tetano
Editor, Senior Moderator
BMJ Open
. 2024 May 6;14(5):e087799.
doi: 10.1136/bmjopen-2024-087799. Cohort profile: EFTER-COVID - a Danish nationwide cohort for assessing the long-term health effects of the COVID-19 pandemic
Anna Irene Vedel Sørensen[SUP] 1 [/SUP], Peter Bager[SUP] 2 [/SUP], Nete Munk Nielsen[SUP] 2 3 [/SUP], Anders Koch[SUP] 4 5 [/SUP], Lampros Spiliopoulos[SUP] 2 [/SUP], Anders Hviid[SUP] 2 6 [/SUP], Steen Ethelberg[SUP] 4 7 [/SUP]
Affiliations
Purpose: To follow SARS-CoV-2-infected persons up to 18 months after a positive test in order to assess the burden and nature of post acute symptoms and health problems.
Participants: Persons in Denmark above 15 years of age, who were tested positive for SARS-CoV-2 during 1 September 2020 to 21 February 2023 using a RT-PCR test. As a reference group, three test-negative individuals were selected for every two test-positive individuals by matching on test date.
Findings to date: In total, 2 427 913 invitations to baseline questionnaires have been sent out and 839 528 baseline questionnaires (34.5%) have been completed. Females, the age group 50-69 years, Danish-born and persons, who had received at least one SARS-CoV-2 vaccination booster dose were more likely to participate. Follow-up questionnaires were sent at 2, 4, 6, 9, 12 and 18 months after the test, with response rates at 42%-54%.
Future plans: New participants have been recruited on a daily basis from 1 August 2021 to 23 March 2023. Data collection will continue until the last follow-up questionnaires (at 18 months after test) have been distributed in August 2024.
Keywords: COVID-19; EPIDEMIOLOGY; Epidemiology.
. 2024 May 6;14(5):e087799.
doi: 10.1136/bmjopen-2024-087799. Cohort profile: EFTER-COVID - a Danish nationwide cohort for assessing the long-term health effects of the COVID-19 pandemic
Anna Irene Vedel Sørensen[SUP] 1 [/SUP], Peter Bager[SUP] 2 [/SUP], Nete Munk Nielsen[SUP] 2 3 [/SUP], Anders Koch[SUP] 4 5 [/SUP], Lampros Spiliopoulos[SUP] 2 [/SUP], Anders Hviid[SUP] 2 6 [/SUP], Steen Ethelberg[SUP] 4 7 [/SUP]
Affiliations
- PMID: 38719312
- DOI: 10.1136/bmjopen-2024-087799
Purpose: To follow SARS-CoV-2-infected persons up to 18 months after a positive test in order to assess the burden and nature of post acute symptoms and health problems.
Participants: Persons in Denmark above 15 years of age, who were tested positive for SARS-CoV-2 during 1 September 2020 to 21 February 2023 using a RT-PCR test. As a reference group, three test-negative individuals were selected for every two test-positive individuals by matching on test date.
Findings to date: In total, 2 427 913 invitations to baseline questionnaires have been sent out and 839 528 baseline questionnaires (34.5%) have been completed. Females, the age group 50-69 years, Danish-born and persons, who had received at least one SARS-CoV-2 vaccination booster dose were more likely to participate. Follow-up questionnaires were sent at 2, 4, 6, 9, 12 and 18 months after the test, with response rates at 42%-54%.
Future plans: New participants have been recruited on a daily basis from 1 August 2021 to 23 March 2023. Data collection will continue until the last follow-up questionnaires (at 18 months after test) have been distributed in August 2024.
Keywords: COVID-19; EPIDEMIOLOGY; Epidemiology.