Dictionary

S

Skilled Nursing FacilityTermSNF, Nursing Facility

A facility providing round-the-clock nursing and rehabilitative care for patients no longer needing hospital-level care but still needing medical support.

Sleep QualityTermSleep Health, Quality of Sleep

A clinical outcome measure capturing a person's subjective assessment of their sleep, including duration, latency, and disturbances, using a validated questionnaire.

Slope Index of InequalityConceptSII, Absolute Inequality Slope

A summary measure of absolute health inequality across a socioeconomic gradient, estimated using regression across the full distribution rather than two extremes.

Small Area VariationTermGeographic Variation, Regional Variation

The phenomenon in which healthcare utilisation rates for the same condition differ substantially across small geographic areas, unexplained by population health need.

Small Group MarketTermSmall Employer Market, SHOP Market

The insurance market segment serving employers below a defined size threshold, typically with specific protections such as guaranteed issue and limited rate variation.

Small Population ChallengeTermSmall Sample Challenge, Limited Evidence Challenge

The methodological difficulty of generating robust clinical evidence when a disease affects only a small number of patients, limiting conventional trial feasibility.

Small Study EffectsTermSmall-Study Bias, Small Trial Effect

A pattern in meta-analysis where smaller studies tend to report systematically larger treatment effects than larger studies, possibly reflecting publication bias.

Smart AlertTermIntelligent Alert, Context-Aware Alert

A computerised clinical alert using more sophisticated logic, such as patient-specific risk factors, to reduce clinically insignificant notifications compared with simpler rule-based alerts.

Smart Device HealthTermSmart Health Device, IoT Health Device

A category of connected electronic devices with embedded computing capability used to monitor or manage health, from fitness trackers to medical-grade devices.

SMCTermScottish Medicines Consortium, Scotland HTA

The Scottish Medicines Consortium, advising Scotland's NHS boards on the clinical and cost-effectiveness of newly licensed medicines for local formulary decisions.

SMR RatingTermService Medical Rendu, French SMR

A French assessment classification rating a treatment's absolute medical benefit, separate from its comparative improvement over alternatives, informing coverage rate.

Sobol IndicesConceptSobol Sensitivity Indices, Variance Decomposition Indices

Variance-based global sensitivity measures that attribute a model output’s variance to uncertain inputs and their interactions under specified input distributions.

Sobol SequenceConceptSobol Low-Discrepancy Sequence, Quasi-Random Sequence

A method generating a sequence of points that fills a multidimensional space more evenly than simple random sampling, improving simulation efficiency.

Social CareTermSocial Services Support, Personal Care Support

In health economics, personal and practical support for people with needs arising from age, disability or illness, distinct from and often costed alongside medical care.

Social Determinants of HealthTermSDOH, Social Determinants

The conditions in which people are born, grow, live, work, and age, such as income and education, that shape health outcomes.

Social Discount RateTermSocial Time Preference Rate, Societal Discount Rate

The rate at which government or society as a whole is considered to discount future costs and benefits, used in public sector evaluation.

Social EpidemiologyTermSocietal Epidemiology, Social Determinants Epidemiology

A branch of epidemiology studying how social structures and conditions, such as income inequality, affect the distribution of health and disease.

Social EvidenceTermSocietal Evidence, Social Context Evidence

Information addressing the broader social context of an assessment decision, such as its effect on carers, employment, or social participation.

Social FeasibilityTermSocial Acceptability, Public Acceptability

An assessment of whether a policy is likely to be accepted and complied with by the population it affects, considering cultural norms.

Social FunctioningTermSocial Function, Social Role Functioning

A broader construct covering an individual's overall capacity for social engagement and relationships, often assessed as a composite scale.

Social Health InsuranceConceptSHI, Compulsory Health Insurance

Social health insurance is a publicly mandated arrangement that pools prepaid funds, commonly from compulsory contributions and public transfers, to finance defined health care entitlements for covered people.

Social Impact BondTermSIB, Pay-for-Success Bond

A financing mechanism where private investors fund a social programme upfront, repaid by government or a donor only if verified results are achieved.

Social Insurance ContributionTermSHI Contribution, Health Insurance Contribution

A mandatory payment, typically a percentage of income, made into a social insurance scheme to fund healthcare or other benefits.

Social Media DataTermSocial Media Health Data, Digital Trace Data

Information from public posts and interactions on social media platforms, explored as a novel source for monitoring sentiment and disease surveillance.

Social Norm InterventionTermSocial Norms Nudge, Normative Feedback

An intervention that tells people about the behaviour or attitudes of others to influence their own behaviour.

Social Norms ConceptTermSocial Norms, Descriptive Norms

A theory that behaviour is shaped by perceived descriptive norms, what others actually do, and injunctive norms, what others approve of.

Social Return on InvestmentConceptSROI, Social ROI

A framework extending conventional return on investment analysis by monetising broader social, environmental, and health outcomes alongside financial returns.

Social Value CriterionTermSocietal Value Criterion, Social Priority Criterion

A standard reflecting society's broader values and priorities, such as fairness, used to inform a decision beyond pure cost-effectiveness.

Social WelfareTermSocietal Welfare, Aggregate Wellbeing

The overall wellbeing of a society, treated as some aggregation of the wellbeing of its individual members under a specified welfare function.

Social Welfare FunctionConceptSWF, Welfare Aggregation Function

A social welfare function (SWF) combines individual health or wellbeing into overall social welfare, setting how equality is weighed against the total.

Societal CostTermSocietal Perspective Cost, Total Social Cost

The total cost of an intervention from the broadest perspective, covering direct healthcare, direct non-medical, and indirect costs regardless of who bears them.

Societal PerspectiveConceptSocial Perspective, Whole-Society Viewpoint

The societal perspective is an economic evaluation viewpoint that counts all costs and outcomes, whoever bears them, including productivity and carer time.

Societal ValueTermSocial Value, Broad Value

The total benefit a technology provides from the broadest perspective, covering direct patient health, caregiver burden, productivity, and other societal effects.

Socioeconomic AdjustmentTermSocioeconomic Risk Adjustment, Deprivation Adjustment

A modification to a risk adjustment or payment formula accounting for added costs of caring for socioeconomically disadvantaged populations.

Soft Budget ConstraintTermSoft Budget, Bailout Expectation

A situation where an organisation expects that any budget overrun will be covered by an external authority rather than facing full financial consequences.

Soft EndpointTermSubjective Endpoint, Soft Outcome

A trial outcome relying on subjective clinical judgement, such as a physician's severity assessment, unlike an objectively defined hard endpoint.

Software ValidationTermFit-for-Purpose Check, Validation Testing

The process of confirming that software fulfils its intended purpose and produces results that are suitable for its intended use.

Software VerificationTermCode Verification, Specification Conformance

The process of confirming that software correctly implements its specified requirements and performs as intended.

Solo PracticeTermSingle-Physician Practice, Solo Practitioner

A medical practice owned and operated by a single physician, unlike a group practice sharing resources and administration.

SolvencyTermAbility to Pay Debts, Long-Term Viability

The financial capacity of an organisation, such as an insurer or hospital, to meet its long-term financial obligations as they come due.

Source CodeTermProgram Listing, Model Codebase

The human-readable set of instructions making up a model's underlying programming, unlike compiled code translated into an executable but unreadable format.

Southeast QuadrantTermSE Quadrant, Dominant Quadrant

The region of the cost-effectiveness plane where a new intervention is both less costly and more effective than its comparator.

Southwest QuadrantTermSW Quadrant, Less-Costly-Less-Effective Quadrant

The region of the cost-effectiveness plane where a new intervention is both less costly and less effective than its comparator.

Spearman CorrelationConceptSpearman Rank Correlation, Spearman's Rho

A non-parametric measure of the monotonic relationship between two ranked variables, calculated from data ranks rather than raw values.

Special Access SchemeTermSpecial Access Programme, Serious-Condition Access

A pathway letting patients with a serious condition access a not-yet-approved treatment, typically requiring physician application and case-specific justification.

Special Cause VariationTermAssignable Cause Variation, Special-Cause Signal

Variation resulting from a specific, identifiable factor outside a stable system's normal randomness, unlike common cause variation.

Special Pricing ArrangementTermSPA

Special pricing arrangement, in PBS listing, publishes a higher price while the sponsor pays quarterly rebates down to the effective price under a deed.

Specialist Care CoverageTermSpecialist Coverage, Specialised Care Coverage

A measure of the extent to which a population has access to needed specialised medical care beyond basic primary care.

Specialty AccessTermSpecialty Care Access, Access to Specialists

A healthcare access dimension concerning patients' ability to obtain care from specialist providers, often more limited in supply than primary care.

Specialty DrugTermSpecialty Medication, High-Cost Drug

A category of typically high-cost medications treating complex or rare conditions, often requiring special handling and reimbursed at a distinct, higher tier.