Clinical Practice Research Datalink (CPRD) GOLD

01/02/2024
20/05/2026
Data source
Human
Primary care medical records
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Population Qualitative Data

Population age groups

  • Paediatric Population (< 18 years)
    • Adolescents (12 to < 18 years)
  • Adult and elderly population (≥18 years)
    • Adults (18 to < 65 years)
      • Adults (18 to < 46 years)
      • Adults (46 to < 65 years)
    • Elderly (≥ 65 years)
      • Adults (65 to < 75 years)
      • Adults (75 to < 85 years)
      • Adults (85 years and over)

Estimated percentage of the population covered by the data source in the catchment area

In CPRD GOLD December 2025 there were 2,281,011 current acceptable patients (i.e. registered at currently contributing practices that use Vision software, excluding transferred out, deceased patients and those flagged by CPRD as not acceptable for clinical research for data quality issues) equal to 3.40% based on the UK population estimates of 67,026,300 from the Office of National Statistics (mid-2023). Our Oxford OMOP CDM data include 2,184,890 after excluding some patients as described for the full population below: the percentage remains the same.

Description of the population covered by the data source in the catchment area whose data are not collected (e.g., people who are registered only for private care)

CPRD GOLD December 2025 included 24,637,260 patients of which we excluded in the following order:
- 2,921,294 flagged as not acceptable for clinical research
- 1,169 with gender not equal to Male or Female
- 3 with year of birth before 1875
- 3,808,915 with practice up-to-standard after the patient died or left the practice
- 4 with first registration date after the last collection date
- 256,871 with no observations
Our Oxford OMOP CDM data include the remaining 17,649,004 patients and the numbers below refer to this OMOP CDM population.
Population

Population size

17649004

Active population size

2184890

Population by age group

Age group Population size Active population size
Paediatric Population (< 18 years)
3159153
387666
Children (2 to < 12 years)
1857078
208789
Adolescents (12 to < 18 years)
966186
148848
Adults (18 to < 46 years)
7583541
820811
Adults (46 to < 65 years)
3393488
543167
Elderly (≥ 65 years)
3512822
433246
Adults (65 to < 75 years)
1389462
228904
Adults (75 to < 85 years)
1198583
150140
Adults (85 years and over)
924777
54202
Median observation time

Median time (years) between first and last available records for unique individuals

5.90

Median time (years) between first and last available records for unique active individuals (alive and currently registered)

12.96