Study registration: *
Publication Sheikh A, Lancet, 2021
Dates: 2021-04-01 to 2021-06-06
Funding: Public/non profit (EAVE II is funded by the Medical Research Council (MR/R008345/1) with the support of BREATHE - The Health Data Research Hub for Respiratory Health [MC_PC_19004], which is funded through the UK Research and Innovation Industrial Strategy Challenge Fund and delivered through Health Data Research UK. Additional support has been provided through Public Health Scotland and Scottish Government DG Health and Social Care and the Data and Connectivity National Core Study, led by Health Data Research UK in partnership with the Office for National Statistics and funded by UK Research and Innovation)
Conflict of interest: NR ()

Methods

Study design:Test-negative
Description of participants: People of all ages tested for COVID-19 by RT-PCR in Scotland
Inclusion criteria:
  • All individuals who had a PCR test for SARS-CoV-2 in the study period (April 1 to June 6, 2021) in Scotland, UK.

Exclusion criteria:
  • Individuals tested during a hospital stay from day 3 onwards(Hospital-acquired COVID-19)

Follow-up duration (months): 2
Vaccines:
  • 1 or 2 doses of BNT162b2
  • 1 or 2 doses of ChAdOx1-S
Variant description :
Variant name: Delta
Evidence: Direct evidence (effectiveness determined by sequencing cases)
Documents
available

Protocol

NR

Statistical plan

NR

Data-sharing stated: NR
Data accessibility: NR
General comment Concerns mainly over uncontrolled confounding; in addition there are uncertainties over the possibility of selection bias in a test-negative design.