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Evidence-Based Complementary and Alternative Medicine
Volume 2013, Article ID 263752, 10 pages
Research Article

Development and Validation of the Digestive Function Assessment Instrument for Traditional Korean Medicine: Sasang Digestive Function Inventory

1Department of Sasang Constitutional Medicine, Pusan National University Korean Medicine Hospital, Busan 626-789, Republic of Korea
2Sasang and Personalized Medicine Research Center, Pusan National University, Busan 609-735, Republic of Korea
3Division of Clinical Medicine, School of Korean Medicine, Pusan National University, Busan 626-870, Republic of Korea
4Department of Sasang Constitutional Medicine, College of Korean Medicine, Kyung Hee University, Seoul 130-701, Republic of Korea
5Division of Longevity and Biofunctional Medicine, School of Korean Medicine, Pusan National University, Busan 609-735, Republic of Korea
6Department of Psychiatry, School of Medicine, Washington University, Saint Louis, MO 63110, USA

Received 5 June 2013; Revised 3 August 2013; Accepted 19 August 2013

Academic Editor: Jong Yeol Kim

Copyright © 2013 Misuk Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. This study was conducted for development and validation of the Sasang Digestive Function Inventory (SDFI) with type-specific digestive function-related symptoms for identification of Sasang type and pathological pattern. Methods and Materials. We selected questionnaire items for pathophysiological symptoms using internal consistency analysis and examined construct validity using 193 healthy participants. Test-retest reliability with a four-week interval as well as convergent validity was examined using the Nepean Dyspepsia Index-Korean (NDIK), Functional Dyspepsia-Related Quality of Life (FDQOL), Dutch Eating Behavior Questionnaire (DEBQ), and Body Mass Index (BMI). Results. The 21-item SDFI showed satisfactory internal consistency (Cronbach’s alpha = 0.743) and test-retest reliability ( , ). Three extracted subscales, SDFI-Digestion, SDFI-Appetite, and SDFI-Eating pattern, explained 56.02% of the total variance. The SDFI showed significant ( ) correlation with total symptom score of NDIK, FDRQOL-Eating status, DEBQ-External Eating scale, and BMI. The SDFI score of the Tae-Eum ( ) type was significantly ( ) larger than that of the So-Eum ( ) type. Conclusion. Current results demonstrated the reliability and validity of the SDFI and its subscales, which can be utilized as an objective instrument for diagnosis of Sasang types and assessment of the type-specific digestive function.