Iodine-starch test validity in amputee patients with hyperhidrosis.

Area of Science:

• Dermatology
• Medical Diagnostics
• Prosthetics

Background:

• Hyperhidrosis, a condition causing excessive sweating, impacts quality of life.
• The iodine-starch test is a common diagnostic tool for hyperhidrosis.
• Its utility and reliability in amputee populations require specific validation.

Purpose of the Study:

• To validate the iodine-starch test in amputees by comparing the Amputee Iodine-Starch Result (AISR) with the Hyperhidrosis Disease Severity Scale (HDSS).
• To assess the test-retest reliability of the AISR in patients experiencing hyperhidrosis.

Main Methods:

• Amputee participants underwent iodine-starch testing on residual limbs and prosthetic sheaths.
• The Amputee Iodine-Starch Result (AISR) was calculated based on sweat reaction intensity and area.
• Ordinal logistic regression and intraclass correlation coefficients (ICC) were used for analysis.

Main Results:

• The AISR demonstrated a significant association with the HDSS for both skin and sheath measurements.
• Ordinal logistic regression revealed significant correlations (p<0.005) between AISR and HDSS.
• However, ICC analysis indicated poor test-retest reliability for both skin and sheath measurements (ICC < 0.4).

Conclusions:

• The iodine-starch test, when adapted for amputees (AISR), is significantly associated with hyperhidrosis severity.
• The test exhibits poor test-retest reliability, limiting its use for consistent monitoring in this population.
• Further refinement of the iodine-starch test is necessary for reliable application in amputee hyperhidrosis assessment.