J P Nicholl

An epistemology of patient safety research: a framework for study design and interpretation. Part 2. Study design

Celia Brown, Timothy P. Hofer, Amanpreet Johal et al. · BMJ Quality & Safety · 2008 · 190 citations

Health Professions, Health Services Administration, Hazard Identification +11

Impact of the urgent care telephone service NHS 111 pilot sites: a controlled before and after study

Janette Turner, Alicia O’Cathain, Emma Knowles et al. · BMJ Open · 2013 · 112 citations · Full text

Public Affairs, Emergency Medical Services, Emergency Medicine +17

An epistemology of patient safety research: a framework for study design and interpretation. Part 3. End points and measurement

Celia Brown, Timothy P. Hofer, Amanpreet Johal et al. · BMJ Quality & Safety · 2008 · 103 citations

Pharmacy, Risk Management, Method Validation +11

Missing steps in a staircase: a qualitative study of the perspectives of key stakeholders on the use of adaptive designs in confirmatory trials

Munyaradzi Dimairo, Jonathan Boote, Steven A. Julious et al. · Trials · 2015 · 56 citations · Full text

Public Health, Biostatistics, Clinical Trial Regulation +15

Case-mix adjusted hospital mortality is a poor proxy for preventable mortality: a modelling study

Alan Girling, Timothy P. Hofer, Jianhua Wu et al. · BMJ Quality & Safety · 2012 · 54 citations · Full text

Business, Health Care Management, Clinical Epidemiology +15