Chris Todd

Prof. Dr. Chris Todd


Research Focus & Metrics

Academic Career Length

43Years (1984-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 November 2005 in Age and Ageing
Verified
Journal Article
Open access
PDF file
LYLucy Yardley
Lucy Yardley
NBNina Beyer
Nina Beyer
KHKlaus Hauer
Klaus Hauer
GKGertrudis Kempen
Gertrudis Kempen
CPChantal Piot-Ziegler
Chantal Piot-Ziegler
CTChris Todd
Chris Todd
Background: there is a need for a measure of fear of falling that assesses both easy and difficult physical activities and social activities and is suitable for use in a range of languages and cultural contexts, permitting direct comparison between studies and populations in different countries and settings. Objective: to develop a modified version of the Falls Efficacy Scale to satisfy this need, and to establish its psychometric properties, reliability, and concurrent validity (i.e. that it demonstrates the expected relationship with age, falls history and falls risk factors). Design: cross-sectional survey. Setting: community sample. Method: 704 people aged between 60 and 95 years completed The Falls Efficacy Scale-International (FES-I) either in postal self-completion format or by structured interview. Results: the FES-I had excellent internal and test–retest reliability (Cronbach’s α=0.96, ICC=0.96). Factor analysis suggested a unitary underlying factor, with two dimensions assessing concern about less demanding physical activities mainly in the home, and concern about more demanding physical activities mainly outside the home. The FES-I had slightly better power than the original FES items to discriminate differences in concern about falling between groups differentiated by sex, age, occupation, falls in the past year, and falls risk factors (chronic illness, taking multiple or psychoactive medications, dizziness). Conclusions: the FES-I has close continuity with the best existing measure of fear of falling, excellent psychometric properties, and assesses concerns relating to basic and more demanding activities, both physical and social. Further research is required to confirm cross-cultural and predictive validity.

11 October 2007 in Age and Ageing
Verified
Journal Article
Open access
PDF file
GKGertrudis I. J. M. Kempen
Gertrudis I. J. M. Kempen
LYLucy Yardley
Lucy Yardley
JHJolanda C. M. Van Haastregt
Jolanda C. M. Van Haastregt
GZG. A. Rixt Zijlstra
G. A. Rixt Zijlstra
NBNina Beyer
Nina Beyer
CTChris Todd
Chris Todd
Background: the 16-item Falls Efficacy Scale-International (FES-I) has been shown to have excellent reliability and construct validity. However, for practical and clinical purposes, a shortened version of the FES-I would be useful. Objective: to develop and validate a shortened version of FES-I while preserving good psychometric properties. Design: initial development of a shortened version using data from a UK survey (Short FES-I; n = 704), test of reliability and validity of the Short FES-I using data from a Dutch survey ( n = 300). Setting: community samples. Methods: comparison of reliability and validity of the Short FES-I and the FES-I in a random sample of 193 people aged between 70 and 92. Results: the internal and 4-week test–retest reliability of the Short FES-I is excellent (Cronbach's alpha 0.92, intra-class coefficient 0.83) and comparable to the FES-I. The correlation between the Short FES-I and the FES-I is 0.97. Patterns in differences with respect to mean scores according to age, sex, falls history, and overall fear of falling are similar for the Short FES-I and the FES-I. The FES-I had slightly better power to discriminate between groups differentiated by age, sex, falls history, and fear falling, but differences are small. Conclusions: the Short FES-I is a good and feasible measure to assess fear of falling in older persons. However, if researchers or clinicians are particularly interested in the distributions of specific fear of falling-related activities not included in the Short FES-I, the use of the full FES-I is recommended.

1 January 1999 in Quality of Life Research
Verified
Journal Article
Closed access
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CBC. Bradley
C. Bradley
CTChris Todd
Chris Todd
TGT. Gorton
T. Gorton
ESE. Symonds
E. Symonds
AMA. Martin
A. Martin
RPR. Plowright
R. Plowright

1 January 2006 in Age and Ageing
Verified
Journal Article
Open access
PDF file
KHKlaus Hauer
Klaus Hauer
Sarah LambSarah Lamb
Sarah Lamb
EJEllen C. Jorstad
Ellen C. Jorstad
CTChris Todd
Chris Todd
CBClemens Becker
Clemens Becker
Objective: to review systematically the range of case definitions and methods used to measure falls in randomised controlled trials. Design/methods: a Cochrane review of fall prevention interventions was used to identify fall definitions in published trials. Secondary searches of various databases were used to identify additional methodological or theoretical papers. Two independent reviewers undertook data extraction, with adjudication by a third reviewer in cases of disagreement. Settings: community-dwelling and institutionalised older persons. Results: 90 publications met the predefined inclusion criteria. Of these, 44 provided no definition of the term fall. In the remainder, there were substantial variations in the definition and methods of measuring falls. Reporting periods ranged from 1 week to 4 years with only 41% using prospective data collection methods. Conclusion: the standard of reporting falls in published trials is poor and significantly impedes comparison between studies. The review has been used to inform an international consensus exercise to make recommendations for a core set of outcome measures for fall prevention trials.

1 August 1999 in Osteoporosis International
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Journal Article
Closed access
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PLP. Lips
P. Lips
CCC. Cooper
C. Cooper
DAD. Agnusdei
D. Agnusdei
FCF. Caulin
F. Caulin
PEP. Egger
P. Egger
FOFor The Working Party For Quality Of Life Of The European Foundation For Osteoporosis
For The Working Party For Quality Of Life Of The European Foundation For Osteoporosis

24 April 2013 in BMC Medicine
Verified
Journal Article
Open access
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IHIrene J Higginson
Irene J Higginson
CECatherine J Evans
Catherine J Evans
GGGunn Grande
Gunn Grande
NPNancy Preston
Nancy Preston
MMMyfanwy Morgan
Myfanwy Morgan
CTChris Todd
Chris Todd
Despite being a core business of medicine, end of life care (EoLC) is neglected. It is hampered by research that is difficult to conduct with no common standards. We aimed to develop evidence-based guidance on the best methods for the design and conduct of research on EoLC to further knowledge in the field.