User profiles for "author:Gareth Ambler"
 | Gareth AmblerUniversity College London Verified email at ucl.ac.uk Cited by 12255 |
Review and evaluation of penalised regression methods for risk prediction in low‐dimensional data with few events
Risk prediction models are used to predict a clinical outcome for patients using a set of
predictors. We focus on predicting low‐dimensional binary outcomes typically arising in …
predictors. We focus on predicting low‐dimensional binary outcomes typically arising in …
[HTML][HTML] Sample size calculation for a stepped wedge trial
Abstract Background Stepped wedge trials (SWTs) can be considered as a variant of a
clustered randomised trial, although in many ways they embed additional complications …
clustered randomised trial, although in many ways they embed additional complications …
Microbleeds, cerebral hemorrhage, and functional outcome after stroke thrombolysis: individual patient data meta-analysis
Background and Purpose—We assessed whether the presence, number, and distribution of
cerebral microbleeds (CMBs) on pre-intravenous thrombolysis MRI scans of acute ischemic …
cerebral microbleeds (CMBs) on pre-intravenous thrombolysis MRI scans of acute ischemic …
[HTML][HTML] Clinical features of vaccine-induced immune thrombocytopenia and thrombosis
Background Vaccine-induced immune thrombocytopenia and thrombosis (VITT) is a new
syndrome associated with the ChAdOx1 nCoV-19 adenoviral vector vaccine against severe …
syndrome associated with the ChAdOx1 nCoV-19 adenoviral vector vaccine against severe …
The use of fractional polynomials to model continuous risk variables in epidemiology.
BACKGROUND: The traditional method of analysing continuous or ordinal risk factors by
categorization or linear models may be improved. METHODS: We propose an approach …
categorization or linear models may be improved. METHODS: We propose an approach …
[HTML][HTML] How to develop a more accurate risk prediction model when there are few events
How to develop a more accurate risk prediction model when there are few events | The BMJ
Skip to main content Intended for healthcare professionals Access provided by Google Indexer …
Skip to main content Intended for healthcare professionals Access provided by Google Indexer …
[HTML][HTML] Selective laser trabeculoplasty versus eye drops for first-line treatment of ocular hypertension and glaucoma (LiGHT): a multicentre randomised controlled trial
Background Primary open angle glaucoma and ocular hypertension are habitually treated
with eye drops that lower intraocular pressure. Selective laser trabeculoplasty is a safe …
with eye drops that lower intraocular pressure. Selective laser trabeculoplasty is a safe …
Effect of robot-assisted radical cystectomy with intracorporeal urinary diversion vs open radical cystectomy on 90-day morbidity and mortality among patients with …
Importance Robot-assisted radical cystectomy is being performed with increasing frequency,
but it is unclear whether total intracorporeal surgery improves recovery compared with open …
but it is unclear whether total intracorporeal surgery improves recovery compared with open …
Generic, simple risk stratification model for heart valve surgery
Background—Heart valve surgery has an associated in-hospital mortality rate of 4% to 8%.
This study aims to develop a simple risk model to predict the risk of in-hospital mortality for …
This study aims to develop a simple risk model to predict the risk of in-hospital mortality for …
Ethnic group differences in overweight and obese children and young people in England: cross sectional survey
Aims: To determine the percentage of children and young adults who are obese or
overweight within different ethnic and socioeconomic groups. Methods: Secondary analysis …
overweight within different ethnic and socioeconomic groups. Methods: Secondary analysis …