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Professor Anna Ranta, Head of Department of Medicine

Profile_Anna_Ranta MD, PhD, FRACP

Positions

  • Head of Department, Medicine
  • Professor, Department of Medicine, University of Otago, Wellington
  • Consultant Neurologist, CCDHB
  • National Clinical Leaders, Stroke (Ministry of Health)
  • Stroke Lead, CCDHB
  • Stroke Lead, Central Region

Contact details

Department of Medicine
University of Otago Wellington
PO Box 7343
Wellington 6242
New Zealand

Tel +64 4 806 1031
Email anna.ranta@otago.ac.nz

Research Expertise and Interest

  • Stroke (TIA, reperfusion, telestroke, to a lesser degree stroke rehabilitation)
  • Use of Registries and Health administrative data
  • Health Service Delivery Research
  • Health Economics
  • Neuroepidemiology and workforce

Associate Professor Ranta is interested in supervising postgraduate students in any of the research areas listed above. You can contact her directly.

Current Projects

Associate Professor Ranta is the PI of the ongoing REGIONS Care Study. This is a nationwide HRC funded project (HRC 17/037 -$1.2 million)) that incorporates a stroke audit of NZ stroke services (acute and rehabilitation) and extended 1-year follow-up and data linkage with administrative data and focus groups to explore ethnic and geographic inequities in stroke care access and outcomes. The results of this project will advise future NZ stroke strategy to achieve the best outcomes for people with stroke.

She is also the co-PI for the B-SAFE Clinical Trial. This is a nationwide HRC funded project (HRC 16/330) looking at the impact of electronic decision support and the use of cardiac biomarkers on appropriate anticoagulation and patient outcomes. This study is specifically looking at patients with atrial fibrillation managed in primary care.

She is a named investigator for the Take Charge after Stroke. This is a nationwide HRC funded project (HRC 15/297) looking at the impact of motivational interviewing following stroke on stroke outcomes. Role on project: Co-investigator

Other ongoing project topics include telestroke, secondary prevention following TIA, blood pressure optimisation following stroke, epidemiology of genetic muscle disorders, international collaboration in neuro and stroke epidemiology (GBD), and international stroke service provision (Lancet Commission for Stroke).

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Publications

Nogueira, R., Qureshi, M. M., Abdalkader, M., Martins, S. O., Yamagami, H., Qiu, Z., … Ranta, A., … Wu, T. Y.-H., … on behalf of the SVIN COVID-19 Global Stroke Registry. (2021). Global impact of COVID-19 on stroke care and IV thrombolysis. Neurology, 96(23), e2824-e2838. doi: 10.1212/wnl.0000000000011885

Jones, K. M., Anand, A., Bright, C., O'Grady, G., Rodrigues, M. J., Ranta, A., … on behalf of the MD-PREV study group. (2021). Coping in children and adolescents with a genetic muscle disorder: Findings from a population-based study. Journal of Neuromuscular Diseases. Advance online publication. doi: 10.3233/jnd-200564

Balabanski, A. H., Dos Santos, A., Woods, J. A., Thrift, A. G., Kleinig, T. J., Suchy-Dicey, A., … Ranta, A., … Katzenellenbogen, J. M. (2021). The incidence of stroke in indigenous populations of countries with a very high human development index: A systematic review protocol. Frontiers in Neurology, 12, 661570. doi: 10.3389/fneur.2021.661570

Shahjouei, S., Tsivgoulis, G., Farahmand, G., Koza, E., Mowla, A., Sadr, A. V., … Ranta, A., Punter, M., … Zand, R. (2021). SARS-CoV-2 and stroke characteristics: A report from the multinational COVID-19 stroke study group. Stroke, 52, e117. doi: 10.1161/strokeaha.120.032927

McNaughton, H., Weatherall, M., McPherson, K., Fu, V., Taylor, W. J., McRae, A., Thomson, T., … Harwood, M., Ranta, A., Hanger, C., & Riley, J. (2021). The effect of the Take Charge intervention on mood, motivation, activation and risk factor management: Analysis of secondary data from the Taking Charge after Stroke (TaCAS) trial. Clinical Rehabilitation. Advance online publication. doi: 10.1177/0269215521993648

Jones, K. M., Anand, A., Bright, C., O'Grady, G., Rodrigues, M. J., Ranta, A., … on behalf of the MD-PREV study group. (2021). Coping in children and adolescents with a genetic muscle disorder: Findings from a population-based study. Journal of Neuromuscular Diseases. Advance online publication. doi: 10.3233/jnd-200564

Journal - Research Article

McNaughton, H., Weatherall, M., McPherson, K., Fu, V., Taylor, W. J., McRae, A., Thomson, T., … Harwood, M., Ranta, A., Hanger, C., & Riley, J. (2021). The effect of the Take Charge intervention on mood, motivation, activation and risk factor management: Analysis of secondary data from the Taking Charge after Stroke (TaCAS) trial. Clinical Rehabilitation. Advance online publication. doi: 10.1177/0269215521993648

Journal - Research Article

Nogueira, R., Qureshi, M. M., Abdalkader, M., Martins, S. O., Yamagami, H., Qiu, Z., … Ranta, A., … Wu, T. Y.-H., … on behalf of the SVIN COVID-19 Global Stroke Registry. (2021). Global impact of COVID-19 on stroke care and IV thrombolysis. Neurology, 96(23), e2824-e2838. doi: 10.1212/wnl.0000000000011885

Journal - Research Article

Shahjouei, S., Tsivgoulis, G., Farahmand, G., Koza, E., Mowla, A., Sadr, A. V., … Ranta, A., Punter, M., … Zand, R. (2021). SARS-CoV-2 and stroke characteristics: A report from the multinational COVID-19 stroke study group. Stroke, 52, e117. doi: 10.1161/strokeaha.120.032927

Journal - Research Article

Barber, P. A., Wu, T. Y., & Ranta, A. (2020). Stroke reperfusion therapy following dabigatran reversal with idarucizumab in a national cohort. Neurology, 94, e1968-e1972. doi: 10.1212/wnl.0000000000009155

Journal - Research Article

Cadilhac, D. A., Bagot, K. L., Demaerschalk, B. M., Hubert, G., Schwamm, L., Watkins, C. L., … Ranta, A., … Bladin, C. F. (2020). Establishment of an internationally agreed minimum data set for acute telestroke. Journal of Telemedicine & Telecare. Advance online publication. doi: 10.1177/1357633X19899262

Journal - Research Article

Cadilhac, D. A., Kim, J., Wilson, A., Berge, E., Patel, A., Ali, M., … Ranta, A., … on behalf of the ESO Health Economics Working group. (2020). Improving economic evaluations in stroke: A report from the ESO Health Economics Working Group. European Stroke Journal, 5(2), 184-192. doi: 10.1177/2396987319897466

Journal - Research Article

Fu, V., Weatherall, M., McPherson, K., Taylor, W., McRae, A., Thomson, T., … Harwood, M., Ranta, A., Hanger, C., … McNaughton, H. (2020). Taking charge after stroke: A randomized controlled trial of a person-centered, self-directed rehabilitation intervention. International Journal of Stroke, 15(9), 954-964. doi: 10.1177/1747493020915144

Journal - Research Article

Ghoreishi, A., Arsang-Jang, S., Sabaa-Ayoun, Z., Yassi, N., Sylaja, P. N., Akbari, Y., … Ranta, A., … Azrapazhooh, M. R. (2020). Stroke care trends during COVID-19 pandemic in Zanjan Province, Iran. From the CASCADE Initiative: Statistical analysis plan and preliminary results. Journal of Stroke & Cerebrovascular Diseases. Advance online publication. doi: 10.1016/j.jstrokecerebrovasdis.2020.105321

Journal - Research Article

Hedlund, F., Leighs, A., Barber, P. A., Lundström, E., Wu, T. Y., & Ranta, A. (2020). Trends in stroke reperfusion treatment and outcomes in New Zealand. Internal Medicine Journal, 50, 1367-1372. doi: 10.1111/imj.14682

Journal - Research Article

Huang, L., Bourke, D., & Ranta, A. (2020). The impact of an online adult headache guideline on headache referrals to neurology clinic. Internal Medicine Journal. Advance online publication. doi: 10.1111/imj.14959

Journal - Research Article

Kao, A., Lanford, J., Wong, L.-K., & Ranta, A. (2020). Do clinical nurse specialist led stroke follow-up clinics reduce post-stroke hospital readmissions and recurrent vascular events? Internal Medicine Journal, 50, 1202-1207. doi: 10.1111/imj.14707

Journal - Research Article

Lim, A., Singhal, S., Lavallee, P., Amarenco, P., Rothwell, P. M., Albers, G., … Ranta, A., … Phan, T. (2020). An international report on the adaptations of rapid transient ischaemic attack pathways during the COVID-19 pandemic. Journal of Stroke & Cerebrovascular Diseases, 29(11), 105228. doi: 10.1016/j.jstrokecerebrovasdis.2020.105228

Journal - Research Article

Samuels, I., Wang, M. T. M., Chong, K. P., Davis, A., Ranta, A., Barber, P. A., on behalf of the Northern Region Stroke Network. (2020). Ethnic differences in access to stroke reperfusion therapy in Northern New Zealand. Neuroepidemiology, 54, 427-431. doi: 10.1159/000510505

Journal - Research Article

Shahjouei, S., Naderi, S., Li, J., Khan, A., Chaudhary, D., Farahmand, G., … Ranta, A., Punter, M., … Zand, R. (2020). Risk of stroke in hospitalized SARS-CoV-2 infected patients: A multinational study. EBioMedicine, 59, 102939. doi: 10.1016/j.ebiom.2020.102939

Journal - Research Article

Thompson, S., Barber, P. A., Fink, J., Gommans, J., Davis, A., Harwood, M., Douwes, J., … McNaughton, H., … Wilson, A., Denison, H., … Levack, W., & Ranta, A. (2020). New Zealand hospital stroke service provision. New Zealand Medical Journal, 133(1526), 18-30. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

GBD 2015 Neurological Disorders Collaborator Group, including Poulton, R. G., & Ranta, A. (2019). Global, regional, and national burden of neurological disorders, 1990–2016: A systematic analysis for the Global Burden of Disease Study 2016. Lancet Neurology, 18(5), 459-480. doi: 10.1016/s1474-4422(17)30299-5

Journal - Research Article

Global Burden of Disease Health Financing Collaborator Network, including Ranta, A. (2019). Past, present, and future of global health financing: A review of development assistance, government, out-of-pocket, and other private spending on health for 195 countries, 1995-2050. Lancet, 393(10187), 2233-2260. doi: 10.1016/s0140-6736(19)30841-4

Journal - Research Article

Godolphin, P. J., Bath, P. M., Algra, A., Berge, E., Brown, M. M., Chalmers, J., … Ranta, A., … and on behalf of the Adjudicating Outcomes in Stroke Trials Collaboration. (2019). Outcome assessment by central adjudicators versus site investigators in stroke trials: A systematic review and meta-analysis. Stroke, 50(8), 2187-2196. doi: 10.1161/strokeaha.119.025019

Journal - Research Article

Gordon, C., Campbell, R., & Ranta, A. (2019). Impact of the national public 'FAST' campaigns. New Zealand Medical Journal, 132(1507), 48-56. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Theadom, A., Rodrigues, M., Poke, G., O'Grady, G., Love, D., Hammond-Tooke, G., … Ranta, A., … On Behalf of the MDPrev Research Group. (2019). A nationwide, population-based prevalence study of genetic muscle disorders. Neuroepidemiology, 52, 128-135. doi: 10.1159/000494115

Journal - Research Article

Thompson, S., Ranta, A., Porter, K., & Bondi, N. (2019). How much rehabilitation are our patients with stroke receiving? New Zealand Medical Journal, 132(1499), 49-55. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Bath, P. M., Woodhouse, L. J., Appleton, J. P., Beridze, M., Christensen, H., Dineen, R. A., … Ranta, A., … Sprigg, N. (2018). Triple versus guideline antiplatelet therapy to prevent recurrence after acute ischaemic stroke or transient ischaemic attack: The TARDIS RCT. Health Technology Assessment, 22(48), 1-76. doi: 10.3310/hta22480

Journal - Research Article

Bath, P. M., Woodhouse, L. J., Appleton, J. P., Beridze, M., Christensen, H., Dineen, R. A., … Ranta, A., … for the TARDIS Investigators. (2018). Antiplatelet therapy with aspirin, clopidogrel, and dipyridamole versus clopidogrel alone or aspirin and dipyridamole in patients with acute cerebral ischaemia (TARDIS): A randomised, open-label, phase 3 superiority trial. Lancet, 391(10), 850-859. doi: 10.1016/S0140-6736(17)32849-0

Journal - Research Article

GBD 2016 Headache Collaborators, including Ranta, A. (2018). Global, regional, and national burden of migraine and tension-type headache, 1990-2016: A systematic analysis for the Global Burden of Disease Study 2016. Lancet Neurology, 17(11), 954-976. doi: 10.1016/s1474-4422(18)30322-3

Journal - Research Article

GBD 2017 Disease and Injury Incidence and Prevalence Collaborators, including Crump, J. A., & Ranta, A. (2018). Global, regional, and national incidence, prevalence, and years lived with disability for 354 diseases and injuries for 195 countries and territories, 1990-2017: A systematic analysis for the Global Burden of Disease Study 2017. Lancet, 392(10159), 1789-1858. doi: 10.1016/s0140-6736(18)32279-7

Journal - Research Article

Jones, K. M., Bhattacharjee, R., Krishnamurthi, R., Blanton, S., Barker-Collo, S., Theadom, A., … Ranta, A., … Feigin, V. L. (2018). Determining the feasibility and preliminary efficacy of a stroke instructional and educational DVD in a multinational context: A randomized controlled pilot study. Clinical Rehabilitation, 32(8), 1086-1097. doi: 10.1177/0269215518777565

Journal - Research Article

Jones, K. M., O'Grady, G., Rodrigues, M. J., Ranta, A., Roxburgh, R. H., Love, D. R., … on behalf of the MD-PREV study group. (2018). Impacts for children living with genetic muscle disorders and their parents: Findings from a population-based study. Journal of Neuromuscular Diseases, 5(3), 341-352. doi: 10.3233/jnd-170287

Journal - Research Article

Langton Burnell, A., Ranta, A., Wu, T., Fink, J., McGuinness, B., Caldwell, J., Collecutt, W., … Barber, P. A. (2018). Endovascular clot retrieval for acute ischaemic stroke in New Zealand. New Zealand Medical Journal, 131(1484), 13-18. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Ranta, A. (2018). Projected stroke volumes to provide a 10-year direction for New Zealand stroke services. New Zealand Medical Journal, 131(1477), 15-28. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Ranta, A., & Busch, S. (2018). Impact of discontinuation of telestroke: The Nelson experience. New Zealand Medical Journal, 131(1477), 29-34. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Ranta, A., Dovey, S., Gommans, J., Tilyard, M., & Weatherall, M. (2018). Impact of general practitioner transient ischemic attack training on 90-day stroke outcomes: Secondary analysis of a cluster randomized controlled trial. Journal of Stroke & Cerebrovascular Diseases, 27(7), 2014-2018. doi: 10.1016/j.jstrokecerebrovasdis.2018.02.064

Journal - Research Article

Bath, P. M. W., Appleton, J. P., Beridze, M., Christensen, H., Dineen, R. A., Duley, L., … Ranta, A., … Sprigg, N. (2017). Baseline characteristics of the 3096 patients recruited into the ‘Triple Antiplatelets for Reducing Dependency after Ischemic Stroke’ trial. International Journal of Stroke, 12(5), 524-538. doi: 10.1177/1747493016677988

Journal - Research Article

Bergin, P. S., Beghi, E., Sadleir, L. G., Brockington, A., Tripathi, M., Richardson, M. P., … Rosemergy, I., … on behalf of the EpiNet Study Group, including Ranta, A. (2017). EpiNet as a way of involving more physicians and patients in epilepsy research: Validation study and accreditation process. Epilepsia Open, 2(1), 20-31. doi: 10.1002/epi4.12033

Journal - Research Article

Bergin, P. S., Beghi, E., Sadleir, L. G., Tripathi, M., Richardson, M. P., Bianchi, E., … EpiNet Study Group, including Ranta, A. (2017). Do neurologists around the world agree when diagnosing epilepsy?: Results of an international EpiNet study. Epilepsy Research, 139, 43-50. doi: 10.1016/j.eplepsyres.2017.10.014

Journal - Research Article

GBD 2015 Neurological Disorders Collaborator Group, including Poulton, R. G., & Ranta, A. (2017). Global, regional, and national burden of neurological disorders during 1990-2015: A systematic analysis for the Global Burden of Disease Study 2015. Lancet Neurology, 16(11), 877-897. doi: 10.1016/s1474-4422(17)30299-5

Journal - Research Article

Hammond, N., & Ranta, A. (2017). The yield of head computed tomography in patients with new onset of transient headaches. Internal Medicine Journal, 47(10), 1141-1146. doi: 10.1111/imj.13517

Journal - Research Article

Liu, Q., Barber, P. A., Abernethy, G., & Ranta, A. (2017). Provision of stroke thrombolysis services in New Zealand: Changes between 2011 and 2016. New Zealand Medical Journal, 130(1453), 57-62. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Liu, Q., Ranta, A., Abernethy, G., & Barber, P. A. (2017). Trends in New Zealand stroke thrombolysis treatment rates. New Zealand Medical Journal, 130(1453), 50-56. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Ranta, A., Lanford, J., Busch, S., Providence, C., Iniesta, I., Rosemergy, I., … Gommans, J. (2017). Impact and implementation of a sustainable regional telestroke network. Internal Medicine Journal, 47(11), 1270-1275. doi: 10.1111/imj.13557

Journal - Research Article

Ranta, A., Weatherall, M., Gommans, J., Tilyard, M., Odea, D., & Dovey, S. (2017). Appropriateness of general practitioner imaging requests for transient ischaemic attack patients: Secondary analysis of a cluster randomised controlled trial. Journal of Primary Health Care, 9(2), 131-135. doi: 10.1071/HC17005

Journal - Research Article

Barber, P. A., Krishnamurthi, R., Parag, V., Anderson, N. E., Ranta, A., Kilfoyle, D., … for the ARCOS IV Study Group. (2016). Incidence of transient ischemic attack in Auckland, New Zealand, in 2011 to 2012. Stroke, 47(9), 2183-2188. doi: 10.1161/strokeaha.116.014010

Journal - Research Article

Joshi, P., Fink, J., Barber, P. A., Davis, A., Lanford, J., Seymour, A., … Busby, W., … Ranta, A. (2016). Stroke thrombolysis in New Zealand: Data from the first 6 months of the New Zealand Thrombolysis Register. New Zealand Medical Journal, 129(1438), 42-47. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

McAulay-Powell, C., & Ranta, A. (2016). The Australian and New Zealand regional neurology training survey. Internal Medicine Journal, 46(6), 742-744. doi: 10.1111/imj.13103

Journal - Research Article

Ranta, A., & Barber, P. A. (2016). Transient ischemic attack service provision: A review of available service models. Neurology, 86(10), 947-953. doi: 10.1212/WNL.0000000000002339

Journal - Research Article

Ranta, A., Dovey, S., Weatherall, M., O'Dea, D., Gommans, J., & Tilyard, M. (2015). Cluster randomised controlled trial of TIA electronic decision support in primary care. Neurology, 84(15), 1545-1551. doi: 10.1212/WNL.0000000000001472

Journal - Research Article

Ranta, A., Tiwari, P., Mottershead, J., Abernethy, D., Simpson, M., Brickell, K., … Frith, R. (2015). New Zealand's neurologist workforce: A pragmatic analysis of demand, supply and future projections. New Zealand Medical Journal, 128(1419). Retrieved from http://www.nzma.org.nz/journal

Journal - Research Article

Sadleir, L. G., Paterson, S., Smith, K. R., Redshaw, N., Ranta, A., Kalnins, R., … Scheffer, I. E. (2015). Myoclonic Occipital Photosensitive Epilepsy with Dystonia (MOPED): A familial epilepsy syndrome. Epilepsy Research, 114, 98-105. doi: 10.1016/j.eplepsyres.2015.04.014

Journal - Research Article

The TARDIS Trial Investigators, including Ranta, A. (2015). Safety and effficacy of intensive vs. guideline antiplatelet therapy in high-risk patients with recent ischemic stroke or transient ischemic attack: Rationale and design of the Triple Antiplatelets for Reducing Dependency after Ischaemic Stroke (TARDIS) trial (ISRCTN47823388). International Journal of Stroke, 10(7), 1159-1165. doi: 10.1111/ijs.12538

Journal - Research Article

Brownlee, W., Ranta, A., Dale-Gandar, J., Bennett, P., Gommans, J., Fink, J., & Barber, P. A. (2014). Changes in the provision of transient ischaemic attack services in New Zealand 2008 to 2013. New Zealand Medical Journal, 127(1390). Retrieved from http://www.nzma.org.nz/journal

Journal - Research Article

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