Evaluating the Test-Retest Reliability and Measurement Error of a Sit-Stand-Power Test in Individuals Treated for...

Area of Science:

• Exercise oncology
• Musculoskeletal function assessment
• Cancer rehabilitation

Background:

• Muscular strength and physical function are key in exercise oncology, but muscular power is often overlooked.
• Muscular power significantly impacts morbidity and mortality.
• The sit-to-stand power (STSp) test is a practical method for evaluating lower-body power.

Purpose of the Study:

• To evaluate the test-retest reliability of the STSp test in cancer survivors.
• To determine the measurement error and minimal detectable change (MDC) of the STSp test.
• To assess the feasibility of the STSp test in oncological settings.

Main Methods:

• 103 adults treated for cancer completed the STSp test twice within 2-10 days.
• Test-retest reliability was assessed using intraclass correlation coefficients (ICC(3,1)).
• Standard error of measurement (SEM) and MDC were calculated.

Main Results:

• The STSp test demonstrated good reliability for both peak power (ICC=0.86) and average power (ICC=0.86).
• Peak power SEM was 199.9 W and MDC was 554.10 W.
• Average power SEM was 179.05 W and MDC was 496.30 W.

Conclusions:

• The STSp test is a reliable tool for assessing lower-body muscular power in cancer survivors.
• Its low cost and feasibility make it suitable for monitoring power in oncology.
• Substantial within-subject variability necessitates further protocol standardization.