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Effect of Glucose Control, SDSCA and Quality of Life of D-chiro-inositol(DCI) in patients with type 2 diabetes: A Path Analysis

제2형 당뇨병 환자의 D-chiro-inositol의 혈당강하 효과와 당뇨 자가관리 및 삶의 질: 경로분석

  • Kang, Young Mi (Research Center for Endocrine and Metabolic Diseases, Chungnam National University Hospital) ;
  • Kim, Hyun Jin (Division of Endocrinology and Metabolism, Chungnam National University Hospital) ;
  • Lee, Tae-Yong (Department of Preventive Medicine, Chungnam National University College of Medicine) ;
  • Ku, Bon-Jeong (Division of Endocrinology and Metabolism, Chungnam National University Hospital)
  • 강영미 (충남대학교병원 내분비대사질환특성화연구센터) ;
  • 김현진 (충남대학교병원 내분비대사내과) ;
  • 이태용 (충남대학교 의과대학 예방의학교실) ;
  • 구본정 (충남대학교병원 내분비대사내과)
  • Received : 2018.07.04
  • Accepted : 2018.10.05
  • Published : 2018.10.31

Abstract

This study aimed to investigate the effects of DCI on glucose control, quality of life(SF-36 Version 2.0, Korean) and SDSCA(Summary of Diabetes Self-Care Activities) in patients with type 2 diabetes mellitus. A randomized, double-blind, placebo-controlled study was performed on 46 patients with HbA1c 7.0% taking triple anti-diabetic drug regimen who visited the department of Endocrinology and Metabolism in Chungnam National University Hospital between March 2015 and May 2016. As a result, DCI treatment in the intervention group resulted in significantly reduced HbA1c levels $8.75{\pm}0.79%$(baseline), $8.36{\pm}1.03%$(after 12weeks), and $8.65{\pm}0.81%$(after 24weeks). However, patients in the control group did not show any significant change. Interestingly, both DCI treatment group and the control group significantly showed improvements in SDSCA. Participants in the intervention group showed a small yet significant improvement in their only fasting blood glucose test in SDSCA and revealed significant increase in the quantitative levels of quality of life, from $73.05{\pm}16.85$ to $82.74{\pm}10.68$. By using pathway analysis, improvement of SDSCA scores(${\beta}=-0.505$, t=-2.743) was the most influential factor to the fasting blood glucose. The quality of life of patients with type 2 diabetes mellitus was affected by changes of SDSCA scores(${\beta}=0.411$, t=2.024) and fasting c-peptide(${\beta}=-0.445$, t=-2.668) in DCI treatment group. In conclusion, treatment of DCI effectively improved glucose control in patients with type 2 DM(HbA1c level>7.0%) after 12 weeks of treatment, although it had no impact on glucose control after 24 weeks of treatment. Improved glucose control may encourage diabetic patients to conduct self-care activities and improve the quality of life. Based on the present study, we suggest that diabetes self-management, as well as consideration of comprehensive laboratory findings, may be important factor in regulating the quality of life in type 2 DM patients.

본 연구 목적은 제2형 당뇨병 환자에서의 D-chiro-inositol(DCI)의 혈당강하 효과, 당뇨 자가관리(Summary of Diabetes Self-Care Activities, SDSCA) 및 삶의 질(SF-36 Version 2.0, Korean)에 미치는 요인을 파악하고자 하였다. 연구대상은 충남대학교병원 내분비대사내과에 내원한 제2형 당뇨병 환자 중에서 3제의 경구 혈당강하제를 12주 이상 투여 했음에도 불구하고 당화혈색소 7.0% 이상인 환자를 2015년 3월부터 2016년 5월까지 24주간 무작위 이중맹검 위약대조 임상시험으로 총 46명을 분석하였다. 연구결과, 실험군에서 DCI 투여 이후 당화혈색소 $8.75{\pm}0.79%$(베이스라인), $8.36{\pm}1.03%$(투여 12주), $8.65{\pm}0.81%$(투여 24주)으로 유의하게 감소하였으나(p<0.05), 대조군과의 변화량은 차이가 없었다. 흥미롭게도 실험군과 대조군에서 당뇨 자가관리 점수가 높아졌으며, 특히 실험군 변화량에서의 하부영역인 혈당검사 만이 유의한 차이를 보였고, 삶의 질은 투여 전 $73.05{\pm}16.85$점에서 투여후 $82.74{\pm}10.68$점으로 향상되었다. DCI 투여에 따른 실험군에서의 요인간 경로분석에서 공복 혈당 변화량은 당뇨 자가관리 변화량이 높을수록(${\beta}=-0.505$, t=-2.743) 높다고 확인되었다. 삶의 질 변화량에 가장 큰 영향을 준 변수는 공복 c-펩타이드 변화량이 높을수록(${\beta}=-0.445$, t=-2.668), 당뇨 자가관리 변화량이 높을수록(${\beta}=0.411$, t=2.024) 높은 것으로 확인되었다. 결론적으로 제2형 당뇨병 환자에게 DCI 투여는 투여 12주차에 혈당 강하 효과를 보이고, 24주차에는 없었지만, 혈당강하 효과는 환자의 당뇨 자가관리를 높이고 삶의 질을 향상시켰다. 본 연구에 기초하여 결과적인 지표와 제2형 당뇨병 환자의 주관적인 관점에서 평가될 수 있는 삶의 질에 대한 경로분석을 통하여 모형의 적합도에 관한 연구로써 그 의의가 있다고 본다.

Keywords

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