Long COVIDNCT05886842
Reliability (Test-retest) of 30 Seconds Sit-to-stand and Timed Up and Go in Adults With Long Covid
An observational study of Long COVID, run by European University Cyprus at 1 site in Cyprus.
Trial summary
The goal of this study is to test the reliability (with a test-retest process) of 30 seconds Sit to Stand and Timed Up and Go in an adult population with long-covid, hospitalised in a rehabilitation center. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Long COVID
- What is being tested?
- Test-retest
- How many people
- 19 participants
- Where
- 1 siteCyprus
- Study dates
- 21 Dec 2022to 21 Dec 2024
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adults with a diagnosis of long-covid hospitalised in a rehabilitation center
Who may be able to join
- Adults who were infected with COVID-19 virus in the last 6 months and were diagnosed with long-covid
- Patients must be willing to give written consent for participation in the study
- Negative rapid test for COVID-19
Who cannot join
- People under 18 years of age
- Significant cognitive and psychiatric impairments (inability to follow simple commands or give consent)
- Refuse to give consent
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Reliability of 30 Seconds Sit-to-stand and Timed Up and Go in Adults With Long Covid
The goal of this study is to test the reliability (with a test-retest process) of 30 seconds Sit to Stand and Timed Up and Go in an adult population with long-covid, hospitalised in a rehabilitation center.
Read the detailed description
Since December 2019, Covid-19 has affected millions of people worldwide, leaving many of them with symptoms such as fatigue, (muscle) weakness and dyspnoea, even months after their infection (long covid). Rehabilitation centers were established to aid this new group of patients. This study's aim is to test the reliability of 2 outcome measures for patients with long covid. 30 seconds Sit-To-Stand and Timed Up And Go tests are not specific to a disease but they evaluate functionality, mobility and endurance. They are easy to perform in a clinical setting as they do not require specific equipment. The reliability of the above tests has yet to be established in people with long covid.
A sample size of 19 people will be used. A difference in reliability of 0.9 and 0.7 at 80% power and a 5% level of significance using two ratings was set. Based on two testing sessions, an x value of 0.05, and a power of 0.80, a minimal sample size of 19 patients was identified (Karagiannis et al., 2020).
19 patients with long covid from the rehabilitation center will take both tests in a single day and 3 days later they will take the tests again with no physical therapy intervention in between the measurements.
For the statistical analysis, ICC (Intra-class correlation coefficients), SEM (standard error of measurement) and Bland-Altman plot will be used. These tests evaluate test-retest reliability, through the identification of the agreement of patient's scores between the 2 measurements and they evaluate the measurement precision (Savva et al, 2014).
- Conditions
- Long COVID
- Being tested
- Test-retest
- Keywords
- Test-retest, Reliability, 30 seconds Sit to Stand, Timed up and Go
- Medical subject headings
- Post-Acute COVID-19 Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Test-retestOther
Also called Reliability
Test-retest
| Study group | Role | What they receive |
|---|---|---|
| Test-retest | A group of 19 patients will be tested using the 30 seconds Sit-to-stand and Timed up and go tests. Each test will be repeated 3 times and the best score will be used. There is going to be 3 days waiting period before the re-tests. Receives: Other: Test-retest |
What is being measured
The primary outcome is the main question the study is designed to answer.
Reliability of 30 seconds Sit to stand
Test-retest that assess the reliability of 30 seconds Sit to Stand
Measured: Two occasions within approximately three days to establish intra rater reliability
Reliability of Timed Up and Go
Test-retest that assess the reliability of Timed Up and Go
Measured: Two occasions within approximately three days to establish intra rater reliability
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jun 2023
- Study start21 Dec 2022
- Primary completion21 Dec 2024
- Study completion21 Dec 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Long COVIDStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 19 participants (actual)
Sponsor and investigators
- Lead sponsor
- European University Cyprus
- Sponsor type
- University, hospital or other
- Collaborators
- Eden Resort Wellness Rehabilitation Center
- Responsible party
- Principal investigator, Marina Kloni, European University Cyprus
- Investigators
- Marina E Kloni, Principal investigator, European University Cyprus
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05886842
- Sponsor's protocol ID
- Test-Retest
- Status last verified
- Mar 2025
- First submitted
- 12 Apr 2023
- Last updated
- 14 Aug 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Figueiredo PHS, Veloso LRS, Lima MMO, Vieira CFD, Alves FL, Lacerda ACR, Lima VP, Rodrigues VGB, Maciel EHB, Costa HS. The reliability and validity of the 30-seconds sit-to-stand test and its capacity for assessment of the functional status of hemodialysis patients. J Bodyw Mov Ther. 2021 Jul;27:157-164. doi: 10.1016/j.jbmt.2021.02.020. Epub 2021 Mar 4.
PubMed 34391227Hansen H, Beyer N, Frolich A, Godtfredsen N, Bieler T. Intra- and inter-rater reproducibility of the 6-minute walk test and the 30-second sit-to-stand test in patients with severe and very severe COPD. Int J Chron Obstruct Pulmon Dis. 2018 Oct 18;13:3447-3457. doi: 10.2147/COPD.S174248. eCollection 2018.
PubMed 30425474Ozcan Kahraman B, Ozsoy I, Akdeniz B, Ozpelit E, Sevinc C, Acar S, Savci S. Test-retest reliability and validity of the timed up and go test and 30-second sit to stand test in patients with pulmonary hypertension. Int J Cardiol. 2020 Apr 1;304:159-163. doi: 10.1016/j.ijcard.2020.01.028. Epub 2020 Jan 15.
PubMed 31980271Steffen TM, Hacker TA, Mollinger L. Age- and gender-related test performance in community-dwelling elderly people: Six-Minute Walk Test, Berg Balance Scale, Timed Up & Go Test, and gait speeds. Phys Ther. 2002 Feb;82(2):128-37. doi: 10.1093/ptj/82.2.128.
PubMed 11856064Donner A, Eliasziw M. Sample size requirements for reliability studies. Stat Med. 1987 Jun;6(4):441-8. doi: 10.1002/sim.4780060404.
PubMed 3629046Walter SD, Eliasziw M, Donner A. Sample size and optimal designs for reliability studies. Stat Med. 1998 Jan 15;17(1):101-10. doi: 10.1002/(sici)1097-0258(19980115)17:13.0.co;2-e.
PubMed 9463853Karagiannis C, Savva C, Korakakis V, Matheou I, Adamide T, Georgiou A, Xanthos T. Test-Retest Reliability of Handgrip Strength in Patients with Chronic Obstructive Pulmonary Disease. COPD. 2020 Oct;17(5):568-574. doi: 10.1080/15412555.2020.1808604. Epub 2020 Aug 19.
PubMed 32814452Savva C, Giakas G, Efstathiou M, Karagiannis C. Test-retest reliability of handgrip strength measurement using a hydraulic hand dynamometer in patients with cervical radiculopathy. J Manipulative Physiol Ther. 2014 Mar-Apr;37(3):206-10. doi: 10.1016/j.jmpt.2014.02.001. Epub 2014 Mar 11.
PubMed 24630769Shechtman O, Gestewitz L, Kimble C. Reliability and validity of the DynEx dynamometer. J Hand Ther. 2005 Jul-Sep;18(3):339-47. doi: 10.1197/j.jht.2005.04.002.
PubMed 16059855Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986 Feb 8;1(8476):307-10.
PubMed 2868172Myles PS, Cui J. Using the Bland-Altman method to measure agreement with repeated measures. Br J Anaesth. 2007 Sep;99(3):309-11. doi: 10.1093/bja/aem214. No abstract available.
PubMed 17702826Shrout PE. Measurement reliability and agreement in psychiatry. Stat Methods Med Res. 1998 Sep;7(3):301-17. doi: 10.1177/096228029800700306.
PubMed 9803527
Study at a glance
From the registry record, last updated by the sponsor on 14 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Reliability of 30 Seconds Sit-to-stand and Timed Up and Go in Adults With Long Covid
- ClinicalTrials.gov ID
- NCT05886842
- Acronym / sponsor ID
- Test-Retest
- Conditions
- Long COVID
- Keywords
- Test-retest, Reliability, 30 seconds Sit to Stand, Timed up and Go
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 19 participants (actual)
- Lead sponsor
- European University CyprusUniversity, hospital or other
- Collaborators
- Eden Resort Wellness Rehabilitation Center
- Study start
- 21 Dec 2022 (actual)
- Primary completion
- 21 Dec 2024 (actual)
- Study completion
- 21 Dec 2024 (actual)
- First posted
- 2 Jun 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this study is to test the reliability (with a test-retest process) of 30 seconds Sit to Stand and Timed Up and Go in an adult population with long-covid, hospitalised in a rehabilitation center.
Detailed description
Since December 2019, Covid-19 has affected millions of people worldwide, leaving many of them with symptoms such as fatigue, (muscle) weakness and dyspnoea, even months after their infection (long covid). Rehabilitation centers were established to aid this new group of patients. This study's aim is to test the reliability of 2 outcome measures for patients with long covid. 30 seconds Sit-To-Stand and Timed Up And Go tests are not specific to a disease but they evaluate functionality, mobility and endurance. They are easy to perform in a clinical setting as they do not require specific equipment. The reliability of the above tests has yet to be established in people with long covid.
A sample size of 19 people will be used. A difference in reliability of 0.9 and 0.7 at 80% power and a 5% level of significance using two ratings was set. Based on two testing sessions, an x value of 0.05, and a power of 0.80, a minimal sample size of 19 patients was identified (Karagiannis et al., 2020).
19 patients with long covid from the rehabilitation center will take both tests in a single day and 3 days later they will take the tests again with no physical therapy intervention in between the measurements.
For the statistical analysis, ICC (Intra-class correlation coefficients), SEM (standard error of measurement) and Bland-Altman plot will be used. These tests evaluate test-retest reliability, through the identification of the agreement of patient's scores between the 2 measurements and they evaluate the measurement precision (Savva et al, 2014).
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Test-retest | – | Other: Test-retestA group of 19 patients will be tested using the 30 seconds Sit-to-stand and Timed up and go tests. Each test will be repeated 3 times and the best score will be used. There is going to be 3 days waiting period before the re-tests. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adults with a diagnosis of long-covid hospitalised in a rehabilitation center
Key inclusion criteria (3 listed)
- Adults who were infected with COVID-19 virus in the last 6 months and were diagnosed with long-covid
- Patients must be willing to give written consent for participation in the study
- Negative rapid test for COVID-19
Key exclusion criteria (3 listed)
- People under 18 years of age
- Significant cognitive and psychiatric impairments (inability to follow simple commands or give consent)
- Refuse to give consent
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Test-retestAlso: ReliabilityTest-retest | Other | Test-retest |
Primary outcome
Reliability of 30 seconds Sit to stand
Time frame: Two occasions within approximately three days to establish intra rater reliability
Test-retest that assess the reliability of 30 seconds Sit to Stand
Reliability of Timed Up and Go
Time frame: Two occasions within approximately three days to establish intra rater reliability
Test-retest that assess the reliability of Timed Up and Go
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Aug 2025.
- Background: PubMed 34391227Figueiredo PHS, Veloso LRS, Lima MMO, Vieira CFD, Alves FL, Lacerda ACR, Lima VP, Rodrigues VGB, Maciel EHB, Costa HS. The reliability and validity of the 30-seconds sit-to-stand test and its capacity for assessment of the functional status of hemodialysis patients. J Bodyw Mov Ther. 2021 Jul;27:157-164. doi: 10.1016/j.jbmt.2021.02.020. Epub 2021 Mar 4.
- Background: PubMed 30425474Hansen H, Beyer N, Frolich A, Godtfredsen N, Bieler T. Intra- and inter-rater reproducibility of the 6-minute walk test and the 30-second sit-to-stand test in patients with severe and very severe COPD. Int J Chron Obstruct Pulmon Dis. 2018 Oct 18;13:3447-3457. doi: 10.2147/COPD.S174248. eCollection 2018.
- Background: PubMed 31980271Ozcan Kahraman B, Ozsoy I, Akdeniz B, Ozpelit E, Sevinc C, Acar S, Savci S. Test-retest reliability and validity of the timed up and go test and 30-second sit to stand test in patients with pulmonary hypertension. Int J Cardiol. 2020 Apr 1;304:159-163. doi: 10.1016/j.ijcard.2020.01.028. Epub 2020 Jan 15.
- Background: PubMed 11856064Steffen TM, Hacker TA, Mollinger L. Age- and gender-related test performance in community-dwelling elderly people: Six-Minute Walk Test, Berg Balance Scale, Timed Up & Go Test, and gait speeds. Phys Ther. 2002 Feb;82(2):128-37. doi: 10.1093/ptj/82.2.128.
- Background: PubMed 3629046Donner A, Eliasziw M. Sample size requirements for reliability studies. Stat Med. 1987 Jun;6(4):441-8. doi: 10.1002/sim.4780060404.
- Background: PubMed 9463853Walter SD, Eliasziw M, Donner A. Sample size and optimal designs for reliability studies. Stat Med. 1998 Jan 15;17(1):101-10. doi: 10.1002/(sici)1097-0258(19980115)17:13.0.co;2-e.
- Background: PubMed 32814452Karagiannis C, Savva C, Korakakis V, Matheou I, Adamide T, Georgiou A, Xanthos T. Test-Retest Reliability of Handgrip Strength in Patients with Chronic Obstructive Pulmonary Disease. COPD. 2020 Oct;17(5):568-574. doi: 10.1080/15412555.2020.1808604. Epub 2020 Aug 19.
- Background: PubMed 24630769Savva C, Giakas G, Efstathiou M, Karagiannis C. Test-retest reliability of handgrip strength measurement using a hydraulic hand dynamometer in patients with cervical radiculopathy. J Manipulative Physiol Ther. 2014 Mar-Apr;37(3):206-10. doi: 10.1016/j.jmpt.2014.02.001. Epub 2014 Mar 11.
- Background: PubMed 16059855Shechtman O, Gestewitz L, Kimble C. Reliability and validity of the DynEx dynamometer. J Hand Ther. 2005 Jul-Sep;18(3):339-47. doi: 10.1197/j.jht.2005.04.002.
- Background: PubMed 2868172Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986 Feb 8;1(8476):307-10.
- Background: PubMed 17702826Myles PS, Cui J. Using the Bland-Altman method to measure agreement with repeated measures. Br J Anaesth. 2007 Sep;99(3):309-11. doi: 10.1093/bja/aem214. No abstract available.
- Background: PubMed 9803527Shrout PE. Measurement reliability and agreement in psychiatry. Stat Methods Med Res. 1998 Sep;7(3):301-17. doi: 10.1177/096228029800700306.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Marina E Kloni principal investigator
European University Cyprus
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Long COVID, run by European University Cyprus at 1 site in Cyprus.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 14 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Cyprus. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Reliability of 30 seconds Sit to stand (time frame: Two occasions within approximately three days to establish intra rater reliability). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05886842, which also lists 12 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Aug 2025.