In association with

  • West
  • NHS


Treatment benefits

Positive patient-relevant outcome associated with an intervention, quantifiable by epidemiological measures such as absolute risk reduction (ARR) and number needed to treat (NNT).

TRIP Database

The TRIP Database is a medical search engine with emphasis on evidence-based medicine (EBM) and clinical guidelines and queries, including content from Cochrane and Bandolier. Designed to find and use high-quality clinical research evidence from medical literature for clinical practice. Sign-up to Trip to save searches, get tailored results sent to you, and to see what articles are available in NBT libraries or with an NBT online access.


The extent to which a variable or intervention measures what it is supposed to measure, or accomplishes what it is supposed to accomplish. The internal validity of a study refers to the integrity of the experimental design. The external validity of a study refers to the appropriateness by which its results can be applied to non-study patients or populations.


Observable, measurable (or categorisable) characteristics that vary among cases in a study e.g. height, weight, blood pressure, gender, eye colour and length of hospital stay.
In an experiment, the independent variable is the variable that is varied or manipulated by the researcher, and the dependent variable is the response that is measured. An independent variable is the presumed cause, whereas the dependent variable is the presumed effect.


The West of England Academic Health Science Network (WEASHN) is a diverse network of NHS care providers in universities, industry and commissioning concerned with innovative, evidence-based practice to improve health and care quality.

York CRD (Centre for Reviews and Dissemination)

The York University Centre for Reviews and Dissemination databases provide access to systematic reviews, economic evaluations, summaries of completed and on-going health technology assessments (HTAs) and summaries of all Cochrane reviews.