Data sources used by Scottish ministers
Ministers rely on national vital statistics, NHS Scotland health records, and the Scottish Index of Multiple Deprivation to build a baseline of mortality rates. These datasets provide age‑specific death counts, cause‑of‑death breakdowns, and socioeconomic context, all of which are essential for projecting future longevity.
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Actuarial modelling approach
Actuaries apply cohort and period life‑table methods. Cohort tables follow a group born in the same year, adjusting for observed improvements in mortality. Period tables treat each year's mortality rates as if they applied to all ages, giving a snapshot that can be smoothed to predict trends. The chosen model depends on data completeness and the insurance product's time horizon.
Key variables influencing life expectancy
Several factors are weighted in the calculations:
- Age and gender – fundamental demographic drivers.
- Geographic region – urban areas like Glasgow show slightly lower expectancy due to higher deprivation.
- Health behaviours – smoking prevalence, obesity rates, and alcohol consumption are incorporated from public‑health surveys.
- Medical advances – improvements in cardiovascular treatment and cancer survival are modeled as incremental mortality reductions.
Adjustments for policy-specific needs
Insurance products often require bespoke adjustments. For term life policies, a shorter horizon may use more recent mortality improvements, while annuities for retirees incorporate longer‑term trends and potential future health gains. Ministers provide guidance tables that insurers can adapt with risk‑loading factors.
Comparative table of life‑table types
| Table type | Focus | Typical use in insurance |
|---|---|---|
| Cohort life table | Tracks a birth‑year group over time | Long‑term annuities, pension projections |
| Period life table | Snapshot of current mortality rates | Term life, short‑term policies |
| Adjusted mortality table | Incorporates health‑behaviour and regional modifiers | Customized products, high‑risk underwriting |
Transparency and updates
Ministers publish the underlying data and assumptions annually in the Scottish Government's statistical releases. Insurers are expected to reference the latest version, ensuring premiums reflect current longevity expectations and that policyholders receive fair pricing.