Morbidity and mortality after lifestyle intervention for people with impaired glucose tolerance: 30-year results of the Da Qing Diabetes Prevention Outcome Study

Published on Jun 1, 2019in The Lancet Diabetes & Endocrinology24.54
· DOI :10.1016/S2213-8587(19)30093-2
Qiuhong Gong1
Estimated H-index: 1
(Academy of Medical Sciences, United Kingdom),
Ping Zhang38
Estimated H-index: 38
(CDC: Centers for Disease Control and Prevention)
+ 48 AuthorsGojka Roglic22
Estimated H-index: 22
Summary Background Lifestyle interventions can delay the onset of type 2 diabetes in people with impaired glucose tolerance, but whether this leads subsequently to fewer complications or to increased longevity is uncertain. We aimed to assess the long-term effects of lifestyle interventions in people with impaired glucose tolerance on the incidence of diabetes, its complications, and mortality. Methods The original study was a cluster randomised trial, started in 1986, in which 33 clinics in Da Qing, China, were randomly assigned to either be a control clinic or provide one of three interventions (diet, exercise, or diet plus exercise) for 6 years for 577 adults with impaired glucose tolerance who usually receive their medical care from the clinics. Subsequently, participants were followed for up to 30 years to assess the effects of intervention on the incidence of diabetes, cardiovascular disease events, composite microvascular complications, cardiovascular disease death, all-cause mortality, and life expectancy. Findings Of the 577 participants, 438 were assigned to an intervention group and 138 to the control group (one refused baseline examination). After 30 years of follow-up, 540 (94%) of 576 participants were assessed for outcomes (135 in the control group, 405 in the intervention group). During the 30-year follow-up, compared with control, the combined intervention group had a median delay in diabetes onset of 3·96 years (95% CI 1·25 to 6·67; p=0·0042), fewer cardiovascular disease events (hazard ratio 0·74, 95% CI 0·59–0·92; p=0·0060), a lower incidence of microvascular complications (0·65, 0·45–0·95; p=0·025), fewer cardiovascular disease deaths (0·67, 0·48–0·94; p=0·022), fewer all-cause deaths (0·74, 0·61–0·89; p=0·0015), and an average increase in life expectancy of 1·44 years (95% CI 0·20–2·68; p=0·023). Interpretation Lifestyle intervention in people with impaired glucose tolerance delayed the onset of type 2 diabetes and reduced the incidence of cardiovascular events, microvascular complications, and cardiovascular and all-cause mortality, and increased life expectancy. These findings provide strong justification to continue to implement and expand the use of such interventions to curb the global epidemic of type 2 diabetes and its consequences. Funding US Centers for Disease Control and Prevention, WHO, Chinese Center for Disease Control and Prevention, World Bank, Ministry of Public Health of the People's Republic of China, Da Qing First Hospital, China–Japan Friendship Hospital, and National Center for Cardiovascular Diseases & Fuwai Hospital.
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