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Validity, reliability and minimal detectable change in the sit-to-stand test for synchronous and asynchronous
Juliane Machado Marques1, Matheus Brasiliano da Paz1, Rodrigo Rodrigues Gomes Costa2
1Neurological Rehabilitation, SARAH Network of Rehabilitation Hospitals, Brasília, DF, Brazil.
Background:
Individuals with symptoms of long-term COVID-19 (coronavirus disease 2019) who presented mild infection without needing invasive ventilatory support require rehabilitation and performance and monitoring evaluations. The 1-minute sit-to-stand test (STS) is used to assess individuals with COVID-19 and might be an alternative for remote use in this population.
Objective:
The current study aimed to validate the synchronous and asynchronous STS tele-assessment in individuals with post-COVID-19 condition to analyze the inter-evaluator reliability of the asynchronous STS, and identify the relationship between the participants' self-reported asynchronous STS results and those of the evaluator.
Methods:
Thirty-eight men and women with post-COVID syndrome who did not require invasive ventilator support were included in this study. The participants were assessed using STS in-person (STS-IP), synchronous (STS-S), and asynchronous (STS-A) tele-assessments. The participants also self-reported the total executed repetitions (STS-SR). The main outcomes were the number of repetitions performed in the STS-IP, STS-S, STS-A, and STS-SR. To verify STS-A reliability, the total repetitions registered between evaluators were compared.
Results:
STS-IP showed significant correlations and lower total repetitions compared to STS-S and STS-A. STS-A repetitions were significantly lower compared to STS-SR; however, a significant correlation was observed. The STS-S and STS-A showed minimal detectable change values of 6.6 and 10.5, respectively. In terms of reliability, there were no significant differences in total repetitions or errors found between evaluators' assessments of STS-A.
Conclusion:
The study demonstrated good and moderate evidence of validity for synchronous and asynchronous remote STS assessments, respectively, highlighting the impact of the assessment protocol on STS performance interpretation. Asynchronous STS presented high reliability.
