1982 …2019

Research output per year

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Research Output

Estimates of maternal mortality worldwide between 1990 and 2005: an assessment of available data

Hill, K., Thomas, K., AbouZahr, C., Walker, N., Say, L., Inoue, M. & Suzuki, E., Oct 13 2007, In : The Lancet. 370, 9595, p. 1311-1319 9 p.

Research output: Contribution to journalArticle

Estimating HIV/AIDS prevalence in countries with low-level and concentrated epidemics: The example of Honduras

Ramón, J. S., Alvarenga, M., Walker, N., Garcia-Calleja, J. M. & Zacarias, F., Dec 1 2002, In : AIDS. 16, SUPPL. 3, p. S18-S22

Research output: Contribution to journalArticle

Estimating lives saved by achieving dietary micronutrient adequacy, with a focus on vitamin A intervention programs in Cameroon

Engle-Stone, R., Perkins, A., Clermont, A., Walker, N., Haskell, M. J., Vosti, S. A. & Brown, K. H., Nov 1 2017, In : Journal of Nutrition. 147, 11, p. 2194S-2203S

Research output: Contribution to journalArticle

Estimating resource needs for HIV/AIDS health care services in low-income and middle-income countries

Bertozzi, S., Gutierrez, J. P., Opuni, M., Walker, N. & Schwartländer, B., Aug 2004, In : Health Policy. 69, 2, p. 189-200 12 p.

Research output: Contribution to journalArticle

Estimating the global burden of HIV/AIDS: What do we really know about the HIV pandemic?

Walker, N., Grassly, N. C., Garnett, G. P., Stanecki, K. A. & Ghys, P. D., Jun 26 2004, In : The Lancet. 363, 9427, p. 2180-2185 6 p.

Research output: Contribution to journalArticle

Estimating the global impact of poor quality of care on maternal and neonatal outcomes in 81 low- and middle-income countries: A modeling study

Chou, V. B., Walker, N. & Kanyangarara, M., Dec 1 2019, In : PLoS medicine. 16, 12, p. e1002990

Research output: Contribution to journalArticle

Open Access

Estimating the herd immunity effect of rotavirus vaccine

Pollard, S., Malpica-Llanos, T., Friberg, I. K., Fischer-Walker, C., Ashraf, S. & Walker, N., Jul 31 2015, In : Vaccine. 33, 32, p. 3795-3800 6 p.

Research output: Contribution to journalArticle

Estimating the impact of interventions on cause-specific maternal mortality: A Delphi approach

Pollard, S., Mathai, M. & Walker, N., 2013, In : BMC Public Health. 13, SUPPL.3, S12.

Research output: Contribution to journalArticle

Estimation of "needs" and "probable uptake" for HIV/AIDS preventive vaccines based on possible policies and likely acceptance (a WHO/UNAIDS/IAVI study)

Esparza, J., Chang, M. L., Widdus, R., Madrid, Y., Walker, N. & Ghys, P. D., May 16 2003, In : Vaccine. 21, 17-18, p. 2032-2041 10 p.

Research output: Contribution to journalArticle

Evaluating the importance of multi-sensory input on memory and the sense of presence in virtual environments

Dinh, H. Q., Walker, N., Hodges, L. F., Song, C. & Kobayashi, A., 1999, Proceedings - Virtual Reality Annual International Symposium. p. 222-228 7 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Evaluation of the CyberGlove as a Whole-Hand Input Device

Kessler, G. D., Hodges, L. F. & Walker, N., Jan 12 1995, In : ACM Transactions on Computer-Human Interaction. 2, 4, p. 263-283 21 p.

Research output: Contribution to journalArticle

Evaluation of the effects of frame time variation on VR task performance

Watson, B., Spaulding, V., Walker, N. & Ribarsky, W., 1997, Proceedings - Virtual Reality Annual International Symposium. Anon (ed.). IEEE, p. 38-44 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Evidence-based, cost-effective interventions: How many newborn babies can we save?

Darmstadt, G. L., Bhutta, Z. A., Cousens, S., Adam, T., Walker, N. & De Bernis, L., Mar 12 2005, In : The Lancet. 365, 9463, p. 977-988 12 p.

Research output: Contribution to journalArticle

Evidence-based interventions for improvement of maternal and child nutrition: What can be done and at what cost?

Bhutta, Z. A., Das, J. K., Rizvi, A., Gaffey, M. F., Walker, N., Horton, S., Webb, P., Lartey, A. & Black, R. E., 2013, In : The Lancet. 382, 9890, p. 452-477 26 p.

Research output: Contribution to journalArticle

Factors associated with the decline in under-five diarrhea mortality in India: a LiST analysis

Choudhary, T. S., Sinha, B., Khera, A., Bhandari, N., Chu, Y., Jackson, B., Walker, N., Black, R. E., Merson, M. & Bhan, M. K., Dec 1 2019, In : Journal of global health. 9, 2, 1 p.

Research output: Contribution to journalArticle

Open Access

Factors associated with the decline in under five diarrhea mortality in Tanzania from 1980-2015

Masanja, H., Mongi, P., Baraka, J., Jackson, B., Kisisiwe, Y., Manji, K., Iriya, N., John, T., Kimatta, S., Walker, N. & Black, R. E., Dec 1 2019, In : Journal of global health. 9, 2, 1 p.

Research output: Contribution to journalArticle

Open Access

Fertility of HIV-infected women: insights from Demographic and Health Surveys.

Chen, W. J. & Walker, N., Dec 2010, In : Sexually Transmitted Infections. 86 Suppl 2

Research output: Contribution to journalArticle

Functional limitations to daily living tasks in the aged: A focus group analysis

Rogers, W. A., Meyer, B., Walker, N. & Fisk, A. D., Mar 1998, In : Human Factors. 40, 1, p. 111-125 15 p.

Research output: Contribution to journalArticle

Gaps in the implementation of antenatal syphilis detection and treatment in health facilities across sub-Saharan Africa

Kanyangarara, M., Walker, N. & Boerma, T., Jun 1 2018, In : PLoS One. 13, 6, e0198622.

Research output: Contribution to journalArticle

Global Burden of Disease 2005: call for collaborators

Murray, C. JL., Lopez, A. D., Black, R. E., Mathers, C. D., Shibuya, K., Ezzati, M., Salomon, J. A., Michaud, C. M., Walker, N. & Vos, T., Jul 14 2007, In : The Lancet. 370, 9582, p. 109-110 2 p.

Research output: Contribution to journalArticle

Growing in silence: selected regions and countries with expanding HIV/AIDS epidemics.

Ghys, P. D., Saidel, T., Vu, H. T., Savtchenko, I., Erasilova, I., Mashologu, Y. S., Indongo, R., Sikhosana, N. & Walker, N., 2003, In : AIDS. 17 Suppl 4

Research output: Contribution to journalArticle

HIV surveillance: A global perspective

Pisani, E., Lazzari, S., Walker, N. & Schwartländer, B., Feb 2003, In : Journal of Acquired Immune Deficiency Syndromes. 32, SUPPL. 1

Research output: Contribution to journalArticle

How within-country inequalities and co-coverage may affect LiST estimates of lives saved by scaling up interventions

Victora, C. G., Barros, A. J. D., Malpica-Llanos, T. & Walker, N., 2013, In : BMC Public Health. 13, SUPPL.3, S24.

Research output: Contribution to journalArticle

Human Factors Goes to the Gridiron

Walker, N. & Fisk, A. D., Jul 1995, In : Ergonomics in Design: The Quarterly of Human Factors Applications. 3, 3, p. 8-13 6 p.

Research output: Contribution to journalArticle

Impacto económico estimado de las vacunas en 73 países con ingresos bajos y medios, 2001-2020

Translated title of the contribution: Estimated economic impact of vaccinations in 73 low- and middleincome countries, 2001–2020Ozawa, S., Clark, S., Portnoy, A., Grewal, S., Stack, M. L., Sinha, A., Mirelman, A., Franklin, H., Friberg, I. K., Tam, Y. O. Y., Walker, N., Clark, A., Ferrari, M., Suraratdecha, C., Sweet, S., Goldie, S. J., Garske, T., Li, M., Hansen, P. M., Johnson, H. L. & 1 others, Walker, D., Sep 1 2017, In : Bulletin of the World Health Organization. 95, 9, p. 629-638 10 p.

Research output: Contribution to journalArticle

Impact of malaria interventions on child mortality in endemic African settings: Comparison and alignment between LiST and Spectrum-Malaria model

Korenromp, E., Hamilton, M., Sanders, R., Mahiané, G., Briët, O. J. T., Smith, T., Winfrey, W., Walker, N. & Stover, J., Nov 7 2017, In : BMC Public Health. 17, 781.

Research output: Contribution to journalArticle

Open Access

Improved data, methods and tools for the 2007 HIV and AIDS estimates and projections

Ghys, P. D., Walker, N., McFarland, W., Miller, R. & Garnett, G. P., Aug 2008, In : Sexually Transmitted Infections. 84, SUPPL. 1

Research output: Contribution to journalArticle

Improved measurement for mothers, newborns and children in the era of the Sustainable Development Goals

Marchant, T., Bryce, J., Victora, C., Moran, A. C., Claeson, M., Requejo, J. H., Amouzou, A., Walker, N., Boerma, T. & Grove, J., 2016, In : Journal of Global Health. 6, 1, 010506.

Research output: Contribution to journalArticle

Improved methods and assumptions for estimation of the HIV/AIDS epidemic and its impact: Recommendations of the UNAIDS Reference Group on estimates, modelling and projections

Artzrouni, M., Brown, T., Feeney, G., Garnett, G., Ghys, P., Grassly, N., Lazzari, S., Schneider, D., Stanecki, K., Stover, J., Schwartländer, B., Walker, N., Way, P., Yan, P., Zaba, B., Zlotnik, H., Boerma, T., Brahmbhatt, H., Calleja, J. M., Chin, J. & 16 others, Coutinho, R., Dabis, F., De Cock, K., Fitzgerald, D., Garnett, G., Gray, R., Kitayaporn, D., Landmann Szwarcwald, C., Morgan, D., Peerpatanapokin, W., Rangsin, R., Reddy, D. K., De Vincenzi, I., Monasch, R., Peeranapatopokin, W. & Timæus, I., Jun 14 2002, In : AIDS. 16, 9, p. W1-W14

Research output: Contribution to journalArticle

Improved plausibility bounds about the 2005 HIV and AIDS estimates

Morgan, M., Walker, N., Gouws, E., Stanecki, K. A. & Stover, J., Jun 2006, In : Sexually Transmitted Infections. 82, SUPPL. III

Research output: Contribution to journalArticle

Improving analysis of the size and dynamics of AIDS epidemics

Ghys, P. D., Walker, N. & Garnett, G. P., Jun 2006, In : Sexually Transmitted Infections. 82, SUPPL. III

Research output: Contribution to journalArticle

Integrating HIV prevention and treatment: From slogans to impact

Salomon, J. A., Hogan, D. R., Stover, J., Stanecki, K. A., Walker, N., Ghys, P. D. & Schwartländer, B., 2005, In : PLoS Medicine. 2, p. 50-56 7 p.

Research output: Contribution to journalArticle

Interpreting declines in HIV prevalence: Impact of spatial aggregation and migration on expected declines in prevalence

Walker, N., Hallett, T. B., White, P. J. & Garnett, G. P., Oct 2008, In : Sexually Transmitted Infections. 84, SUPPL. 2

Research output: Contribution to journalArticle

Interpreting health statistics for policymaking: the story behind the headlines

Walker, N., Bryce, J. & Black, R. E., Mar 17 2007, In : The Lancet. 369, 9565, p. 956-963 8 p.

Research output: Contribution to journalArticle

Interventions to address deaths from childhood pneumonia and diarrhoea equitably: What works and at what cost?

Bhutta, Z. A., Das, J. K., Walker, N., Rizvi, A., Campbell, H., Rudan, I. & Black, R. E., Apr 2013, In : The Lancet. 381, 9875, p. 1417-1429 13 p.

Research output: Contribution to journalArticle

Introduction: Reporting on updates in the scientific basis for the Lives Saved Tool (LiST)

Walker, N. & Friberg, I. K., Nov 7 2017, In : BMC Public Health. 17, 774.

Research output: Contribution to journalReview article

Knowledge versus Execution in Dynamic Judgment Tasks

Bisantz, A. M., Kirlik, A., Walker, N., Fisk, A. D., Gay, P. & Phipps, D., Mar 22 2012, Adaptive Perspectives on Human-Technology Interaction: Methods and Models for Cognitive Engineering and Human-Computer Interaction. Oxford University Press

Research output: Chapter in Book/Report/Conference proceedingChapter

Life experiences, response styles and mental health among mothers and children in Beirut, Lebanon

Bryce, J., Walker, N., Ghorayeb, F. & Kanj, M., 1989, In : Social Science and Medicine. 28, 7, p. 685-695 11 p.

Research output: Contribution to journalArticle

LiST as a catalyst in program planning: Experiences from Burkina Faso, Ghana and Malawi

Bryce, J., Friberg, I. K., Kraushaar, D., Nsona, H., Afenyadu, G. Y., Nare, N., Kyei-Faried, S. & Walker, N., Apr 1 2010, In : International Journal of Epidemiology. 39, SUPPL. 1

Research output: Contribution to journalArticle

Maintaining usability during 3D placement despite delay

Watson, B., Walker, N., Woytiuk, P. & Ribarsky, W., 2003, Proceedings - IEEE Virtual Reality. IEEE Computer Society, Vol. 2003-January. p. 133-140 8 p. 1191131

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Making computers easier for older adults to use: Area cursors and sticky icons

Worden, A., Walker, N., Bharat, K. & Hudson, S., 1997, Conference on Human Factors in Computing Systems - Proceedings. Pemberton, S. (ed.). ACM, p. 266-271 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Malawi and Millennium Development Goal 4: A Countdown to 2015 country case study

Kanyuka, M., Ndawala, J., Mleme, T., Chisesa, L., Makwemba, M., Amouzou, A., Borghi, J., Daire, J., Ferrabee, R., Hazel, E., Heidkamp, R., Hill, K., Álvarez, M. M., Mgalula, L., Munthali, S., Nambiar, B., Nsona, H., Park, L., Walker, N., Daelmans, B. & 2 others, Bryce, J. & Colbourn, T., Mar 1 2016, In : The Lancet Global Health. 4, 3, p. e201-e214

Research output: Contribution to journalArticle

Managing level of detail in virtual environments: A perceptual framework

Reddy, M., Watson, B., Walker, N. & Hodges, L. F., Jan 1 1997, In : Presence: Teleoperators and Virtual Environments. 6, 6, p. 658-666 9 p.

Research output: Contribution to journalReview article

Managing level of detail through head-tracked peripheral degradation: A model and resulting design principles

Watson, B., Walker, N. & Hodges, L. F., 1997, ACM Symposium on Virtual Reality Software and Technology, Proceedings, VRST. Anon (ed.). ACM, p. 59-63 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Managing Level of Detail through Peripheral Degradation

Watson, B., Walker, N., Hodges, L. F. & Worden, A., Dec 1 1997, In : ACM Transactions on Computer-Human Interaction. 4, 4, p. 323-346 24 p.

Research output: Contribution to journalArticle