Validity and Reliability of the Turkish Duke Activity Status Index in Women With Lipedema

Validity and Reliability Study of the Turkish Version of the Duke Activity Status Index in Patients With Lipedema

This study aims to evaluate the validity and reliability of the Turkish version of the Duke Activity Status Index (DASI) in women with lipedema. DASI is a 12-item questionnaire designed to assess functional capacity based on activities of daily living. The study will examine the test-retest reliability and internal consistency of the Turkish DASI and investigate its validity by examining its relationships with functional exercise capacity, lower extremity function, and health-related quality of life. The findings are expected to determine whether the Turkish DASI is a valid and reliable tool for assessing functional capacity in women with lipedema.

Lipedema is a chronic disorder characterized by disproportionate and symmetrical accumulation of subcutaneous adipose tissue, predominantly affecting the lower extremities. Symptoms such as pain, heaviness, fatigue, and reduced mobility may adversely affect physical functioning and activities of daily living. Therefore, assessment of functional capacity is an important component of the clinical evaluation of individuals with lipedema.

The Duke Activity Status Index (DASI) is a 12-item self-administered questionnaire that evaluates functional capacity through activities of daily living. The total score ranges from 0 to 58.2, with higher scores indicating better functional capacity. The DASI score can also be used to estimate peak oxygen consumption (VO2 peak).

This methodological study is designed to investigate the psychometric properties of the Turkish version of the DASI in women diagnosed with lipedema. Participants will undergo assessments including the DASI, Six-Minute Walk Test (6MWT), Lower Extremity Functional Scale (LEFS), and 36-Item Short Form Health Survey (SF-36). The DASI will be administered again after a 7-day interval to evaluate test-retest reliability.

Test-retest reliability and internal consistency of the Turkish DASI will be examined. Construct validity will be evaluated by examining the relationships between DASI scores and measures of functional exercise capacity, lower extremity function, and health-related quality of life. The study aims to determine whether the Turkish version of the DASI provides a valid, reliable, and practical instrument for assessing functional capacity in women with lipedema.

Inclusion Criteria:

• Female sex.
• Aged 18 to <65 years.
• Diagnosis of lipedema.
• No participation in a physiotherapy program within the previous 3 months.
• No history of liposuction surgery.
• Not currently following a weight-loss diet.
• No change in body weight greater than 10% within the previous 6 months.
• Willing to participate in the study and able to provide informed consent.

Exclusion Criteria:

• Severe visual or cognitive impairment.
• Severe cardiovascular disease.
• Musculoskeletal disorders or injuries affecting the lower extremities, including osteoarthritis, contracture, or osteoporosis, that may interfere with study assessments.
• Skin conditions that may interfere with the assessments, such as pressure ulcers.
• Uncontrolled endocrine disorders, including type 1 or type 2 diabetes mellitus or hypothyroidism.
• Obesity secondary to endocrine disorders or medication-induced obesity.
• Use of estrogen-progestin therapy within the previous 2 months.
• Pregnancy or a positive pregnancy test.
• Breastfeeding.
• Concurrent participation in another clinical trial.