Table 1

C16 and C20 cohort demographics till the end of May 2020

CohortC16C20
Individuals (N)3 087 0323 277 114
Cohort start date1 January 20161 January 2020
Cohort end date31 December 201931 May 2020
Deaths in period117 565 (3.8%)16 380 (0.5%)
Full coverage (cohort end date=31 December 2019/31 May 2020)2 651 957 (85.9%)3 237 389 (98.8%)
Registered with a SAIL providing practice (registration end date >cohort start date)2 608 761 (84.5%)2 666 331 (81.4%)
Mean age (SD)41.3 (23.7)41.9 (23.8)
Sex
 Female50.1%50.1%
WIMD 2019 quintile*
 120.3%19.1%
 219.9%18.5%
 320.1%18.4%
 419.7%18.1%
 519.9%18.3%
Missing WIMD0.0%7.7%
  • *WIMD 2019 quintile: 1=most deprived, 5=least deprived, please note a one decimal place rounding error.

  • SAIL, Secure Anonymised Information Linkage; WIMD, Welsh Index of Multiple Deprivation.