Readmission
A readmission is a further hospital admission soon after discharge, often within 30 days, used to judge inpatient care quality and counted as a cost.
Encyclopaedia
Explore comprehensive, evidence-informed explanations of key health economics concepts, including their development, application and relationships to other concepts. Published entries are validated through human expert review.
Concepts, entries and ontology terms
A concept page is a published entry on the wiki. Some concepts also have a full encyclopaedia article. The Health Economics Ontology (HEO) holds every concept, including dictionary terms without an article, so it is larger than the list of published pages. The knowledge graph shows how concepts relate to each other.
Real Option Value
Real option value is the extra health gain a treatment creates by keeping patients alive and eligible long enough to benefit from future innovations.
Real-World Data
Routinely collected information about patient health or healthcare delivery that may support research and decision making when fit for a defined purpose.
Real-World Evidence
Clinical evidence about a medical product's use, benefits, or risks derived from analysing real-world data, unlike evidence from a controlled trial.
Record Linkage
Record linkage is a data preparation method that finds records of the same person across health datasets, such as trial files and hospital episodes.
Reference Case
A reference case is the set of methods, such as perspective, outcome measure and discounting, that HTA bodies like NICE expect economic evaluations to use.
Reference Case Requirement
Reference case requirement is one rule in an HTA reference case, such as NICE's 3.5% discount rate, fixing a method like perspective or outcome measure.
Reference Standard
The reference standard is the best available method for deciding whether a target condition is present, against which a test's accuracy is judged.
Regression Analysis
Regression analysis is a set of statistical methods estimating how an outcome such as cost, QALYs or event risk varies with treatment and patient factors.
Relapse Period (REL)
Relapse period (REL) is the Q-TWiST health state covering survival time after relapse or progression, weighted by its own utility.
Relapse-Free Survival
Relapse-free survival (RFS) is the time from randomisation, or another stated start such as surgery, to relapse of the disease or death from any cause.
Relative Risk
Relative risk (RR) is the ratio of event risks in two groups over the same period, the treatment effect a decision model multiplies by a baseline risk.
Relative Risk Reduction
Relative risk reduction (RRR) is the percentage by which a treatment lowers the risk of an event compared with control, equal to one minus the risk ratio.
Relative Survival
Relative survival is patients' observed survival divided by the expected survival of a matched general population, used in cancer registries and models.
Relative Survival Model
A statistical model estimating disease-specific survival by comparing observed survival against expected general population survival, without individual cause-of-death data.
Relative Value Unit
A relative value unit (RVU) is a weight for the resources a physician service uses relative to others, which Medicare turns into fee schedule payments.
Relative Weight
A numerical value assigned to a payment classification, such as a diagnosis-related group, reflecting its expected resource intensity relative to average.
Reliability Assessment
An evaluation of the consistency and reproducibility of an instrument's results, covering internal consistency, inter-rater, and test-retest reliability.
ReQoL-10
ReQoL-10 is the 10-item Recovering Quality of Life questionnaire for mental health service users, scored as a total or as ReQoL-UI utilities for QALYs.
ReQoL-20
ReQoL-20 is the 20-item Recovering Quality of Life questionnaire for mental health service users, used at assessment and as a trial and research outcome.