Irish journal of medical science · 2026
Reliability and validity of the supine-to-stand test in patients with Parkinson's disease.
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Maden Tuba, Polat Hakan, Demi̇r Fatih
Аннотация
BACKGROUND: The Supine-to-Stand Test (SST) evaluates trunk control, muscle strength, balance, and movement coordination.
AIMS: This study investigated the reliability and validity of the SST in patients with Parkinson’s disease (pwPD).
METHODS: Forty-one pwPD participated in this cross-sectional study. Ankle plantar and dorsiflexor strength was measured with a digital dynamometer. Manual dexterity, balance, and functional mobility were assessed using the 9-Hole Peg Test (9HPT), Berg Balance Scale (BBS), and Timed Up and Go Test (TUG). To examine the convergent validity of the Supine-to-Stand Test (SST). Receiver operating characteristic (ROC) curve analysis was performed, and the optimal cut-off value was determined based on the best combination of sensitivity and specificity. Fear of falling was evaluated with the Activity-specific Balance Confidence (ABC) scale. Motor severity was assessed via the Unified Parkinson’s Disease Rating Scale Part III (UPDRS-III), and quality of life with the Parkinson’s Disease Quality of Life Scale (PDQ-39). Test-retest reliability was determined using the intraclass correlation coefficient (ICC).
RESULTS: SST test-retest reliability was excellent (ICC = 0.976, 95% CI: 0.955–0.976, p < 0.001). Ankle dorsiflexor strength was moderately positively correlated with SST time bilaterally (dominant r = 0.381, p = 0.014; non-dominant r = 0.341, p = 0.029). Age, disease duration, plantar strength, hand functions, rigidity, and quality of life showed no significant relation with SST (p > 0.05). A moderate negative correlation existed between BBS and SST (r=-0.341, p = 0.029), while TUG and SST (r = 0.351, p = 0.024) and ABC and SST (r = 0.384, p = 0.013) were moderately positively associated.
CONCLUSION: SST is a reliable and valid tool for assessing functional performance in pwPD.
AIMS: This study investigated the reliability and validity of the SST in patients with Parkinson’s disease (pwPD).
METHODS: Forty-one pwPD participated in this cross-sectional study. Ankle plantar and dorsiflexor strength was measured with a digital dynamometer. Manual dexterity, balance, and functional mobility were assessed using the 9-Hole Peg Test (9HPT), Berg Balance Scale (BBS), and Timed Up and Go Test (TUG). To examine the convergent validity of the Supine-to-Stand Test (SST). Receiver operating characteristic (ROC) curve analysis was performed, and the optimal cut-off value was determined based on the best combination of sensitivity and specificity. Fear of falling was evaluated with the Activity-specific Balance Confidence (ABC) scale. Motor severity was assessed via the Unified Parkinson’s Disease Rating Scale Part III (UPDRS-III), and quality of life with the Parkinson’s Disease Quality of Life Scale (PDQ-39). Test-retest reliability was determined using the intraclass correlation coefficient (ICC).
RESULTS: SST test-retest reliability was excellent (ICC = 0.976, 95% CI: 0.955–0.976, p < 0.001). Ankle dorsiflexor strength was moderately positively correlated with SST time bilaterally (dominant r = 0.381, p = 0.014; non-dominant r = 0.341, p = 0.029). Age, disease duration, plantar strength, hand functions, rigidity, and quality of life showed no significant relation with SST (p > 0.05). A moderate negative correlation existed between BBS and SST (r=-0.341, p = 0.029), while TUG and SST (r = 0.351, p = 0.024) and ABC and SST (r = 0.384, p = 0.013) were moderately positively associated.
CONCLUSION: SST is a reliable and valid tool for assessing functional performance in pwPD.