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A Study of the Reliability, Validity, and Physiological Changes of Sit-to-Stand Tests in People With Heart Failure
Julie A Adsett1, Rachel Bowe, Rebecca Kelly
1Physiotherapy Department, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia (Dr Adsett); Physiotherapy Department, Cairns Base Hospital, Cairns, Queensland Australia (Ms Bowe); Physiotherapy Department, The Prince Charles Hospital, Brisbane, Queensland, Australia (Ms Kelly and Dr Morris); Chronic Disease and Post-acute Programmes, Robina Health Precinct, Gold Coast, Queensland, Australia (Ms Louis); School of Health Sciences and Social Work, Griffith University, Gold Coast, Queensland, Australia (Ms Louis and Dr Morris); Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia (Dr Morris); and Physiotherapy Department, Princess Alexandra Hospital, Brisbane, Queensland, Australia (Dr Hwang).
Purpose:
The objective of this study was to describe the psychometric properties and physiological response of the five times sit-to-stand (STST-5) and 60-sec sit-to-stand test (STST-60) in adults with heart failure (HF).
Methods:
People with HF enrolled in a 12-wk exercise rehabilitation program completed two STST-5 and two STST-60 as part of their usual baseline and follow-up assessments. Test-retest reliability, validity, and responsiveness of the two STSTs were described. Results were correlated with the 6-min walk test (6MWT) and timed up and go test (TUGT), and rating of perceived exertion and physiological responses were compared between all tests. Feasibility was also reported according to the presence of adverse events and adherence to the protocol.
Results:
Forty-nine adults with HF participated in this study. Intraclass correlation coefficients of the STST-5 and STST-60 were 0.91 (95% CI, 0.78-0.96) and 0.96 (95% CI, 0.93-0.98), respectively. The STST-60 was strongly associated with both the 6MWT ( r = 0.76) and the TUGT ( rs =-0.77). The STST-5 was strongly associated with the TUGT ( rs = 0.79) and moderately associated with the 6MWT ( rs =-0.70). Rating of perceived exertion and lower limb fatigue were greater in the STST-60 than in the 6MWT ( P < .001) or STST-5 ( P < .001). Adverse events occurred in five participants undertaking the STST-60 and one participant undertaking the STST-5.
Conclusions:
The STST-5 and STST-60 are reliable and valid measures of functional exercise capacity in people with HF.
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