Population Qualitative Data

Population age groups

Paediatric Population (< 18 years)
Adolescents (12 to < 18 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 January 2025 there were 2,730,707 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 4.07% based on the UK population estimates of 67,026,300 from the Office of National Statistics (mid-2023). Our Oxford OMOP CDM data include 2,730,170 after excluding 537 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 January 2025 included 24,499,592 patients of which we excluded in the following order:
- 2,912,952 flagged as not acceptable for clinical research
- 1,182 with gender not equal to Male or Female
- 3 with year of birth before 1875
- 3,801,458 with practice up-to-standard after the patient died or left the practice
- 4 with first registration date after the last collection date
- 257,093 with no observations
Our Oxford OMOP CDM data include the remaining 17,526,900 patients and the numbers below refer to this OMOP CDM population.
Population

Population size

17526900

Active population size

2730170

Population by age group

Age groupPopulation sizeActive population size
Paediatric Population (< 18 years)
3156457
499808
Children (2 to < 12 years)
1855462
270946
Adolescents (12 to < 18 years)
962713
188977
Adults (18 to < 46 years)
7523905
1009545
Adults (46 to < 65 years)
3375756
681541
Elderly (≥ 65 years)
3470782
539276
Adults (65 to < 75 years)
1375331
282623
Adults (75 to < 85 years)
1183920
188530
Adults (85 years and over)
911531
68123
Median observation time

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

5.89

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

13.35