Photo of Dr Gabriela Czanner

Dr Gabriela Czanner PhD CStat FHEA

Lecturer in Ophthalmic Statistics Eye & Vision Sciences

Publications

2018

Improving precision for detecting change in the shape of the cornea in patients with keratoconus (Journal article)

Brunner, M., Czanner, G., Vinciguerra, R., Romano, V., Ahmad, S., Batterbury, M., . . . Kaye, S. B. (2018). Improving precision for detecting change in the shape of the cornea in patients with keratoconus. SCIENTIFIC REPORTS, 8. doi:10.1038/s41598-018-30173-7

DOI: 10.1038/s41598-018-30173-7

Dynamic longitudinal discriminant analysis using multiple longitudinal markers of different types (Journal article)

Hughes, D. M., Komarek, A., Czanner, G., & Garcia-Finana, M. (2018). Dynamic longitudinal discriminant analysis using multiple longitudinal markers of different types. Statistical Methods in Medical Research, 27(7), 2060-2080. doi:10.1177/0962280216674496

DOI: 10.1177/0962280216674496

Prospective, single UK centre, comparative study of the predictive values of contrast-enhanced ultrasound compared to time-resolved CT angiography in the detection and characterisation of endoleaks in high risk patients undergoing endovascular aneurysm repair surveillance: a protocol (Journal article)

Roy, I. N., Chan, T. Y., Czanner, G., Wallace, S., & Vallabhaneni, S. R. (2018). Prospective, single UK centre, comparative study of the predictive values of contrast-enhanced ultrasound compared to time-resolved CT angiography in the detection and characterisation of endoleaks in high risk patients undergoing endovascular aneurysm repair surveillance: a protocol. BMJ OPEN, 8(4). doi:10.1136/bmjopen-2017-020835

DOI: 10.1136/bmjopen-2017-020835

2017

Spatial statistical modelling of capillary non-perfusion in the retina (Journal article)

MacCormick, I., Zheng, Y., Czanner, S., Zhao, Y., Diggle, P., Harding, S., & Czanner, G. (2017). Spatial statistical modelling of capillary non-perfusion in the retina. Scientific Reports, 7. doi:10.1038/s41598-017-16620-x

DOI: 10.1038/s41598-017-16620-x

Dynamic classification using credible intervals in longitudinal discriminant analysis (Journal article)

Hughes, D. M., Komarek, A., Bonnett, L. J., Czanner, G., & Garcia-Finana, M. (2017). Dynamic classification using credible intervals in longitudinal discriminant analysis. STATISTICS IN MEDICINE, 36(24), 3858-3874. doi:10.1002/sim.7397

DOI: 10.1002/sim.7397

UV imaging reveals facial areas that are prone to skin cancer are disproportionately missed during sunscreen application (Journal article)

Pratt, H., Hassanin, K., Troughton, L. D., Czanner, G., Zheng, Y., McCormick, A. G., & Hamill, K. J. (2017). UV imaging reveals facial areas that are prone to skin cancer are disproportionately missed during sunscreen application. PLOS ONE, 12(10). doi:10.1371/journal.pone.0185297

DOI: 10.1371/journal.pone.0185297

Ophthalmic statistics note 12: multivariable or multivariate: what's in a name? (Journal article)

Bunce, C., Czanner, G., Grzeda, M. T., Dore, C. J., & Freemantle, N. (2017). Ophthalmic statistics note 12: multivariable or multivariate: what's in a name?. BRITISH JOURNAL OF OPHTHALMOLOGY, 101(10), 1303-1305. doi:10.1136/bjophthalmol-2017-310846

DOI: 10.1136/bjophthalmol-2017-310846

EARLY IDENTIFICATION OF PATIENTS WITH DRUG-RESISTANT EPILEPSY (Poster)

Hughes, D. M., Bonnett, L. J., Czanner, G., Komarek, A., Marson, A., & Garcia-Finana, M. (2017). EARLY IDENTIFICATION OF PATIENTS WITH DRUG-RESISTANT EPILEPSY. Poster session presented at the meeting of Unknown Conference. Retrieved from http://gateway.webofknowledge.com/

Towards better characterization and quantification of emulsification of silicone oil in vitro (Journal article)

Chan, Y. K., Czanner, G., Shum, H. C., Williams, R. L., Cheung, N., & Wong, D. (2017). Towards better characterization and quantification of emulsification of silicone oil in vitro. Acta Ophthalmologica, 95(5), e385-e392. doi:10.1111/aos.13258

DOI: 10.1111/aos.13258

Dynamic Longitudinal Discriminant Analysis: Statistical and clinical findings from The DiALog project (Presentation material)

Hughes., Komarek, A., Bonnett, L. J., Czanner, G., Marson, A., & Garcia-Finana, M. (2017). Dynamic Longitudinal Discriminant Analysis: Statistical and clinical findings from The DiALog project. Statistical Analysis of Multi-Outcome Data (SAM) 2017.

Novel Retinal Lesion in Ebola Survivors, Sierra Leone, 2016 (Journal article)

Steptoe, P. J., Scott, J. T., Baxter, J. M., Parkes, C. K., Dwivedi, R., Czanner, G., . . . Semple, M. G. (2017). Novel Retinal Lesion in Ebola Survivors, Sierra Leone, 2016. EMERGING INFECTIOUS DISEASES, 23(7), 1102-1109. doi:10.3201/eid2307.161608

DOI: 10.3201/eid2307.161608

Ultraviolet imaging reveals that areas on the face that are prone to skin cancer are disproportionately missed during sunscreen application (Conference Paper)

Hassanin, K., Pratt, H., Zheng, Y., Czanner, G., Hamill, K., & McCormick, A. (2017). Ultraviolet imaging reveals that areas on the face that are prone to skin cancer are disproportionately missed during sunscreen application. In BRITISH JOURNAL OF DERMATOLOGY Vol. 177 (pp. 13-14). Retrieved from http://gateway.webofknowledge.com/

Diagnostic performance of the handheld Radial Shape Discrimination test for detecting recent onset neovascular age-related macular degeneration (Conference Paper)

Knox, P. C., Vazquez, N. P., Harding, S. P., Heimann, H., & Czanner, G. (2017). Diagnostic performance of the handheld Radial Shape Discrimination test for detecting recent onset neovascular age-related macular degeneration. In INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE Vol. 58. Retrieved from http://gateway.webofknowledge.com/

In vitro experiment to elucidate the mechanism of the "soft shell technique' for preventing subretinal migration of perfluoro-octane (Journal article)

Chan, Y. K., Lu, Y., Czanner, G., Wu, J., Cheng, H. C., Hussain, R., . . . Wong, D. (2017). In vitro experiment to elucidate the mechanism of the "soft shell technique' for preventing subretinal migration of perfluoro-octane. BRITISH JOURNAL OF OPHTHALMOLOGY, 101(3), 389-394. doi:10.1136/bjophthalmol-2016-309856

DOI: 10.1136/bjophthalmol-2016-309856

Porous Versus Nonporous Orbital Implants After Enucleation for Uveal Melanoma: A Randomized Study (Journal article)

Ho, V. W. M., Hussain, R. N., Czanner, G., Sen, J., Heimann, H., & Damato, B. E. (2017). Porous Versus Nonporous Orbital Implants After Enucleation for Uveal Melanoma: A Randomized Study. OPHTHALMIC PLASTIC AND RECONSTRUCTIVE SURGERY, 33(6), 452-458. doi:10.1097/IOP.0000000000000824

DOI: 10.1097/IOP.0000000000000824

Safety and acceptability of an organic light-emitting diode sleep mask as a potential therapy for retinal disease (Journal article)

Sahni, J. N., Czanner, G., Gutu, T., Taylor, S. A., Bennett, K. M., Wuerger, S. M., . . . Harding, S. P. (2017). Safety and acceptability of an organic light-emitting diode sleep mask as a potential therapy for retinal disease. Eye, 31(1), 97-106. doi:10.1038/eye.2016.259

DOI: 10.1038/eye.2016.259

Safety and acceptability of an organic light-emitting diode sleep mask as a potential therapy for retinal disease (Journal article)

Sahni, J. N., Czanner, G., Gutu, T., Taylor, S. A., Bennett, K. M., Wuerger, S. M., . . . Harding, S. P. (2017). Safety and acceptability of an organic light-emitting diode sleep mask as a potential therapy for retinal disease. EYE, 31(1), 106. Retrieved from http://gateway.webofknowledge.com/

2016

Near-infrared reflectance and autofluorescence imaging characteristics of choroidal nevi (Journal article)

Vallabh, N. A., Sahni, J. N., Parkes, C. K., Czanner, G., Heimann, H., & Damato, B. (2016). Near-infrared reflectance and autofluorescence imaging characteristics of choroidal nevi. EYE, 30(12), 1593-1597. doi:10.1038/eye.2016.183

DOI: 10.1038/eye.2016.183

Longitudinal Visuomotor Development in a Malaria Endemic Area: Cerebral Malaria and Beyond (Journal article)

Knox, P. C., MacCormick, I. J. C., Mbale, E., Malewa, M., Czanner, G., & Harding, S. P. (2016). Longitudinal Visuomotor Development in a Malaria Endemic Area: Cerebral Malaria and Beyond. PLoS ONE, 11(10). doi:10.1371/journal.pone.0164885

DOI: 10.1371/journal.pone.0164885

Automated Measurement of Visual Acuity in Pediatric Ophthalmic Patients Using Principles of Game Design and Tablet Computers (Journal article)

Aslam, T. M., Tahir, H. J., Parry, N. R. A., Murray, I. J., Kwak, K., Heyes, R., . . . Ashworth, J. (2016). Automated Measurement of Visual Acuity in Pediatric Ophthalmic Patients Using Principles of Game Design and Tablet Computers. AMERICAN JOURNAL OF OPHTHALMOLOGY, 170, 223-227. doi:10.1016/j.ajo.2016.08.013

DOI: 10.1016/j.ajo.2016.08.013

Identifying disease progression using longitudinal discriminant analysis (Poster)

Hughes., Komarek, A., Czanner, G., & Van der Hoek, M. (2016). Identifying disease progression using longitudinal discriminant analysis. Poster session presented at the meeting of 2016 Conference of the Royal Statistical Society. Manchester.

The Novel Evidenced Assessment of Tortuosity system: interobserver reliability and agreement with clinical assessment (Journal article)

Balaskas, K., Tiew, S., Czanner, G., Tan, A. L., Ashworth, J., Biswas, S., & Aslam, T. (2016). The Novel Evidenced Assessment of Tortuosity system: interobserver reliability and agreement with clinical assessment. ACTA OPHTHALMOLOGICA, 94(6), E421-E426. doi:10.1111/aos.12907

DOI: 10.1111/aos.12907

Perforin expression in eyelid sebaceous carcinomas: a useful and specific immunomarker for the differential diagnosis of eyelid carcinomas (Journal article)

Mittal, R., Araujo, I., Czanner, G., & Coupland, S. E. (2016). Perforin expression in eyelid sebaceous carcinomas: a useful and specific immunomarker for the differential diagnosis of eyelid carcinomas. ACTA OPHTHALMOLOGICA, 94(5), e325-e330. doi:10.1111/aos.12972

DOI: 10.1111/aos.12972

Discriminant Function Analysis for Longitudinal Data (DiALog): Applications in Medical Research (Poster)

Hughes., Czanner, G., Cox, T., Bonnett, L., Harding, S., Marson, A., . . . Van der Hoek, M. (2016). Discriminant Function Analysis for Longitudinal Data (DiALog): Applications in Medical Research. Poster session presented at the meeting of 2016 MRC Festival of Medical Science. Liverpool.

A practical divergence measure for survival distributions that can be estimated from Kaplan-Meier curves (Journal article)

Cox, T. F., & Czanner, G. (2016). A practical divergence measure for survival distributions that can be estimated from Kaplan-Meier curves. STATISTICS IN MEDICINE, 35(14), 2406-2421. doi:10.1002/sim.6868

DOI: 10.1002/sim.6868

Fiat Lux: the effect of illuminance on acuity testing (Journal article)

Tidbury, L. P., Czanner, G., & Newsham, D. (2016). Fiat Lux: the effect of illuminance on acuity testing. GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 254(6), 1091-1097. doi:10.1007/s00417-016-3329-7

DOI: 10.1007/s00417-016-3329-7

Development and testing of an automated computer tablet-based method for self-testing of high and low contrast near visual acuity in ophthalmic patients (Journal article)

Aslam, T. M., Parry, N. R. A., Murray, I. J., Salleh, M., Dal Col, C., Mirza, N., . . . Tahir, H. J. (2016). Development and testing of an automated computer tablet-based method for self-testing of high and low contrast near visual acuity in ophthalmic patients. GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 254(5), 891-899. doi:10.1007/s00417-016-3293-2

DOI: 10.1007/s00417-016-3293-2

OSCILLATORY POTENTIAL: A MORE SENSITIVE MARKER FOR DIABETIC MACULOPATHY PROGRESSION? (Conference Paper)

Raj, A., Czanner, G., Sahni, J., Campa, C., Hagan, R., & Harding, S. P. (2016). OSCILLATORY POTENTIAL: A MORE SENSITIVE MARKER FOR DIABETIC MACULOPATHY PROGRESSION?. In EUROPEAN JOURNAL OF OPHTHALMOLOGY Vol. 26 (pp. E91). Retrieved from http://gateway.webofknowledge.com/

2015

Developing retinal biomarkers of neurological disease: an analytical perspective (vol 9, pg 691, 2015) (Journal article)

MacCormick, I. J. C., Czanner, G., & Faragher, B. (2015). Developing retinal biomarkers of neurological disease: an analytical perspective (vol 9, pg 691, 2015). BIOMARKERS IN MEDICINE, 9(9), 937. doi:10.2217/bmm.15.76

DOI: 10.2217/bmm.15.76

Early Detection of Diabetic Retinopathy using Personalised Longitudinal Discriminant Analysis (Presentation material)

Hughes, D., Czanner, G., Komarek, A., Harding, S., & Garcia Finana, M. (2015). Early Detection of Diabetic Retinopathy using Personalised Longitudinal Discriminant Analysis. Utrecht, Holland.

A Mixed-Method Analysis Assessing the Effects of Wearing organic light emitting diode (OLED) sleep mask on Sleep and Psychological Wellbeing (Journal article)

Bennett, K., Wuerger, S., Lowers, V., Sahni, J., Czanner, G., Gutu, T., . . . Harding, S. (2015). A Mixed-Method Analysis Assessing the Effects of Wearing organic light emitting diode (OLED) sleep mask on Sleep and Psychological Wellbeing. PERCEPTION, 44, 335-336. Retrieved from http://gateway.webofknowledge.com/

Flexible Discriminant Analysis Using Multivariate Mixed Models (Presentation material)

Hughes, D., Czanner, G., Komarek, A., & Garcia Finana, M. (2015). Flexible Discriminant Analysis Using Multivariate Mixed Models. University of Warwick.

Personalised Longitudinal Discriminant Analysis for Early Detection of Diabetic Retinopathy (Poster)

Hughes, D., Czanner, G., Cheyne, C., Komarek, A., Harding, S., & Garcia Finana, M. (2015). Personalised Longitudinal Discriminant Analysis for Early Detection of Diabetic Retinopathy. Poster session presented at the meeting of ITM Research Day. University of Liverpool.

Developing retinal biomarkers of neurological disease: an analytical perspective (Journal article)

MacCormick, I. J. C., Czanner, G., & Faragher, B. (2015). Developing retinal biomarkers of neurological disease: an analytical perspective. BIOMARKERS IN MEDICINE, 9(7), 691-701. doi:10.2217/BMM.15.17

DOI: 10.2217/BMM.15.17

Standardization of choroidal thickness measurements using enhanced depth imaging optical coherence tomography (Journal article)

Boonarpha, N., Zheng, Y., Stangos, A. N., Lu, H., Raj, A., Czanner, G., . . . Nair-Sahni, J. (2015). Standardization of choroidal thickness measurements using enhanced depth imaging optical coherence tomography. INTERNATIONAL JOURNAL OF OPHTHALMOLOGY, 8(3), 484-491. doi:10.3980/j.issn.2222-3959.2015.03.09

DOI: 10.3980/j.issn.2222-3959.2015.03.09

Measuring the signal-to-noise ratio of a neuron (Journal article)

Czanner, G., Sarma, S., Ba, D., Eden, U. T., Wu, W., Eskandar, E., . . . Brown, E. N. (2015). Measuring the signal-to-noise ratio of a neuron. Proceedings of the National Academy of Sciences of the United States of America (PNAS) ISSN 1091-6490, 112(23), 7141-7146. doi:10.1073/pnas.1505545112

DOI: 10.1073/pnas.1505545112

Assessing the quality of ophthalmic anesthesia (Journal article)

Spiteri, N., Sidaras, G., Czanner, G., Batterbury, M., & Kaye, S. B. (2015). Assessing the quality of ophthalmic anesthesia. JOURNAL OF CLINICAL ANESTHESIA, 27(4), 285-289. doi:10.1016/j.jclinane.2015.01.008

DOI: 10.1016/j.jclinane.2015.01.008

Impact of hypertension on choroidal thickness in central serous chorioretinopathy (Conference Paper)

Boonarpha, N., Zheng, Y., Czanner, G., Harding, S. P., & Sahni, J. (2015). Impact of hypertension on choroidal thickness in central serous chorioretinopathy. In INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE Vol. 56. Retrieved from http://gateway.webofknowledge.com/

Safety and acceptability of an organic light emitting diode (OLED) sleep mask for the treatment of retinal diseases: INSIGHT Study (Conference Paper)

Czanner, G., Gutu, T., Harding, S. P., Holland, M., Grierson, I., Bennett, K., . . . Sahni, J. (2015). Safety and acceptability of an organic light emitting diode (OLED) sleep mask for the treatment of retinal diseases: INSIGHT Study. In INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE Vol. 56. Retrieved from http://gateway.webofknowledge.com/

Human Conjunctival Stem Cells are Predominantly Located in the Medial Canthal and Inferior Forniceal Areas. (Journal article)

Stewart, R. M. K., Sheridan, C. M., Hiscott, P. S., Czanner, G., & Kaye, S. B. (2015). Human Conjunctival Stem Cells are Predominantly Located in the Medial Canthal and Inferior Forniceal Areas.. Investigative Ophthalmology and Visual Science, 56(3), 2021-2030. doi:10.1167/iovs.14-16266

DOI: 10.1167/iovs.14-16266

Developing retinal biomarkers of neurological disease: an analytical perspective (Journal article)

MacCormick, I., Czanner, G., & Faragher, B. (2015). Developing retinal biomarkers of neurological disease: an analytical perspective. Biomarkers in Medicine, 9(7), 691-701. doi:10.2217/bmm.15.17

DOI: 10.2217/bmm.15.17

tSNR as Feature Selection Technique in SNP Data Analysis (Conference Paper)

Hassan, N., Garcia-Finana, M., Czanner, G., & Jorgensen, A. (2015). tSNR as Feature Selection Technique in SNP Data Analysis. In HUMAN HEREDITY Vol. 80 (pp. 112). Retrieved from http://gateway.webofknowledge.com/

2014

A divergence measure for survival distributions (Journal article)

Cox, T., & Czanner, G. (2014). A divergence measure for survival distributions. Statistics in Medicine.

Ophthalmic statistics note: the perils of dichotomising continuous variables (Journal article)

Cumberland, P. M., Czanner, G., Bunce, C., Dore, C. J., Freemantle, N., Garcia-Finana, M., & Grp, O. S. (2014). Ophthalmic statistics note: the perils of dichotomising continuous variables. BRITISH JOURNAL OF OPHTHALMOLOGY, 98(6), 841-843. doi:10.1136/bjophthalmol-2014-304930

DOI: 10.1136/bjophthalmol-2014-304930

The perils of dichotomising continuous variables (Journal article)

Cumberland, P., Czanner, G., Bunce, C., Dore, C. J., Freemantle, N., & Garcia-Finana, M. (2014). The perils of dichotomising continuous variables. British Journal of Ophthalmology, 98(98), 841-843. Retrieved from http://bjo.bmj.com/content/98/6/841.full?keytype=ref&ijkey=6tKmrVCME04bLzg

2013

Improving the analysis of choroidal laser doppler flowmetry measurements; application in patients with retinal diseases. (Journal article)

Boonarpha, N., Czanner, G., Raj, A., Zheng, Y., Geiser, M., Riva, C., . . . Harding, S. (2013). Improving the analysis of choroidal laser doppler flowmetry measurements; application in patients with retinal diseases.. Invest Ophthalmol Vis Sci, 54, 5871.

Retinal microvascular dysfunction in paediatric cerebral malaria is associated with death and neurological sequelae. (Presentation material)

MacCormick, I., Glover, S. J., Beare, N., Czanner, G., Mallewa, M., Taylor, T. E., . . . Harding, S. (2013). Retinal microvascular dysfunction in paediatric cerebral malaria is associated with death and neurological sequelae..

2012

'Menopausal hormone therapy and risk of gastrointestinal cancer: Nested case-control study within a prospective cohort, and meta-analysis' (Journal article)

Green, J., Czanner, G., Reeves, G., Watson, J., Wise, L., Roddam, A., & Beral, V. (2012). 'Menopausal hormone therapy and risk of gastrointestinal cancer: Nested case-control study within a prospective cohort, and meta-analysis'. International Journal of Cancer, 130(10), 2387-2396.

2011

'Computing Confidence Intervals for Point Process Models' (Journal article)

Sarma, S. V., Nguyen, D. P., Czanner, G., Wirth, S., Wilson, M. A., Suzuki, W., & Brown, E. N. (2011). 'Computing Confidence Intervals for Point Process Models'. Neural Computation, 23(11), 2731-2745.

2010

Oral bisphosphonates and risk of cancer of oesophagus, stomach, and colorectum: case-control analysis within a UK primary care cohort (Journal article)

Green, J., Czanner, G., Reeves, G., Watson, J., Wise, L., & Beral, V. (2010). Oral bisphosphonates and risk of cancer of oesophagus, stomach, and colorectum: case-control analysis within a UK primary care cohort. BMJ, 341(sep01 3), c4444. doi:10.1136/bmj.c4444

DOI: 10.1136/bmj.c4444

2008

'Analysis of between-trial and within-trial neural spiking dynamics' (Journal article)

Czanner, G., Eden, U. T., Wirth, S., Yanike, M., Suzuki, W. A., & Brown, E. N. (2008). 'Analysis of between-trial and within-trial neural spiking dynamics'. Journal of Neurophysiology, 99(5), 2672-2693.

2005

Cluster analysis-based physiological classification and morphological properties of inhibitory neurons in layers 2-3 of monkey dorsolateral prefrontal cortex. (Journal article)

Krimer, L., Zaitsev, A., Czanner, G., Kröner, S., González-Burgos, G., Povysheva, N. V., & Iyengar, S. (2005). Cluster analysis-based physiological classification and morphological properties of inhibitory neurons in layers 2-3 of monkey dorsolateral prefrontal cortex.. J Neurophysiol, 94(5), 3009-3022.

Theory of the snowflake plot and its relations to higher-order analysis methods (Journal article)

Czanner, G., Gruen, S., & Iyengar, S. (2005). Theory of the snowflake plot and its relations to higher-order analysis methods. Neural Computation, 17(7), 1456-1479.