancer. In this study, we describe the coverage and socioeconomic inequalities in the coverage of cervical cancer screening in low- and middle-income countries (LMICs). METHODS We analyzed data from the women's recode files of the Demographic and Health Surveys conducted in LMICs from 2010 to 2019 with variables on cervical cancer screening. We included women 21 years or older and determined the proportion of women who were screened for cervical cancer by age categories, wealth quintile, type of place of residence, level of education, and marital status. Socioeconomic inequality was measured using the concentration index (CIX) and the slope index of inequality (SII). RESULTS A total of 269,506 women from 20 surveys in 16 countries were included in the survey. Generally, there was a low coverage of screening, with lower rates among women age 21-24 years, living in rural areas, in the poorest wealth quintile, with no formal education, and who have never been in union with or lived with a man. The CIX and SII values for screening for cervical cancer were positive (pro-rich) for all the countries except Tajikistan in 2012 where they were negative (pro-poor). CONCLUSION The coverage of cervical cancer screening was low in LMICs with variations by the quintile of wealth (pro-rich) and type of place of residence (pro-urban). To achieve the desired impact of cervical cancer screening services in LMICs, the coverage of cervical cancer screening programs must include women irrespective of the type of place and wealth quintiles.

Diagnostic Accuracy of Serum P16ink4A and FOX‐P3 Concentrations for Detection of Cervical Lesions Among Women Attending a Cervical Cancer Clinic in Western Uganda: A Case‐Control Study

Introduction: Expression of P16ink4A and FOXP3 is correlated with the grades of cervical lesions. In this study, we determined the diagnostic accuracy of serum P16ink4A and FOXP3 concentrations for detection of cervical intraepithelial neoplasia (CIN) and cervical cancer (CC) in a rural setting in Southwestern Uganda. Material and Methods: CIN and CC cases (93 each before treatment), and 93 controls were identified. Clinical and demographic data were documented before quantifying serum P16ink4A and FOXP3 concentrations using quantitative ELISA kits. Cases were confirmed by cytology and/or histology. We employed descriptive statistics, cross‐tabulation, and receiver operating curves (ROC) using statistical software for data science (STATA) 17.  p ‐values <0.05 were considered statistically significant. Results: Serum FOXP3 concentration of 0.0545 ng/mL < showed moderate sensitivity (32.22% and 57.78%) for detection of CIN and CC from healthy controls, respectively. It also showed a moderately high specificity of 68.89% for detection of both CIN and CC from healthy controls (AUC‐0.6014 and 0.7679, respectively). Serum P16ink4A concentration of 0.946 ng/mL < showed moderate sensitivities (50.00% and 60.00%) and specificities (56.67% and 55.56%) for the detection of CIN and CC from healthy controls, respectively (AUC‐0.6085 and 0.7592, respectively). A combination of elevated serum FOXP3 and P16ink4A showed very low sensitivities of 18.89% in detecting CIN from healthy controls and 33.33% for detecting CC from healthy controls. This combination showed high specificity of 83.33% in detecting both CIN and CC from healthy controls (AUC‐0.5992 and 0.7642, respectively). Conclusion: Although serum P16ink4A and FOXP3 concentrations showed moderate accuracy, their combination was more specific than sensitive. This combination has a high potential to be applied for diagnosis rather than screening for cervical lesions, at least in the Ugandan population. Combinations of P16ink4A and FOXP3 with other biomarkers could improve diagnostic accuracies. Additionally, studies could be conducted to assess the performance of these biomarkers in the detection of cervical lesions in specific populations, say Human Immunodeficiency Virus (HIV)‐positive and HIV‐negative populations.

3Papers
19Collaborators
Uterine Cervical NeoplasmsNeoplasmsBreast NeoplasmsBiomarkers, TumorEarly Detection of Cancer

Positions

2011–

Cancer Biology/Molecular Pathology

Uganda Cancer Institute · Research

2010–

Research Assistant

Duke Global Health Institute, Duke University · Global Health

2009–

Clinician

Mulago Hospital · Medicine

Education

2022

Master of Business Administration

ESAMI

2016

Molecular and Cellular Biology

University of Washington · Molecular and Cellular Biology

2012

Global Health

Duke University · Global Health Institute

2009

Medicine

Makerere University College of Health Sciences · College of Health Sciences