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North Somerset local authority · 2021

The missing millions — locally

9.2%

Adults estimated to have undiagnosed hypertension.

Estimated prevalence of undiagnosed adult hypertension · Persons, 16+ yrs

England: 8.6% · 2021

healthcards · North Somerset · 2021

What this means

An estimated 16,527 adults in North Somerset have high blood pressure without knowing it — on top of those diagnosed. That is why blood-pressure checks in pharmacies, GP surgeries and community events matter.

95% confidence interval: 8.8–9.9 %. Source population denominator: 179,245 (Persons, 16+ yrs); this measure is modelled, not a direct count of cases.

Fingertips marks this indicator Not compared to England — shown for context only.

Recorded value (North Somerset)

  1. 2021: 9.2%

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Source & provenance

Indicator:
Estimated prevalence of undiagnosed adult hypertension (ID 94111)
Source:
OHID, based on ONS and NHS England data (Health Survey for England modelling)
Area:
North Somerset (E06000024), Upper-tier local authority (post Apr 2023)
Period:
2021; retrieved 2026-10-13 (distinct from reporting period)
Population:
Persons, 16+ yrs
Note:
Modelled estimate from Health Survey for England, applied to 2021.

View source ↗

Caveats

  • A 2021 modelled estimate. Treat as a ballpark, not a precise count.
  • Built from Health Survey for England blood-pressure measurements and reported diagnosis, then modelled to local populations.
  • Blood-pressure threshold used: 140/90 mmHg or above.
  • Lower means fewer adults walking around with unknown high blood pressure.

Missing or suppressed values are never shown as zero — every card above passed validation with a real numeric value.