Professor Amanda Chetwynd

Provost

Research Interests

  • combinatorics
  • spatial statistics
  • latin squares

Breast-Feeding and Childhood-Onset Type 1 Diabetes: A pooled analysis of individual participant data from 43 observational studies
Cardwell, C.R., Stene, L.C., Ludvigsson, J., Rosenbauer, J., Cinek, O., Svensson, J., Perez-Bravo, F., Memon, A., Gimeno, S.G., Wadsworth, E.J.K., Strotmeyer, E.S., Goldacre, M.J., Radon, K., Chuang, L., Parslow, R.C., Chetwynd, A., Karavanaki, K., Brigis, G., Pozzilli, P., Urbonaite, B., Schober, E., Devoti, G., Sipetic, S., Joner, G., Ionescu-Tirgoviste, C., de Beaufort, C.E., Harrild, K., Benson, V., Savilahti, E., Ponsonby, A., Salem, M., Rabiei, S., Patterson, C.C. 11/2012 In: Diabetes Care. 35, 11, p. 2215-2225. 11 p.
Journal article

Birth order and childhood type 1 diabetes risk: a pooled analysis of 31 observational studies
Cardwell, C.R., Stene, L.C., Joner, G., Bulsara, M.K., Cinek, O., Rosenbauer, J., Ludvigsson, J., Svensson, J., Goldacre, M.J., Waldhoer, T., Jarosz-Chobot, P., Gimeno, S.G.A., Chuang, L., Roberts, C.L., Parslow, R.C., Wadsworth, E.J.K., Chetwynd, A., Brigis, G., Urbonaite, B., Sipetic, S., Schober, E., Devoti, G., Ionescu-Tirgoviste, C., de Beaufort, C.E., Stoyanov, D., Buschard, K., Radon, K., Glatthaar, C., Patterson, C.C. 04/2011 In: International Journal of Epidemiology. 40, 2, p. 363-374. 12 p.
Journal article

Statistics and scientific method: an introduction for students and researchers
Diggle, P., Chetwynd, A. 2011 New York : Oxford University Press. 172 p. ISBN: 9780199543199.
Book

Birthweight and the risk of childhood-onset type 1 diabetes: a meta-analysis of observational studies using individual patient data
Cardwell, C.R., Stene, L.C., Joner, G., Davis, E.A., Cinek, O., Rosenbauer, J., Ludvigsson, J., Castell, C., Svensson, J., Goldacre, M.J., Waldhoer, T., Polanska, J., Gimeno, S.G.A., Chuang, L.-., Parslow, R.C., Wadsworth, E.J.K., Chetwynd, A., Pozzilli, P., Brigis, G., Urbonaite, B., Sipetic, S., Schober, E., Ionescu-Tirgoviste, C., de Beaufort, C.E., Stoyanov, D., Buschard, K., Patterson, C.C. 04/2010 In: Diabetologia. 53, 4, p. 641-651. 11 p.
Journal article

Maternal age at birth and childhood type 1 diabetes: a pooled analysis of 30 observational studies
Cardwell, C.R., Stene, L.C., Joner, G., Bulsara, M.K., Cinek, O., Rosenbauer, J., Ludvigsson, J., Jane, M., Svensson, J., Goldacre, M.J., Waldhoer, T., Jarosz-Chobot, P., Gimeno, S.G.A., Chuang, L., Parslow, R.C., Wadsworth, E.J.K., Chetwynd, A., Pozzilli, P., Brigis, G., Urbonaite, B., Sipetic, S., Schober, E., Devoti, G., Ionescu-Tirgoviste, C., de Beaufort, C.E., Stoyanov, D., Buschard, K., Patterson, C.C. 02/2010 In: Diabetes Care. 59, 2, p. 486-494. 9 p.
Journal article

Joint modelling of repeated measurements and time-to-event outcomes: the fourth Armitage lecture.
Diggle, P.J., Sousa, I., Chetwynd, A.G. 20/07/2008 In: Statistics in Medicine. 27, 16, p. 2981-2998. 18 p.
Journal article

A higher degree of concern: Postgraduate degrees in Science, Technology and Mathematics
Royal Society 2008 In: Royal Society Report. London : Royal Society ISBN: 9780854036738.
Chapter

Second-order analysis of inhomogeneous spatial point process data.
Diggle, P.J., Gomez-Rubio, V., Brown, P.E., Chetwynd, A.G., Gooding, S. 06/2007 In: Biometrics. 63, 2, p. 550-557. 8 p.
Journal article

A degree of concern? UK first degrees in science, technology and mathematics.
Chetwynd, A.G. 10/2006 London : Royal Society, 4 p.
Working paper

Cholera - a step too Farr.
Chetwynd, A., Short, H. 06/2006 In: Significance. 3, 2, p. 88-90. 3 p.
Journal article

Effect and Duration of Lung Volume Reduction Surgery: Mid-Term Results of the Brompton Trial.
Lim, E., Ali, A., Cartwright, N., Sousa, I., Chetwynd, A.G., Polkey, M., Geddes, D., Pepper, J., Diggle, P., Goldstraw, P. 2/04/2006 In: The Thoracic and Cardiovascular Surgeon Reports. 54, 3, p. 188-192. 5 p.
Journal article

High Correlation is not the whole Story: A cautionary note on the use of simple metrics to determine QR allocations
Chetwynd, A., Diggle, P. 2006 London : HM Treasury. 11 p.
Other report

Exploratory analysis of longitudinal trials with staggered intervention times.
Chetwynd, A.G., Diggle, P.J., Sousa, I. 07/2005 In: Biostatistics. 6, 3, p. 479-485. 7 p.
Journal article

Type 1 diabetes mellitus in childhood : a matched case control study in Lancashire and Cumbria, UK.
Marshall, A.L., Chetwynd, A., Morris, J.A., Placzek, M., Smith, C., Olabi, A., Thistlethwaite, D. 09/2004 In: Diabetic Medicine. 21, 9, p. 1035-1040. 6 p.
Journal article

Asymptomatic primary biliary cirrhosis : clinical features, prognosis and symptom progression in a large population based cohort.
Prince, M.I., Chetwynd, A., Craig, W.L., Metcalf, J.V., James, O.F.W. 3/06/2004 In: Gut. 53, 6, p. 865-870. 6 p.
Journal article

Do clever brains age more slowly? Further exploration of a nun result.
Rabbitt, P., Chetwynd, A., McInnes, L. 02/2003 In: British Journal of Psychology. 94, 1, p. 63-71. 9 p.
Journal article

QCA Geometry Report.
Faux, G., Chetwynd, A.G. 2003
Other

Estimation of Spatial Variation in Risk Using Matched Case-control Data.
Jarner, M.F., Diggle, P.J., Chetwynd, A.G. 12/2002 In: Biometrical Journal. 44, 8, p. 936-945. 10 p.
Journal article

Survival and symptom progression in a geographically based cohort of patients with primary biliary cirrhosis: Follow-up for up to 28 years.
Prince, M.I., Chetwynd, A.G., Craig, W., Metcalf, J., James, O.F.W. 10/2002 In: Gastroenterology. 123, 4, p. 1044-1051. 8 p.
Journal article

Individual inconsistency across measures of inhibition: an investigation of the construct validity of inhibition in older adults.
Shilling, V., Chetwynd, A.G., Rabbitt, P.M.A. 2002 In: Neuropsychologia. 40, 6, p. 605-620. 16 p.
Journal article

Multivariate analysis of survival in a large population based cohort of patients with primary biliary cirrhosis (PBC)
James, O., Prince, M., Craig, W., Metcalf, J., Chetwynd, A. 2002
Meeting abstract

The geographical distribution of primary biliary cirrhosis in a well-defined cohort.
Prince, M.I., Chetwynd, A.G., Diggle, P.J., Jarner, M., Metcalf, J.V., James, O.F.W. 12/2001 In: Hepatology. 34, 6, p. 1083-1088. 6 p.
Journal article

Investigation of spatial clustering from matched and stratified case-control studies.
Chetwynd, A.G., Diggle, P.J., Marshall, A., Parslow, R. 4/09/2001 In: Biostatistics. 2, 3, p. 277-293. 17 p.
Journal article

Supporting student learning.
Anderson, J., Austin, K., Barnard, A., Chetwynd, A.G., Kahn, P.E. 12/2000 In: Teaching Mathematics and its Applications. 19, 4, p. 166-172. 7 p.
Journal article

Long-term survival in "modern" PBC is significantly better than the Mayo model predicts.
Prince, M.I., Chetwynd, A.G., Diggle, P.J., Metcalf, J.V., James, O.F. 04/2000 In: Journal of Hepatology. 34, Supple, p. 216-216. 1 p.
Journal article

Evidence of Spatial variation in risk and clustering in PBC
James, O.F.W., Bhopal, R.S., Chetwynd, A., Diggle, P., Jarnet, M., Metcalf, J.V. 1999
Meeting abstract

The significance of ideas in undergraduate mathematics.
Kahn, P.E., Anderson, J., Austin, K., Barnard, A., Jagger, J., Chetwynd, A.G. 06/1998 In: Teaching Mathematics and its Applications. 17, 2, p. 78-85. 8 p.
Journal article

A mixture model for sucking patterns of brest-fed infants.
Chetwynd, A.G., Diggle, P., Drewett, R., Young, B. 28/02/1998 In: Statistics in Medicine. 17, 4, p. 395-405. 11 p.
Journal article

Formal specification of distributed multimedia systems.
Blair, G.S., Blair, L., Bowman, H., Chetwynd, A.G. 1998 UCL Press.
Book

On estimating the reduced second moment measure of a stationery spatial point process.
Chetwynd, A.G., Diggle, P. 1998 In: Australian Journal of Statistics. 40, 1, p. 11-15. 5 p.
Journal article

Avoiding partial Latin squares and intricacy.
Chetwynd, A.G., Rhodes, S.J. 1/12/1997 In: Discrete Mathematics. 177, 1-3, p. 17-32. 16 p.
Journal article

Avoiding multiple entry arrays.
Chetwynd, A.G., Rhodes, S.J. 08/1997 In: Journal of Graph Theory. 25, 4, p. 257-266. 10 p.
Journal article

Electron microscopy and digital image analysis.
Henderson, M., Chetwynd, A.G. 1997 In: Today's Life Science. p. 22-29. 8 p.
Journal article

Sucking patterns in breast fed babies.
Young, B., Drewett, R., Chetwynd, A.G., Diggle, P. 11/1996 In: Journal of Reproductive and Infant Psychology. 14, 4, p. 299-324. 26 p.
Journal article

An improvement of Hind's upper bound on the total chromatic number.
Chetwynd, A.G., Haggkvist, R.A. 06/1996 In: Combinatorics, Probability and Computing. 5, 2, p. 99-104. 6 p.
Journal article

Costing-Extending the Locative Logic Model of Networks.
Banres, N., Blair, G.S., Lakas, A., Chetwynd, A.G. 06/1996 In: 8th EuroMricro Workshop on Real-Time Systems.
Chapter

Specification and Verification of Real-Time Safety and Liveness Properties using LOTOS and SQTL.
Lakas, A., Blair, G.S., Chetwynd, A.G. 03/1996 In: Proceedings of the Eighth International Workshop on Software Specification and Design.
Chapter

A formal approach to the design of QoS parameters in multimedia systems.
Lakas, A., Blair, G.S., Chetwynd, A.G. 1996 In: Proceedings of the 4th International Workshop on Quality of Service.
Chapter

Learning to teach.
Chetwynd, A.G. 1996 In: Teaching and Learning Undergraduate Mathematics.
Journal article

Specification of Stochastic Properties in Real-Time Systems.
Lakas, A., Blair, G.S., Chetwynd, A.G. 1996 In: Proceedings of the 11th UK Performance Engineering Workshop for Computer and Telecommunications Systems. Springer p. 202-216. 15 p.
Chapter

Formal description of multimedia systems : an assessment of potential techniques.
Bowman, H., Blair, L., Blair, G.S., Chetwynd, A.G. 12/1995 In: Computer Communications. 18, 12, p. 964-977. 14 p.
Journal article

Formal specification and verification of multimedia systems in open distributed processing.
Blair, L., Blair, G.S., Bowman, H., Chetwynd, A.G. 30/09/1995 In: Computer Standards and Interfaces. 17, 5-6, p. 413-436. 24 p.
Journal article

Chessboard squares.
Chetwynd, A.G., Rhodes, S.J. 28/06/1995 In: Discrete Mathematics. 141, 1-3, p. 47-59. 13 p.
Journal article

Second-order analysis of space-time disease clustering
Diggle, P.J., Chetwynd, A.G., Häggkvist, R., Morris, S.E. 06/1995 In: Statistical Methods in Medical Research. 4, 2, p. 124-136. 13 p.
Journal article

A cascade of numbers.
Chetwynd, A.G., Burn, B. 1995 London : Edward Arnold.
Book

Discrete mathematics.
Chetwynd, A.G., Diggle, P.J. 1995 London : Arnold. 209 p. ISBN: 0340610476.
Book

A formal description technique supporting quality of service and media synchronisation.
Bowman, H., Blair, L., Blair, G.S., Chetwynd, A.G. 1994 In: Proceedings of Cost 237 : multimedia transport and teleservices. Springer
Chapter

A framework for the formal specification and verification of distributed multimedia systems.
Blair, L., Blair, G.S., Bowman, H., Chetwynd, A.G. 1994 In: Proceedings of the Workshop on Quality of Service and Network Performance, 2nd International Conference on Intelligence in Broadband Services and Networks.
Chapter

A framework for the formal specification of multimedia systems in open distributed processing MPG-93-12 J.
Blair, L., Blair, G.S., Bowman, H., Chetwynd, A.G., Papathomas, M. 1994 In: Proceedings of the Workshop on Distributed Multimedia Applications and Quality of Service Verification. Montreal
Chapter

Time versus abstraction in formal description.
Bowman, H., Blair, G.S., Blair, L., Chetwynd, A.G. 1994 In: IFIP Transactions. Series C. 22, p. 407-482. 76 p.
Journal article

Time versus abstraction in formal descriptions.
Bowman, H., Blair, L., Blair, G.S., Chetwynd, A.G. 1994 In: Proceedings of the Sixth International Conference on Formal Description Techniques (Forte '93). North Holland : Elsevier
Chapter

Formal description of distributed multimedia systems.
Bowman, H., Blair, L., Blair, G.S., Chetwynd, A.G. 1993 In: Proceedings of the 9th British Colloquium for Theoretical Computer Science. York
Chapter

Some upper bounds on the list and total chromatic numbers of multigraphs.
Haggkvist, R.A., Chetwynd, A.G. 11/1992 In: Journal of Graph Theory. 16, 5, p. 503-516. 14 p.
Journal article

Alternating Hamiltonian cycles in two coloured complete bipartite graphs.
Chetwynd, A.G., Hilton, A.J.W. 06/1992 In: Journal of Graph Theory. 16, 2, p. 153-158. 6 p.
Journal article

An introduction to LOTOS through a worked example.
Drayton, L.D., Chetwynd, A.G., Blair, G.S. 03/1992 In: Computer Communications. 15, 2, p. 70-85. 16 p.
Journal article

Contribution to discussion meeting on the future of honours degree courses in mathematics and statistics.
Chetwynd, A.G., Diggle, P.J. 1992 In: Journal of the Royal Statistical Society: Series A (Statistics in Society). 155, p. 209-210. 2 p.
Journal article

Outline symmetric latin squares.
Chetwynd, A.G., Hilton, A.J.W. 10/12/1991 In: Discrete Mathematics. 97, 1-3, p. 101-117. 17 p.
Journal article

On the total chromatic number of graphs of high minimum degree.
Chetwynd, A.G., Hilton, A.J.W., Zhao, C. 10/1991 In: Journal of the London Mathematical Society. Series, 2, p. 193-202. 10 p.
Journal article

Second--order analysis of spatial clustering for inhomogeneous populations.
Diggle, P.J., Chetwynd, A.G. 1991 In: Biometrics. 47, p. 1155-1163. 9 p.
Journal article

Total colourings of graphs : a progress report.
Chetwynd, A.G. 1991 In: Graph Theory and Applications. Wiley p. 233-244. 12 p.
Chapter

The chromatic index of graphs with large maximum degree, where the number of vertices of maximum degree is relatively small.
Chetwynd, A.G., Hilton, A.J.W. 02/1990 In: Journal of Combinatorial Theory, Series B. 48, 1
Journal article

Total colourings.
Chetwynd, A.G. 1990 In: Graph colourings. Pitman p. 65-77. 13 p.
Chapter

1-factorizing regular graphs of high degree—an improved bound.
Chetwynd, A.G., Hilton, A.J.W. 05/1989 In: Discrete Mathematics. 75, 1-3, p. 103-112. 10 p.
Journal article

On the Δ-subgraph of graphs which are critical with respect to the chromatic index.
Chetwynd, A.G., Hilton, A.J.W., Hoffman, D.G. 04/1989 In: Journal of Combinatorial Theory, Series B. 46, 2, p. 240-275. 36 p.
Journal article

A note on list colourings.
Chetwynd, A.G., Haggkvist, R.A. 03/1989 In: Journal of Graph Theory. 13, 1, p. 87-95. 9 p.
Journal article

A Δ-subgraph condition for a graph to be class 1.
Chetwynd, A.G., Hilton, A.J.W. 02/1989 In: Journal of Combinatorial Theory, Series B. 46, 1, p. 37-45. 9 p.
Journal article

The edge chromatic class of graphs with maximum degree at least $|V| - 3$.
Chetwynd, A.G., Hilton, A.J.W. 1989 In: Annals of Discrete Mathematics. 41, p. 91-110. 20 p.
Journal article

Snarks and k-snarks.
Chetwynd, A.G., Hilton, A.J.W. 1988 In: Ars Combinatorica. 25C, p. 39-54. 16 p.
Journal article

Some refinements of the total chromatic number conjecture.
Chetwynd, A.G., Hilton, A.J.W. 1988 In: Congressus Numerantium. 66, p. 195-216. 22 p.
Journal article

The existence of multigraphs with a given degree sequence and given chromatic index.
Chetwynd, A.G., Hilton, A.J.W. 1988 In: Congressus Numerantium. 58, p. 347-356. 10 p.
Journal article

Decomposition of snarks.
Cameron, P.J., Cheywynd, A.G., Watkins, J.J. 1987 In: Journal of Graph Theory. 11, 1, p. 13-19. 7 p.
Journal article

The edge-chromatic class of regular graphs of degree 4 and their complements
Chetwynd, A., Hilton, A. 1987 In: Discrete Applied Mathematics. 16, 2, p. 125-134. 10 p.
Journal article

What mathematics for computer scientists
Chetwynd, A., Cooke et al, D. 1987 In: The Computer Bulletin. 3, 3, p. 36-37. 2 p.
Journal article

Critical star multigraphs.
Chetwynd, A.G., Hilton, A.J.W. 12/1986 In: Graphs and Combinatorics. 2, 1, p. 209-221. 13 p.
Journal article

Star multigraphs with three vertices of maximum degree.
Chetwynd, A.G., Hilton, A.J.W. 09/1986 In: Mathematical Proceedings of the Cambridge Philosophical Society. 100, 2, p. 303-317. 15 p.
Journal article

Regular Graphs of High Degree are 1-Factorizable.
Chetwynd, A.G., Hilton, A.J.W. 03/1985 In: Proceedings of the London Mathematical Society. Series, 2, p. 193-206. 14 p.
Journal article

Chromatic index of graphs of even order with many edges.
Chetwynd, A.G., Hilton, A.J.W. 1984 In: Journal of Graph Theory. 8, 4, p. 463-470. 8 p.
Journal article

On the intricacy of combinatorial construction problems.
Bailey, R.A., Cameron, P.J., Chetwynd, A.G., Daykin, D.E., Hilton, A.J.W., Holroyd, F.C., Mason, J.H., Nelson, R., Rowley, C.A., Woodall, D.R. 1984 In: Discrete Mathematics. 50, 1, p. 71-97. 27 p.
Journal article

Partial-edge colouring of complete graphs or of graphs which are nearly complete.
Chetwynd, A.G., Hilton, A.J.W. 1984 In: Graph theory and combinatorics : proceedings of the Cambridge Combinatorial Conference in honour of Paul Erdős. London : Academic Press p. 81-98. 18 p. ISBN: 012111760X.
Chapter

The chromatic index of graphs with at most four vertices of maximum degree.
Chetwynd, A.G., Hilton, A.J.W. 1984 In: Congressus Numerantium. 43, p. 221-248. 28 p.
Journal article

Chromatic index critical graphs of order 9.
Chetwynd, A.G., Yap, H.P. 1983 In: Discrete Mathematics. 47, 1, p. 23-33. 11 p.
Journal article

The rise and fall of the critical graph conjecture.
Chetwynd, A.G., Wilson, R.J. 1983 In: Journal of Graph Theory. 7, 2, p. 153-157. 5 p.
Journal article

Snarks and supersnarks.
Chetwynd, A.G., Wilson, J. 1981 In: The Theory and Applications of Graphs. New York : Wiley
Chapter