Analysis on Intervention Studies of Sasang Constitutional Diet : Participant, Intervention, Comparison, and Outcome (PICO)

사상체질 식이중재연구 현황분석 : Participant, Intervention, Comparison, Outcome (PICO)를 중심으로

  • Kim, Ji Hwan (Department of Sasang Constitutional Medicine, College of Korean Medicine, Gachon university)
  • 김지환 (가천대학교 한의과대학 사상체질의학과)
  • Received : 2021.03.11
  • Accepted : 2021.03.18
  • Published : 2021.03.31


Objectives The purpose of this study was to evaluate intervention studies on Sasang Constitutional diet (SCD) through the checks of Participant, Intervention, Comparison, and Outcome (PICO) Methods Randomized controlled trial (RCT) and non-randomized study for intervention (NRSI) about SCD were searched in 4 Korean core databases and other sources, and then PICO was checked. Results 1. Total 10 studies were conducted with 1 RCT and 9 NRSIs. 2. Participants were people with no specific disease, or patients with essential hypertension, hyperlipidemia, obesity, or stroke with diabetes or hyperlipidemia. Most studies were conducted on groups of various Sasang Constitutional types except Taeyangin. 3. Two studies provided participants with meals and exercise. Three studies, instead of providing meals directly, taught participants how to eat SCD on their own. 4. NRSIs have tested the effectiveness of various outcome measures without the presentation of primary outcome, and then concluded that all outcomes were ineffective or some are effective. 5. There was no mention of adverse events. In most studies, a single doctor of Korean medicine diagnosed Sasang Constitution the QSCC II questionnaire. The intervention period ranged from three weeks to three months, and recent studies have conducted interventions for 12 weeks. Conclusions Intervention studies about SCD which were conducted so far have shown problems on the study design of PICO items. The study design and implementation that carefully consider how to maintain similarity between groups, minimize the risk of bias, set primary outcome measure, and control the diet are required.


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