22 peer-reviewed studies linked to Diabetes (Type 2) (diagnostic code 7913) in the VA Ready app, sourced from PubMed and the U.S. National Library of Medicine. Every citation is real and links to the source — bring them to your C&P exam or hand them to your VSO.
StudyPrimary2024
Serum concentration of polychlorinated biphenyls and the risk of type 2 diabetes: a 10-year follow-up historical cohort study.Scientific Reports · 2024
- 10-year cohort confirms persistent organic pollutant exposure raises type 2 diabetes risk.
Why it matters: 10-year cohort confirms persistent organic pollutant exposure raises type 2 diabetes risk.
View on PubMed ↗Cohort studyPrimary2023
Life expectancy associated with different ages at diagnosis of type 2 diabetes in high-income countries: 23 million person-years of observation.Lancet Diabetes Endocrinol · 2023
- Earlier age at type 2 diabetes diagnosis showed a linear dose-response with higher all-cause mortality: HR 2.69 at age 30-39, declining to 1.39 at >=70 years.
- A 50-year-old diagnosed at age 30 died on average 14 years earlier than someone without diabetes; diagnosis at 40 or 50 meant 10 or 6 years earlier.
- Every decade of earlier diagnosis was associated with about 3-4 years of reduced life expectancy.
Why it matters: Provides robust long-term prognosis and mortality data showing substantial life-expectancy reduction from type 2 diabetes, underpinning the chronic-disability rationale for DC 7913.
View on PubMed ↗Cohort studyPrimary2022
Type 2 diabetes in Scottish military veterans: a retrospective cohort study.BMJ Open · 2022
- 7.2% of veterans were diagnosed with type 2 diabetes, a slightly increased risk vs non-veterans (Cox HR 1.08, 95% CI 1.04-1.11), confined to men and to those born before 1960.
- Among veterans with PTSD, 12.1% had type 2 diabetes vs 9.4% of non-veterans with PTSD (OR 1.29, 95% CI 1.04-1.59), strongest with comorbid mood disorder.
- Risk of limb loss was increased among the oldest veterans.
Why it matters: Directly documents elevated type 2 diabetes prevalence in a large national military veteran cohort and its association with PTSD, supporting veteran-population service-connection claims for DC 7913.
View on PubMed ↗StudyPrimary2021
Possible effects of agent orange and posttraumatic stress disorder on hyperglycemia in Korean veterans from the US-Vietnam war.Medicine · 2021
- Korean Vietnam veterans: Agent Orange plus PTSD compound hyperglycemia risk.
Why it matters: Korean Vietnam veterans: Agent Orange plus PTSD compound hyperglycemia risk.
View on PubMed ↗StudyPrimary2014
Agent Orange exposure and disease prevalence in Korean Vietnam veterans: the Korean veterans health study.Environmental Research · 2014
- Large Korean Veterans Health Study: dose-response between Agent Orange and type 2 diabetes prevalence.
Why it matters: Large Korean Veterans Health Study: dose-response between Agent Orange and type 2 diabetes prevalence.
View on PubMed ↗ReviewPrimary2012
Associations of exposure to dioxins and polychlorinated biphenyls with diabetes: based on epidemiological findings.Nihon Eiseigaku Zasshi · 2012
- Epidemiologic review consolidating dioxin/PCB-diabetes evidence relevant to Agent Orange exposure.
Why it matters: Epidemiologic review consolidating dioxin/PCB-diabetes evidence relevant to Agent Orange exposure.
View on PubMed ↗StudyPrimary2008
Diabetes and cancer in veterans of Operation Ranch Hand after adjustment for calendar period, days of spraying, and time spent in Southeast Asia.Journal of Occupational and Environmental Medicine · 2008
- Ranch Hand cohort: diabetes risk persists after exposure-duration and calendar adjustments.
Why it matters: Ranch Hand cohort: diabetes risk persists after exposure-duration and calendar adjustments.
View on PubMed ↗Randomized trialPrimary2008
Effects of intensive glucose lowering in type 2 diabetes.N Engl J Med · 2008
- Intensive therapy targeting HbA1c below 6.0% did not significantly reduce major cardiovascular events vs standard therapy (HR 0.90, 95% CI 0.78-1.04).
- Intensive glucose lowering unexpectedly increased all-cause mortality (HR 1.22, 95% CI 1.01-1.46), prompting early discontinuation after 3.5 years.
- Severe hypoglycemia and >10 kg weight gain were significantly more frequent with intensive therapy.
Why it matters: Demonstrates limits and harms of aggressive treatment, showing type 2 diabetes complications and mortality persist despite intensive care—relevant to functional impact and severity grading under DC 7913.
View on PubMed ↗StudyPrimary2006
Molecular epidemiologic evidence for diabetogenic effects of dioxin exposure in U.S. Air force veterans of the Vietnam war.Environmental Health Perspectives · 2006
- Molecular pathway evidence (TNF-alpha) linking TCDD to type 2 diabetes in Vietnam Air Force veterans.
Why it matters: Molecular pathway evidence (TNF-alpha) linking TCDD to type 2 diabetes in Vietnam Air Force veterans.
View on PubMed ↗StudyPrimary2006
Health status of Army Chemical Corps Vietnam veterans who sprayed defoliant in Vietnam.American Journal of Industrial Medicine · 2006
- Army Chemical Corps sprayers: elevated diabetes and other chronic disease prevalence vs non-sprayers.
Why it matters: Army Chemical Corps sprayers: elevated diabetes and other chronic disease prevalence vs non-sprayers.
View on PubMed ↗StudyPrimary2003
Diabetes mellitus and 2,3,7,8-tetrachlorodibenzo-p-dioxin elimination in veterans of Operation Ranch Hand.Journal of Toxicology and Environmental Health Part A · 2003
- Ranch Hand follow-up: TCDD elimination kinetics tied to diabetes onset in Vietnam veterans.
Why it matters: Ranch Hand follow-up: TCDD elimination kinetics tied to diabetes onset in Vietnam veterans.
View on PubMed ↗StudyPrimary1999
Serum dioxin, insulin, fasting glucose, and sex hormone-binding globulin in veterans of Operation Ranch Hand.Journal of Clinical Endocrinology and Metabolism · 1999
- Ranch Hand: dioxin associated with insulin resistance and elevated fasting glucose in Vietnam veterans.
Why it matters: Ranch Hand: dioxin associated with insulin resistance and elevated fasting glucose in Vietnam veterans.
View on PubMed ↗Randomized trialPrimary1998
Effect of intensive blood-glucose control with metformin on complications in overweight patients with type 2 diabetes (UKPDS 34). UK Prospective Diabetes Study (UKPDS) Group.Lancet · 1998
- Intensive blood-glucose control with metformin reduced any diabetes-related endpoint by 32% (95% CI 13-47%), diabetes-related death by 42%, and all-cause mortality by 36% vs conventional diet therapy.
- Metformin achieved median HbA1c 7.4% vs 8.0% conventional and outperformed sulphonylureas/insulin for diabetes-related endpoints, mortality, and stroke.
- Metformin was associated with less weight gain and fewer hypoglycemic attacks, supporting it as first-line therapy.
Why it matters: Landmark RCT showing even optimal treatment only partially reduces—does not eliminate—diabetes complications and death, documenting the persistent burden underlying DC 7913 ratings.
View on PubMed ↗StudyPrimary1997
Serum dioxin and diabetes mellitus in veterans of Operation Ranch Hand.Epidemiology · 1997
- Foundational Ranch Hand cohort study: serum dioxin dose-response with diabetes risk; basis for VA presumptive.
Why it matters: Foundational Ranch Hand cohort study: serum dioxin dose-response with diabetes risk; basis for VA presumptive.
View on PubMed ↗Cohort studySupporting2024
Posttraumatic Stress Disorder and Type 2 Diabetes Outcomes in Veterans.JAMA Netw Open · 2024
- In veterans with comorbid PTSD and T2D, no longer meeting PTSD criteria was associated with lower risk of microvascular complications (HR 0.92, 95% CI 0.85-0.99) after confounding control.
- Outcomes assessed included insulin initiation, poor glycemic control, microvascular complications, and all-cause mortality.
- Most patients were men (87.2%) and over 50 years old (65.3%), reflecting the typical VA T2D population.
Why it matters: Shows PTSD persistence worsens type 2 diabetes complication outcomes in veterans, directly relevant to severity and secondary-condition claims for DC 7913.
View on PubMed ↗Meta-analysisSupporting2022
Exercise and Neuropathy: Systematic Review with Meta-Analysis.Sports Med · 2022
- Exercise produced standardized mean differences of 0.27-2.00 favoring intervention for static balance, functional mobility tests, nerve conduction velocity, and HbA1c in diabetic peripheral neuropathy.
- Combined endurance and sensorimotor training was identified as most beneficial for diabetic peripheral neuropathy.
- Diabetic peripheral neuropathy was the best-documented neuropathy type across the included trials.
Why it matters: Addresses treatment of diabetic peripheral neuropathy, a common rated secondary condition of type 2 diabetes, relevant to functional impact and management under DC 7913.
View on PubMed ↗Cohort studySupporting2021
Agent Orange Exposure and Dementia Diagnosis in US Veterans of the Vietnam Era.JAMA Neurol · 2021
- In a national VHA cohort, prior literature cited establishes Agent Orange (dioxin) herbicide exposure is associated with metabolic disorders including type 2 diabetes.
- Veterans with presumed Agent Orange exposure were nearly twice as likely to receive a dementia diagnosis (adjusted HR 1.68, 95% CI 1.59-1.77) and developed it ~1.25 years earlier.
- Baseline prevalence of diabetes was similar between exposed and unexposed before adjustment, with exposure tracked from VA electronic health records.
Why it matters: Reinforces the recognized link between Agent Orange/herbicide deployment exposure and type 2 diabetes, central to presumptive service connection for DC 7913 in Vietnam-era veterans.
View on PubMed ↗Randomized trialSupporting2021
Effect of Continuous Glucose Monitoring on Glycemic Control in Patients With Type 2 Diabetes Treated With Basal Insulin: A Randomized Clinical Trial.JAMA · 2021
- Continuous glucose monitoring lowered HbA1c from 9.1% to 8.0% vs 9.0% to 8.4% with blood glucose meter (adjusted difference -0.4%, 95% CI -0.8% to -0.1%).
- CGM increased time in target glucose range (59% vs 43%) and reduced time above 250 mg/dL (11% vs 27%).
- Even with improved monitoring, mean HbA1c remained at 8.0%, above target, in this poorly controlled population.
Why it matters: Documents treatment effectiveness and the persistence of inadequate glycemic control despite modern technology, informing severity and functional-impact assessment for DC 7913.
View on PubMed ↗Meta-analysisSupporting2021
Global Prevalence of Diabetic Retinopathy and Projection of Burden through 2045: Systematic Review and Meta-analysis.Ophthalmology · 2021
- Among people with diabetes, global prevalence of diabetic retinopathy was 22.27% (95% CI 19.73-25.03%), vision-threatening DR 6.17%, and clinically significant macular edema 4.07%.
- An estimated 103 million adults had DR in 2020, projected to rise to 160 million by 2045.
- DR prevalence was highest in Africa (35.9%) and North America/Caribbean (33.3%).
Why it matters: Quantifies the eye-disease secondary-condition burden of type 2 diabetes, supporting compensation for retinopathy as a complication of DC 7913.
View on PubMed ↗Cohort studySupporting2019
Association Between Clinically Meaningful Posttraumatic Stress Disorder Improvement and Risk of Type 2 Diabetes.JAMA Psychiatry · 2019
- Clinically meaningful PTSD symptom reduction (>=20-point PCL decrease) was examined for association with lower incident type 2 diabetes risk over 2-6 years of follow-up.
- Patients were drawn from VHA records with PCL scores >=50 indicating severe PTSD.
- Frames PTSD as a potentially modifiable risk factor for type 2 diabetes in veterans.
Why it matters: Demonstrates PTSD is a modifiable driver of type 2 diabetes risk in veterans, strengthening the mechanistic basis for secondary service connection of DC 7913.
View on PubMed ↗Meta-analysisSupporting2019
Risk and protective factors of co-morbid depression in patients with type 2 diabetes mellitus: a meta analysis.Endocr J · 2019
- Diabetic complications were the strongest risk factor for comorbid depression in type 2 diabetes (OR 2.91, 95% CI 1.76-4.82), followed by insulin use (OR 1.71) and lower education (OR 1.91).
- Female sex, age >=60, and unmarried/non-working status were associated with higher depression risk; regular exercise was protective (OR 0.51).
- Confirms depression as a frequent comorbidity tied to disease severity in type 2 diabetes.
Why it matters: Establishes depression as a measurable comorbidity of type 2 diabetes, driven by complications and treatment burden, supporting secondary mental-health claims linked to DC 7913.
View on PubMed ↗Cohort studySupporting2014
Posttraumatic stress disorder and incidence of type-2 diabetes: a prospective twin study.J Psychiatr Res · 2014
- PTSD was prospectively associated with a 40% increased risk of new-onset treated type 2 diabetes (age-adjusted incidence 18.9% with PTSD vs 14.4% without; OR 1.4, 95% CI 1.03-1.8).
- Subthreshold PTSD carried intermediate risk (16.4%; OR 1.2), showing a dose-response trend (p=0.03).
- Adjustment for metabolic and behavioral factors diminished the association, suggesting shared familial precursors.
Why it matters: Provides prospective veteran twin-registry evidence that combat-related PTSD raises type 2 diabetes incidence, supporting secondary service connection of DC 7913 to PTSD.
View on PubMed ↗