Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine · 2026
Test-retest reliability and the minimal detectable change of clinical and structural outcomes in athletes with patellar tendinopathy.
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Hjortshoej Mikkel Holm, Gillani Syed Zahra, Svensson René Brüggebusch, Magnusson S Peter, Agergaard Anne-Sofie
Аннотация
OBJECTIVES: To establish test-retest reliability and minimal detectable change (MDC) values for outcomes in patients with patellar tendinopathy.
DESIGN: Test-retest reliability study.
SETTING: Hospital.
PARTICIPANTS: Thirty participants (29.6 years, 77% males) underwent two test days with a 7-day hiatus.
MAIN OUTCOME MEASURES: Single-leg decline squat (SLDS), VISA-P, pain pressure threshold (PPT), and ultrasound measurements (tendon thickness and Power Doppler (PD) activity). Data was analyzed using intraclass correlation coefficient (ICC) and MDC performed on standard deviation (SD) of pooled and change scores.
RESULTS: The SLDS showed ICC values ranging from 0.86 to 0.92 with a MDC95 ranging from 0.91 to 2.46 on the numeric rating scale for SDchange and SDpooled. For the VISA-P, the ICC was 0.93 with a MDC95 of 6.05 and 11.81 for SDchange and SDpooled. PPT resulted in an ICC of 0.91 and MDC95 of 69.37 and 117.06 kPa for SDchange and SDpooled. Tendon thickness showed an ICC of 0.98 and MDC95 of 0.29 and 1.01 mm for SDchange and SDpooled. PD activity showed an ICC of 0.80, and MDC95 of 11.95 and 18.78 mm2 for SDchange and SDpooled.
CONCLUSIONS: The SLDS, VISA-P, PPT, tendon thickness, and PD activity demonstrated good-to-excellent relative reliability in individuals with PT; however, absolute measurement precision was limited.
DESIGN: Test-retest reliability study.
SETTING: Hospital.
PARTICIPANTS: Thirty participants (29.6 years, 77% males) underwent two test days with a 7-day hiatus.
MAIN OUTCOME MEASURES: Single-leg decline squat (SLDS), VISA-P, pain pressure threshold (PPT), and ultrasound measurements (tendon thickness and Power Doppler (PD) activity). Data was analyzed using intraclass correlation coefficient (ICC) and MDC performed on standard deviation (SD) of pooled and change scores.
RESULTS: The SLDS showed ICC values ranging from 0.86 to 0.92 with a MDC95 ranging from 0.91 to 2.46 on the numeric rating scale for SDchange and SDpooled. For the VISA-P, the ICC was 0.93 with a MDC95 of 6.05 and 11.81 for SDchange and SDpooled. PPT resulted in an ICC of 0.91 and MDC95 of 69.37 and 117.06 kPa for SDchange and SDpooled. Tendon thickness showed an ICC of 0.98 and MDC95 of 0.29 and 1.01 mm for SDchange and SDpooled. PD activity showed an ICC of 0.80, and MDC95 of 11.95 and 18.78 mm2 for SDchange and SDpooled.
CONCLUSIONS: The SLDS, VISA-P, PPT, tendon thickness, and PD activity demonstrated good-to-excellent relative reliability in individuals with PT; however, absolute measurement precision was limited.