1. Screening for Prediabetes and Type 2 Diabetes: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force
- Author
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Cynthia Feltner, Claire Baker, Jonathan D.Y. Yun, Karen Crotty, Colleen Barclay, Casey P. Balio, Russell Harris, Andrea Dotson, Daniel E Jonas, Christiane Voisin, Sian Taylor-Phillips, and Jennifer Cook Middleton
- Subjects
Adult ,Male ,medicine.medical_specialty ,Type 2 diabetes ,Cochrane Library ,law.invention ,Prediabetic State ,Randomized controlled trial ,law ,Diabetes mellitus ,Internal medicine ,Cause of Death ,Medicine ,Humans ,Mass Screening ,Prediabetes ,Obesity ,Aged ,business.industry ,General Medicine ,Middle Aged ,Overweight ,medicine.disease ,Diabetes Mellitus, Type 2 ,Relative risk ,Meta-analysis ,Female ,business ,Body mass index ,Risk Reduction Behavior - Abstract
Importance Type 2 diabetes is common and is a leading cause of morbidity and disability. Objective To review the evidence on screening for prediabetes and diabetes to inform the US Preventive Services Task Force (USPSTF). Data Sources PubMed/MEDLINE, Cochrane Library, and trial registries through September 2019; references; and experts; literature surveillance through May 21, 2021. Study Selection English-language controlled studies evaluating screening or interventions for prediabetes or diabetes that was screen detected or recently diagnosed. Data Extraction and Synthesis Dual review of abstracts, full-text articles, and study quality; qualitative synthesis of findings; meta-analyses conducted when at least 3 similar studies were available. Main Outcomes and Measures Mortality, cardiovascular morbidity, diabetes-related morbidity, development of diabetes, quality of life, and harms. Results The review included 89 publications (N = 68 882). Two randomized clinical trials (RCTs) (25 120 participants) found no significant difference between screening and control groups for all-cause or cause-specific mortality at 10 years. For harms (eg, anxiety or worry), the trials reported no significant differences between screening and control groups. For recently diagnosed (not screen-detected) diabetes, 5 RCTs (5138 participants) were included. In the UK Prospective Diabetes Study, health outcomes were improved with intensive glucose control with sulfonylureas or insulin. For example, for all-cause mortality the relative risk (RR) was 0.87 (95% CI, 0.79 to 0.96) over 20 years (10-year posttrial assessment). For overweight persons, intensive glucose control with metformin improved health outcomes at the 10-year follow-up (eg, all-cause mortality: RR, 0.64 [95% CI, 0.45 to 0.91]), and benefits were maintained longer term. Lifestyle interventions (most involving >360 minutes) for obese or overweight persons with prediabetes were associated with reductions in the incidence of diabetes (23 RCTs; pooled RR, 0.78 [95% CI, 0.69 to 0.88]). Lifestyle interventions were also associated with improved intermediate outcomes, such as reduced weight, body mass index, systolic blood pressure, and diastolic blood pressure (pooled weighted mean difference, −1.7 mm Hg [95% CI, −2.6 to −0.8] and −1.2 mm Hg [95% CI, −2.0 to −0.4], respectively). Metformin was associated with a significant reduction in diabetes incidence (pooled RR, 0.73 [95% CI, 0.64 to 0.83]) and reduction in weight and body mass index. Conclusions and Relevance Trials of screening for diabetes found no significant mortality benefit but had insufficient data to assess other health outcomes; evidence on harms of screening was limited. For persons with recently diagnosed (not screen-detected) diabetes, interventions improved health outcomes; for obese or overweight persons with prediabetes, interventions were associated with reduced incidence of diabetes and improvement in other intermediate outcomes.
- Published
- 2021