All Outputs (85)

Event count distributions from renewal processes : fast computation of probabilities (2017)
Journal Article
Baker, R., & Kharrat, T. (2017). Event count distributions from renewal processes : fast computation of probabilities. IMA Journal of Management Mathematics, 29(4), 415-433. https://doi.org/10.1093/imaman/dpx008

Discrete distributions derived from renewal processes, i.e. distributions of the number of events by some time t are beginning to be used in management science, econometrics and health sciences. A new fast method is presented for computation of the p... Read More about Event count distributions from renewal processes : fast computation of probabilities.

Meta-analysis of tumour burden in pre-operative axillary ultrasound positive and negative breast cancer patients (2017)
Journal Article
Ahmed, M., Jozsa, F., Baker, R., Rubio, I., Benson, J., & Douek, M. (2017). Meta-analysis of tumour burden in pre-operative axillary ultrasound positive and negative breast cancer patients. Breast Cancer Research and Treatment, 166(2), 329-336. https://doi.org/10.1007/s10549-017-4405-3

Management of the axilla in breast cancer is becoming increasingly conservative. Patients identified with a low axillary nodal burden (two or fewer involved nodes) at sentinel node biopsy (SNB) can avoid completion axillary node clearance (cANC). 'Fa... Read More about Meta-analysis of tumour burden in pre-operative axillary ultrasound positive and negative breast cancer patients.

Paule-Mandel estimators for network meta-analysis with random inconsistency effects (2017)
Journal Article
Jackson, D., Veroniki, A., Law, M., Tricco, A., & Baker, R. (2017). Paule-Mandel estimators for network meta-analysis with random inconsistency effects. Research Synthesis Methods, 8(4), 416-434. https://doi.org/10.1002/jrsm.1244

Network meta-analysis is used to simultaneously compare multiple treatments in a single analysis. However, network meta-analyses may exhibit inconsistency, where direct and different forms of indirect evidence are not in agreement with each other, ev... Read More about Paule-Mandel estimators for network meta-analysis with random inconsistency effects.

Creating new distributions by blunting cusps (2017)
Journal Article
Baker, R. (2017). Creating new distributions by blunting cusps. Statistics and Probability Letters, 124, 55-63. https://doi.org/10.1016/j.spl.2017.01.003

A simple method is proposed for `blunting' cusped distributions, ie removing the cusp. No additional parameters are required.
The method is applied to the asymmetric Laplace distribution, to the van Dorp and Kotz double-sided power distribution,
an... Read More about Creating new distributions by blunting cusps.

Is blue dye still required during sentinel lymph node biopsy for breast cancer? (2016)
Journal Article
Peek, M., Kovacs, T., Baker, R., Hamed, H., Kothari, A., & Douek, M. (2016). Is blue dye still required during sentinel lymph node biopsy for breast cancer?. ecancermedicalscience, 10, https://doi.org/10.3332/ecancer.2016.674

BACKGROUND:

In early breast cancer, the optimal technique for sentinel lymph node biopsy (SLNB) is the combined technique (radioisotope and Patent Blue V) which achieves high identification rates. Despite this, many centres have decided to stop us... Read More about Is blue dye still required during sentinel lymph node biopsy for breast cancer?.

Meta-analysis of sentinel lymph node biopsy in breast cancer using the magnetic technique (2016)
Journal Article

Background
3 The gold standard for sentinel lymph node biopsy (SLNB), the dual technique (radiolabelled tracer and
4 blue dye), has several drawbacks. A novel magnetic technique without these drawbacks, has been
5 evaluated in a number of clinical... Read More about Meta-analysis of sentinel lymph node biopsy in breast cancer using the magnetic technique.

Meta-analysis of aberrant lymphatic drainage in recurrent breast cancer (2016)
Journal Article
Ahmed, M., Baker, R., & Rubio, I. (2016). Meta-analysis of aberrant lymphatic drainage in recurrent breast cancer. British Journal of Surgery, 103(12), 1579-1588. https://doi.org/10.1002/bjs.10289

Background
Sentinel node biopsy (SNB) in recurrent breast cancer offers targeted axillary staging compared with axillary lymph node dissection (ALND) or no treatment. The evidence for lymphatic mapping in recurrent breast cancer is reviewed, focusi... Read More about Meta-analysis of aberrant lymphatic drainage in recurrent breast cancer.

Minimally invasive ablative techniques in the treatment of breast cancer: a systematic review and meta-analysis (2016)
Journal Article
Peek, M., Ahmed, M., Napoli, A., Usiskin, S., Baker, R., & Douek, M. (2016). Minimally invasive ablative techniques in the treatment of breast cancer: a systematic review and meta-analysis. International Journal of Hyperthermia, 33(2), 191-202. https://doi.org/10.1080/02656736.2016.1230232

Purpose: Breast conserving surgery is effective for breast cancer treatment but is associated
with morbidity in particular high re-excision rates. We performed a systematic review to
assess the current evidence for clinical outcomes with minimally... Read More about Minimally invasive ablative techniques in the treatment of breast cancer: a systematic review and meta-analysis.

An empirical Bayes model for time-varying paired comparisons ratings : who is the greatest women’s tennis player? (2016)
Journal Article

We present a methodology for fitting a time-varying paired comparisons model using an empirical Bayes approach. The model simultaneously avoids two problems that typically arise with paired comparisons data: first, that extreme values of estimated st... Read More about An empirical Bayes model for time-varying paired comparisons ratings : who is the greatest women’s tennis player?.

Predicting creditworthiness in retail banking with limited scoring data (2016)
Journal Article

The preoccupation with modelling credit scoring systems including their relevance to predicting and decision making in the financial sector has been with developed countries, whilst developing countries have been largely neglected. The focus of our i... Read More about Predicting creditworthiness in retail banking with limited scoring data.

The compatriot win effect on national sales of a multicountry lottery (2016)
Journal Article

Euromillions is a lotto game played across nine countries.We examine more than 8
years of sales data for individual states to assess whether a jackpot win in a country increases
subsequent sales in that country.We propose a novel test for the prese... Read More about The compatriot win effect on national sales of a multicountry lottery.

Magnetic sentinel lymph node biopsy in a murine tumour model (2015)
Journal Article

The magnetic technique for sentinel node biopsy provides a radioisotope-free alternative for staging breast cancer. It requires refinement
to reduce “residual iron content” at injection sites by maximising lymphatic uptake to prevent “void artefacts... Read More about Magnetic sentinel lymph node biopsy in a murine tumour model.

New models for describing outliers in meta-analysis (2015)
Journal Article
Baker, R., & Jackson, D. (2015). New models for describing outliers in meta-analysis. Research Synthesis Methods, 7(3), 314-328. https://doi.org/10.1002/jrsm.1191

An unobserved random effect is often used to describe the between-study variation that is apparent in
meta-analysis datasets. A normally distributed random effect is conventionally used for this purpose. When
outliers or other unusual estimates are... Read More about New models for describing outliers in meta-analysis.

Approximate confidence intervals for moment-based estimators of the between-study variance in random effects meta-analysis (2015)
Journal Article
effects meta-analysis. Research Synthesis Methods, 6(4), 372-382. https://doi.org/10.1002/jrsm.1162

Moment-based estimators of the between-study variance are very popular when performing random effects
meta-analyses. This type of estimation has many advantages including computational and conceptual
simplicity. Furthermore, by using these estimato... Read More about Approximate confidence intervals for moment-based estimators of the between-study variance in random effects meta-analysis.

Deliberations on jury service (2015)
Journal Article
Baker, R. (2015). Deliberations on jury service. Mathematics today, 51(4), 194-185

Mathematical reflections on doing jury duty, emphasizing the probability of being called up for duty, and how improvements could be made. An improved selection method that would avoid some people being called up more than once is discussed.

An empirical Bayes' procedure for ranking players in Ryder Cup golf (2015)
Journal Article
Baker, R., & McHale, I. (2015). An empirical Bayes' procedure for ranking players in Ryder Cup golf. Journal of Applied Statistics, 43(3), 387-395. https://doi.org/10.1080/02664763.2015.1043869

We describe a model to obtain strengths and rankings of players appearing in golf's Ryder Cup. Obtaining rankings is complicated because of two reasons. First, competitors do not compete on an equal number of occasions, with some competitors appearin... Read More about An empirical Bayes' procedure for ranking players in Ryder Cup golf.

Effects of shoe sole geometry on toe clearance and walking stability in older adults (2015)
Journal Article

Thirty-five percent of people above age 65 fall each year, and half of their falls are associated with tripping: tripping, an apparently ‘mundane’ everyday problem, therefore significantly impacts on older people's health and associated medical costs... Read More about Effects of shoe sole geometry on toe clearance and walking stability in older adults.

A cricoid cartilage compression device for the accurate and reproducible application of cricoid pressure (2015)
Journal Article
reproducible application of cricoid pressure. Anaesthesia, 70(1), 18-25. https://doi.org/10.1111/anae.12829

We describe the development and laboratory assessment of a refined prototype tactile feedback device for the safe
and accurate application of cricoid pressure. We recruited 20 operating department practitioners and compared their
performance of cri... Read More about A cricoid cartilage compression device for the accurate and reproducible application of cricoid pressure.

Analysing deviation-from-target data : Applying the correct force in Sellick’s maneuver (2015)
Journal Article
Baker, R., Taylor, R., Smurthwaite, G., Kitchen, G., & Mehmood, I. (2015). Analysing deviation-from-target data : Applying the correct force in Sellick’s maneuver. Journal of Biopharmaceutical Statistics, 25(4), 619-634. https://doi.org/10.1080/10543406.2014.920872

The problem of comparing the deviation from a target of two or more treatments or procedures
arises now and again in medicine. Practitioners usually carry out a t-test on a loss
function such as absolute error. We have adapted and developed statist... Read More about Analysing deviation-from-target data : Applying the correct force in Sellick’s maneuver.

A new fast LDI for assessment of burns: a multi-centre clinical evaluation (2014)
Journal Article
Hoeksema, H., Baker, R., Holland, A., Travis, P., Steven, L., Jeffery, J., & Monstrey, S. (2014). A new fast LDI for assessment of burns: a multi-centre clinical evaluation. Burns, 40(7), 1274-1282. https://doi.org/10.1016/j.burns.2014.04.024

INTRODUCTION:

Laser Doppler imaging (LDI) provides early accurate determination of wound healing potential. LDI can scan large areas of up to 2500 cm2 within 2 min. This duration may require additional sedation in a mobile, uncooperative child. In... Read More about A new fast LDI for assessment of burns: a multi-centre clinical evaluation.