ArticleBMJ open2023
Prognosis of patients with long COVID symptoms: a protocol for a longitudinal cohort study at a primary care referred outpatient clinic in Helsinki, Finland.
Article in BMJ open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05699512 (What is the Prognosis of Functional Ability, Symptoms and Quality of Life in Patients That Are Treated in a University Hospital Because Symptoms of Post Covid-19 Condition), which is not on this map. Cited by 5 papers.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
What is the Prognosis of Functional Ability, Symptoms and Quality of Life in Patients That Are Treated in a University Hospital Because Symptoms of Post Covid-19 Condition
Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- Facilitators and barriers for return to work among patients with post-COVID-19 condition: a qualitative interview study.Scandinavian journal of primary health care · 2026Article
- Anticoagulation therapy in children with SARS-CoV-2 pneumonia: a retrospective observational study on dosage, efficacy, and safety.BMC pediatrics · 2026Observational
- Functioning of post-COVID-19 patients: a cross-sectional study at the outpatient clinic for long-term effects.Scandinavian journal of primary health care · 2025Article
- Patients with post-COVID-19 condition show minor blood transcriptomic changes, with altered erythrocyte gene expression in a male subgroup.Frontiers in immunology · 2025Article
- Association between COVID-19 vaccination, SARS-CoV-2 variants, and post COVID-19 condition: A cross-sectional study.PloS one · 2025Article
Corrections and comments
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Authors and funding
13 authors at 6 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionAfter COVID-19, many continue to experience persistent debilitating symptoms, that is, long COVID. Its most prevalent symptoms are chest pain, difficulties with breathing, painful muscles, ageusia or anosmia, tingling extremities and general tiredness. This paper describes the protocol of the Long COVID Cohort Study to assess the prognosis and prognostic determinants of patients with long COVID by implementing patient-reported outcome measures (PROMs), patient-reported experience measures (PREMs) and clinical examinations during a 1-year follow-up. METHODS AND ANALYSIS: This is a prospective, single-site cohort study consisting of administering questionnaires and clinical examinations to adult patients referred to the Clinic for Long-Term Effects of COVID-19 at Helsinki University Hospital (Hospital district of Helsinki and Uusimaa). The referrals are from all healthcare units within HUS and other hospital districts during years 2021-2023. All admitted patients have had laboratory-confirmed COVID-19. The targeted study sample size is 500 participants. The questionnaires are administered at 0, 3, 6 and 12 months. The main outcome variables are the changes in self-reported functional abilities and quality of life. In addition, we will evaluate functional abilities at baseline using neurocognitive evaluation, a 6MWT and a measurement of hand grip strength. The Long COVID Cohort Study will form a quality register for the clinic and characterise the first systematic collection of PROMs, PREMs, questionnaire and clinical examinations related to long COVID in Finland. The Study belongs to a study consortium Long COVID-HORIZON-HLTH-2021-DISEASE-04 that aims to reveal the biomechanisms of long COVID. ETHICS AND DISSEMINATION: This study has been approved by the Helsinki University Hospital research ethics committee board, ID HUS/1493/2021 on 6 March 2021. All study participants sign written informed consent for participation. The study findings will be reported for publication in peer-reviewed journals. TRIAL REGISTRATION NUMBER: NCT05699512; Pre-results.
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