Research outputs
Selected research outputs
- Innovative approach to improve information accuracy in a two-district cross-sectional study in Bihar, India (Journal article - 2022)
- Is development aid to strengthen health systems during protracted conflict a useful investment? The case of South Sudan, 2011-2015 (Journal article - 2020)
- Combining national survey with facility-based HIV testing data to obtain more accurate estimate of HIV prevalence in districts in Uganda (Journal article - 2020)
- Hybrid prevalence estimation: Method to improve intervention coverage estimations (Journal article - 2018)
- Assessing delivery practices of mothers over time and over space in Uganda, 2003-2012 (Journal article - 2016)
- Comparing two survey methods of measuring health-related indicators: Lot Quality Assurance Sampling and Demographic Health Surveys (Journal article - 2015)
- Putting the C Back into the ABCs: A Multi-Year, Multi-Region Investigation of Condom Use by Ugandan Youths 2003-2010 (Journal article - 2014)
- The effect of spatial aggregation on performance when mapping a risk of disease (Journal article - 2014)
- Distance-Based Mapping of Disease Risk (Journal article - 2013)
2026
Learning from the outliers: A longitudinal ecological study of social and spatial inequalities in older adult influenza vaccination and hospitalisation (Cheshire and Merseyside, UK, 2018-19 to 2023-24)
Green, M. A., Jeffery, C., Cheyne, C., Bonnett, L., Garcia-Finana, M., Hughes, D. M., . . . Hungerford, D. (2026). Learning from the outliers: A longitudinal ecological study of social and spatial inequalities in older adult influenza vaccination and hospitalisation (Cheshire and Merseyside, UK, 2018-19 to 2023-24). VACCINE, 77, 7 pages. doi:10.1016/j.vaccine.2026.128356
2025
Effect of influenza vaccination on post-admission outcomes for influenza patients in England: a population-based cohort study
Jeffery, C., Cheyne, C. P., Buchan, I., Garcia-Finana, M., Green, M. A., Bonnett, L., . . . Hungerford, D. (2025). Effect of influenza vaccination on post-admission outcomes for influenza patients in England: a population-based cohort study. VACCINE, 68, 8 pages. doi:10.1016/j.vaccine.2025.127933
Prevalence, locations and predictors of attitudes accepting both intimate partner violence and additional forms of violence against women and girls in South Sudan: a geospatial analysis
Lamadrid, A., Leiva-Escobar, I., Jeffery, C., Anguyo, R. J., Lako, R., & Valadez, J. J. (2025). Prevalence, locations and predictors of attitudes accepting both intimate partner violence and additional forms of violence against women and girls in South Sudan: a geospatial analysis. PLOS GLOBAL PUBLIC HEALTH, 5(4), 18 pages. doi:10.1371/journal.pgph.0004144
2024
Assessing attitudes towards violence against women and girls, their determinants and health-seeking behaviour among women and men in South Sudan: a cross-sectional national survey
Lamadrid, A., Jeffery, C., Anguyo, R., Devkota, B., Lako, R., & Valadez, J. J. (2024). Assessing attitudes towards violence against women and girls, their determinants and health-seeking behaviour among women and men in South Sudan: a cross-sectional national survey. BMJ OPEN, 14(6), 10 pages. doi:10.1136/bmjopen-2023-080022
Ultrasonographic assessment of spleen size and pattern of change among sickle cell disease patients and healthy controls in North-Eastern Nigeria
Ladu, A. I., Jeffery, C., Farate, A., Farouk, A. G., Abulfathi, F. M., Adekile, A., & Bates, I. (2024). Ultrasonographic assessment of spleen size and pattern of change among sickle cell disease patients and healthy controls in North-Eastern Nigeria. Ultrasound. doi:10.1177/1742271x241241778
Malaria Infection in Patients with Sickle Cell Disease in Nigeria: Association with Markers of Hyposplenism.
Ladu, A. I., Kadaura, M. U., Dauda, M., Baba, A. S., Zango, N. G., Jeffery, C., . . . Bates, I. (2024). Malaria Infection in Patients with Sickle Cell Disease in Nigeria: Association with Markers of Hyposplenism.. Hemoglobin, 1-9. doi:10.1080/03630269.2023.2285881
2023
How to improve research capacity strengthening efforts: learning from the monitoring and evaluation of four research consortia in Africa
Kasprowicz, V. O., Jeffery, C., Mbuvi, D., Bukirwa, V., Ouattara, K., Kirimi, F., . . . Ndung'u, T. (2023). How to improve research capacity strengthening efforts: learning from the monitoring and evaluation of four research consortia in Africa. HEALTH RESEARCH POLICY AND SYSTEMS, 21(1), 18 pages. doi:10.1186/s12961-023-01056-9
Integrated management of HIV, diabetes, and hypertension in sub-Saharan Africa (INTE-AFRICA): a pragmatic cluster-randomised, controlled trial.
Kivuyo, S., Birungi, J., Okebe, J., Wang, D., Ramaiya, K., Ainan, S., . . . RESPOND-AFRICA Group. (2023). Integrated management of HIV, diabetes, and hypertension in sub-Saharan Africa (INTE-AFRICA): a pragmatic cluster-randomised, controlled trial.. Lancet (London, England), 402(10409), 1241-1250. doi:10.1016/s0140-6736(23)01573-8
Bacteraemia Among Patients with Sickle Cell Disease in Nigeria: Association with Spleen Size and Function
Ladu, A. I., Kadaura, M. U., Dauda, M., Baba, A. S., Jeffery, C., Farate, A., . . . Dacombe, R. (2023). Bacteraemia Among Patients with Sickle Cell Disease in Nigeria: Association with Spleen Size and Function. MEDITERRANEAN JOURNAL OF HEMATOLOGY AND INFECTIOUS DISEASES, 15(1), 4 pages. doi:10.4084/MJHID.2023.054
Clinical and laboratory factors associated with splenic dysfunction among patients with sickle cell disease in a malaria endemic region.
Ladu, A. I., Satumari, N. A., Abba, A. M., Abulfathi, F. A., Jeffery, C., Adekile, A., & Bates, I. (2023). Clinical and laboratory factors associated with splenic dysfunction among patients with sickle cell disease in a malaria endemic region.. Transactions of the Royal Society of Tropical Medicine and Hygiene, trad059. doi:10.1093/trstmh/trad059
Determinants of splenic preservation among patients with sickle cell disease in North-Eastern Nigeria
Ladu, A. I., Jeffery, C., Farate, A., Farouk, A. G., Abba, A. M., Adekile, A., & Bates, I. (2023). Determinants of splenic preservation among patients with sickle cell disease in North-Eastern Nigeria. TROPICAL MEDICINE & INTERNATIONAL HEALTH, 28(8), 620-628. doi:10.1111/tmi.13910
Evaluation of two red cell inclusion staining methods for assessing spleen function among sickle cell disease patients in North-East Nigeria
Ladu, A. I., Satumari, N. A., Abba, A. M., Abulfathi, F. A., Jeffery, C., Adekile, A., & Bates, I. (2023). Evaluation of two red cell inclusion staining methods for assessing spleen function among sickle cell disease patients in North-East Nigeria. PLOS GLOBAL PUBLIC HEALTH, 3(5), 17 pages. doi:10.1371/journal.pgph.0001552
Malaria Infection in Patients with Sickle Cell Disease in Nigeria: Association with Markers of Hyposplenism
Clinical and laboratory factors associated with splenic dysfunction among sickle cell disease patients
Ladu, A. I., Satumari, N. A., Abba, A. M., Abulfathi, F. A., Jeffery, C., Adekunle, A., & Bates, I. (2023). Clinical and laboratory factors associated with splenic dysfunction among sickle cell disease patients. In BRITISH JOURNAL OF HAEMATOLOGY Vol. 201 (pp. 124-125). Retrieved from https://www.webofscience.com/
Determinants of splenic preservation among patients with sickle cell disease in North-Eastern Nigeria
Ladu, A. I., Jeffery, C., Farate, A., Farouk, A. G., Abba, A. M., Adekunle, A., & Bates, I. (2023). Determinants of splenic preservation among patients with sickle cell disease in North-Eastern Nigeria. In BRITISH JOURNAL OF HAEMATOLOGY Vol. 201 (pp. 38-39). Retrieved from https://www.webofscience.com/
Evaluation of red cell inclusions for assessing spleen function among sickle cell disease patients
Ladu, A. I., Satumari, N. A., Abba, A. M., Abulfathi, F. A., Jeffery, C., Adekile, A., & Bates, I. (2023). Evaluation of red cell inclusions for assessing spleen function among sickle cell disease patients. In BRITISH JOURNAL OF HAEMATOLOGY Vol. 201 (pp. 125). Retrieved from https://www.webofscience.com/
2022
Innovative approach to improve information accuracy in a two-district cross-sectional study in Bihar, India
Jeffery, C., Pagano, M., Devkota, B., & Valadez, J. J. (2022). Innovative approach to improve information accuracy in a two-district cross-sectional study in Bihar, India. BMJ OPEN, 12(1), 12 pages. doi:10.1136/bmjopen-2021-051427
2021
Model-based small area estimation methods and precise district-level HIV prevalence estimates in Uganda
Ouma, J., Jeffery, C., Awor, C. A., Muruta, A., Musinguzi, J., Wanyenze, R. K., . . . Valadez, J. J. (2021). Model-based small area estimation methods and precise district-level HIV prevalence estimates in Uganda. PLOS ONE, 16(8), 15 pages. doi:10.1371/journal.pone.0253375
Difference in HIV prevalence by testing venue: results from population level survey in Uganda
Ouma, J., Jeffery, C., Valadez, J. J., Wanyenze, R. K., Todd, J., & Levin, J. (2021). Difference in HIV prevalence by testing venue: results from population level survey in Uganda. AIDS CARE-PSYCHOLOGICAL AND SOCIO-MEDICAL ASPECTS OF AIDS/HIV, 33(3), 273-284. doi:10.1080/09540121.2020.1734179
2020
Is development aid to strengthen health systems during protracted conflict a useful investment? The case of South Sudan, 2011-2015
Valadez, J. J., Berendes, S., Odhiambo, J., Vargas, W., Deykota, B., Lako, R., & Jeffery, C. (2020). Is development aid to strengthen health systems during protracted conflict a useful investment? The case of South Sudan, 2011-2015. BMJ GLOBAL HEALTH, 5(4), 15 pages. doi:10.1136/bmjgh-2019-002093
Measuring health system resilience in a highly fragile nation during protracted conflict: South Sudan 2011-15
Odhiambo, J., Jeffery, C., Lako, R. L., Devkota, B., & Valadez, J. J. (2020). Measuring health system resilience in a highly fragile nation during protracted conflict: South Sudan 2011-15. HEALTH POLICY AND PLANNING, 35(3), 313-322. doi:10.1093/heapol/czz160
Combining national survey with facility-based HIV testing data to obtain more accurate estimate of HIV prevalence in districts in Uganda
Ouma, J., Jeffery, C., Valadez, J. J., Wanyenze, R. K., Todd, J., & Levin, J. (2020). Combining national survey with facility-based HIV testing data to obtain more accurate estimate of HIV prevalence in districts in Uganda. BMC PUBLIC HEALTH, 20(1), 14 pages. doi:10.1186/s12889-020-8436-z
2019
How well do mothers recall their own and their infants' perinatal events? A two-district study using cross-sectional stratified random sampling in Bihar, India
Valadez, J. J., Devkota, B., Jeffery, C., & Hadden, W. C. (2019). How well do mothers recall their own and their infants' perinatal events? A two-district study using cross-sectional stratified random sampling in Bihar, India. BMJ OPEN, 9(12), 7 pages. doi:10.1136/bmjopen-2019-031289
Improved assessment of mass drug administration and health district management performance to eliminate lymphatic filariasis
Maroto-Camino, C., Hernandez-Pastor, P., Awaca, N., Safari, L., Hemingway, J., Massangaie, M., . . . Valadez, J. J. (2019). Improved assessment of mass drug administration and health district management performance to eliminate lymphatic filariasis. PLOS NEGLECTED TROPICAL DISEASES, 13(7), 14 pages. doi:10.1371/journal.pntd.0007337
2018
Hybrid prevalence estimation: Method to improve intervention coverage estimations
Jeffery, C., Pagano, M., Hemingway, J., & Valadez, J. J. (2018). Hybrid prevalence estimation: Method to improve intervention coverage estimations. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 115(51), 13063-13068. doi:10.1073/pnas.1810287115
Does test-based prescription of evidence-based treatment for malaria improve treatment seeking and satisfaction? Findings of repeated cross-sectional surveys in Papua New Guinea
Pulford, J., Saweri, O. P. M., Jeffery, C., Siba, P. M., Mueller, N., & Hetzel, M. W. (2018). Does test-based prescription of evidence-based treatment for malaria improve treatment seeking and satisfaction? Findings of repeated cross-sectional surveys in Papua New Guinea. BMJ GLOBAL HEALTH, 3(6), 8 pages. doi:10.1136/bmjgh-2018-000915
2016
Assessing delivery practices of mothers over time and over space in Uganda, 2003-2012
Sprague, D. A., Jeffery, C., Crossland, N., House, T., Roberts, G. O., Vargas, W., . . . Valadez, J. J. (2016). Assessing delivery practices of mothers over time and over space in Uganda, 2003-2012. EMERGING THEMES IN EPIDEMIOLOGY, 13. doi:10.1186/s12982-016-0049-8
Associations with HIV testing in Uganda: an analysis of the Lot Quality Assurance Sampling database 2003-2012
Jeffery, C., Beckworth, C., Hadden, W. C., Ouma, J., Lwanga, S. K., & Valadez, J. J. (2016). Associations with HIV testing in Uganda: an analysis of the Lot Quality Assurance Sampling database 2003-2012. AIDS CARE-PSYCHOLOGICAL AND SOCIO-MEDICAL ASPECTS OF AIDS/HIV, 28(4), 519-523. doi:10.1080/09540121.2015.1112350
2015
Comparing two survey methods of measuring health-related indicators: Lot Quality Assurance Sampling and Demographic Health Surveys
Anoke, S. C., Mwai, P., Jeffery, C., Valadez, J. J., & Pagano, M. (2015). Comparing two survey methods of measuring health-related indicators: Lot Quality Assurance Sampling and Demographic Health Surveys. TROPICAL MEDICINE & INTERNATIONAL HEALTH, 20(12), 1756-1770. doi:10.1111/tmi.12605
Sexual and Reproductive Health Among Ugandan Youth: 2003-04 to 2012
Crossland, N., Hadden, W. C., Vargas, W. E., Valadez, J. J., & Jeffery, C. (2015). Sexual and Reproductive Health Among Ugandan Youth: 2003-04 to 2012. JOURNAL OF ADOLESCENT HEALTH, 57(4), 393-398. doi:10.1016/j.jadohealth.2015.06.015
Access to Education for Orphans and Vulnerable Children in Uganda: A Multi-District, Cross-Sectional Study Using Lot Quality Assurance Sampling from 2011 to 2013
Olanrewaju, A. D., Jeffery, C., Crossland, N., & Valadez, J. J. (2015). Access to Education for Orphans and Vulnerable Children in Uganda: A Multi-District, Cross-Sectional Study Using Lot Quality Assurance Sampling from 2011 to 2013. PLOS ONE, 10(7), 10 pages. doi:10.1371/journal.pone.0132905
Attracting female sex workers to HIV testing and counselling in Ethiopia: a qualitative study with sex workers in Addis Ababa
Ameyan, W., Jeffery, C., Negash, K., Biruk, E., & Taegtmeyer, M. (2015). Attracting female sex workers to HIV testing and counselling in Ethiopia: a qualitative study with sex workers in Addis Ababa. AJAR-AFRICAN JOURNAL OF AIDS RESEARCH, 14(2), 137-144. doi:10.2989/16085906.2015.1040809
2014
Putting the C Back into the ABCs: A Multi-Year, Multi-Region Investigation of Condom Use by Ugandan Youths 2003-2010
Valadez, J. J., Jeffery, C., Davis, R., Ouma, J., Lwanga, S. K., & Moxon, S. (2014). Putting the C Back into the ABCs: A Multi-Year, Multi-Region Investigation of Condom Use by Ugandan Youths 2003-2010. PLOS ONE, 9(4), 9 pages. doi:10.1371/journal.pone.0093083
The effect of spatial aggregation on performance when mapping a risk of disease
Jeffery, C., Ozonoff, A., & Pagano, M. (2014). The effect of spatial aggregation on performance when mapping a risk of disease. INTERNATIONAL JOURNAL OF HEALTH GEOGRAPHICS, 13, 9 pages. doi:10.1186/1476-072X-13-9
2013
FILLING THE KNOWLEDGE GAP: MEASURING HIV PREVALENCE AND RISK FACTORS AMONG POPULATIONS MOST VULNERABLE TO HIV IN LIBYA
Valadez, J. J., Berendes, S., Jeffery, C., Thomson, J., Ben Othman, H., Moxon, S., . . . Mirzoyan, L. (2013). FILLING THE KNOWLEDGE GAP: MEASURING HIV PREVALENCE AND RISK FACTORS AMONG POPULATIONS MOST VULNERABLE TO HIV IN LIBYA. SEXUALLY TRANSMITTED INFECTIONS, 89, A178. doi:10.1136/sextrans-2013-051184.0559
Filling the Knowledge Gap: Measuring HIV Prevalence and Risk Factors among Men Who Have Sex with Men and Female Sex Workers in Tripoli, Libya
Valadez, J. J., Berendes, S., Jeffery, C., Thomson, J., Ben Othman, H., Danon, L., . . . Mirzoyan, L. (2013). Filling the Knowledge Gap: Measuring HIV Prevalence and Risk Factors among Men Who Have Sex with Men and Female Sex Workers in Tripoli, Libya. PLOS ONE, 8(6), 14 pages. doi:10.1371/journal.pone.0066701
New Evidence on the HIV Epidemic in Libya: Why Countries Must Implement Prevention Programs Among People Who Inject Drugs
Mirzoyan, L., Berendes, S., Jeffery, C., Thomson, J., Ben Othman, H., Danon, L., . . . Valadez, J. J. (2013). New Evidence on the HIV Epidemic in Libya: Why Countries Must Implement Prevention Programs Among People Who Inject Drugs. JAIDS-JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES, 62(5), 577-583. doi:10.1097/QAI.0b013e318284714a
Disease Mapping with Spatially Uncertain Data
Manjourides, J., Cohen, T., Jeffery, C., & Pagano, M. (2013). Disease Mapping with Spatially Uncertain Data. Online Journal of Public Health Informatics, 5(1). doi:10.5210/ojphi.v5i1.4380
Distance-Based Mapping of Disease Risk
Jeffery, C., Ozonoff, A., White, L. F., & Pagano, M. (2013). Distance-Based Mapping of Disease Risk. INTERNATIONAL JOURNAL OF BIOSTATISTICS, 9(2), 265-290. doi:10.1515/ijb-2012-0024
2012
Re: Supporting health systems for tuberculosis through research
Cohen, T., Lin, H. -H., Shin, S., Jeffery, C., Contreras, C., Santa Cruz, J., . . . Manjourides, J. (2012). Re: Supporting health systems for tuberculosis through research. TUBERCULOSIS, 92(4), 290. doi:10.1016/j.tube.2012.04.001
Identifying multidrug resistant tuberculosis transmission hotspots using routinely collected data
Manjourides, J., Lin, H. -H., Shin, S., Jeffery, C., Contreras, C., Santa Cruz, J., . . . Cohen, T. (2012). Identifying multidrug resistant tuberculosis transmission hotspots using routinely collected data. TUBERCULOSIS, 92(3), 273-279. doi:10.1016/j.tube.2012.02.003
2009
Power to Detect Spatial Disturbances under Different Levels of Geographic Aggregation
Jeffery, C., Ozonoff, A., White, L. F., Nuno, M., & Pagano, M. (2009). Power to Detect Spatial Disturbances under Different Levels of Geographic Aggregation. JOURNAL OF THE AMERICAN MEDICAL INFORMATICS ASSOCIATION, 16(6), 847-854. doi:10.1197/jamia.M2788
2007
Effect of spatial resolution on cluster detection: a simulation study
Ozonoff, A., Jeffery, C., Manjourides, J., White, L. F., & Pagano, M. (2007). Effect of spatial resolution on cluster detection: a simulation study. INTERNATIONAL JOURNAL OF HEALTH GEOGRAPHICS, 6, 7 pages. doi:10.1186/1476-072X-6-52
2006
A spatiotemporal analysis of syndromic data for biosurveillance
Forsberg, L., Jeffery, C., Ozonoff, A., & Pagano, M. (2006). A spatiotemporal analysis of syndromic data for biosurveillance. In Statistical Methods in Counterterrorism Game Theory Modeling Syndromic Surveillance and Biometric Authentication (pp. 173-191). doi:10.1007/0-387-35209-0_10
2005
Distance-Based Methods for Spatial and Spatio-temporal Surveillance
Forsberg, L., Bonetti, M., Jeffery, C., Ozonoff, A., & Pagano, M. (2005). Distance-Based Methods for Spatial and Spatio-temporal Surveillance. In SPATIAL AND SYNDROMIC SURVEILLANCE FOR PUBLIC HEALTH (pp. 133-152). doi:10.1002/0470092505.ch8