Restricted accessResearch articleFirst published online 2026
Validation and reliability of the Turkish version of the Lymphedema Symptom Intensity and Distress Survey–Lower Limb (LSIDS-L) in patients with lower extremity lymphedema
Effective management of lower extremity lymphedema requires its recognition as a distinct clinical entity. This study aimed to evaluate the validity and reliability of the Turkish version of the Lymphedema Symptom Intensity and Distress Survey–Lower Limb (LSIDS-L), a tool designed to assess both the severity and distress of symptoms in patients with lower limb lymphedema.
Aims
To evaluate the validity and reliability of the Turkish version of the Lymphedema Symptom Intensity and Distress Survey–Lower Limb (LSIDS-L) in patients with lower extremity lymphedema.
Study design
Diagnostic Accuracy Study.
Methods
The LSIDS-L was translated and culturally adapted into Turkish using the forward-backward translation method. The final version was administered to 155 patients alongside the Lymphoedema Quality of Life Questionnaire–Leg (LYMQOL-Leg). Reliability was assessed using a 7-days test-retest approach. Descriptive statistics were used for demographic data. Construct validity was evaluated using Spearman’s rank correlation coefficient, while internal consistency and test-retest reliability were assessed via Cronbach’s alpha and the intraclass correlation coefficient (ICC), respectively.
Results
The questionnaire demonstrated excellent test-retest reliability with ICC1k = 0.9989 and r = 0.9970. Internal consistency was also high, with a Cronbach’s alpha of 0.9180 and a standardized alpha of 0.9145, indicating strong coherence among items.
Conclusion
The Turkish version of the LSIDS-L (LSIDS-L-TR) is a valid and reliable instrument for assessing symptom intensity and distress in patients with lower extremity lymphedema. It offers a comprehensive tool for use in both clinical practice and research settings.
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