Prediabetes: a prevalent and treatable, but often unrecognized, clinical condition

Undiagnosed hypertension and diabetes mellitus in the Tabari cohort: a population-based study

BACKGROUND

Undiagnosed hypertension (HTN) and diabetes mellitus (DM) are major public health challenges worldwide. We aimed to investigate the prevalence of undiagnosed HTN and DM, and their correlates, in a large-scale population-based cohort study.

METHODS

In this cross-sectional study, data collected during the enrollment phase of the Tabari Cohort study (TCS) were utilized. Data were collected in the TCS using a standard questionnaire, blood collection, and measurement of anthropometric indices and blood pressure. Data were analyzed using the chi-squared test and univariate and multivariate logistic regression analyses. Undiagnosed HTN included those who were not aware of HTN at the time of enrollment but had systolic and diastolic blood pressures ≥ 140 mm or ≥ 90 mmHg, respectively. Undiagnosed DM included participants who were unaware of their DM at the time of enrollment and had FBS levels ≥ 126 mg/dL.

RESULTS

The total prevalence of undiagnosed HTN and DM were 5% (508) and 4.7% (485), respectively. The findings of multivariable logistic regression analysis showed that young age (OR: 0.40, P < 0.001), residents of urban regions (OR: 0.70, P = 0.03), lower Body Mass Index kg/m2 (BMI) (OR: 0.51, P = 0.002), waist-to-hip ratio (WHR)(OR: 0.70, P = 0.023), total cholesterol (TC) ≥ 200 mg/dL (OR: 0.1.83, P < 0.001), lack of history of DM (OR: 0.38,P < 0.001), cardiovascular diseases (CVD)(OR: 0.12, P < 0.001), and lack of a positive family history of HTN in first-(OR: 0.39, P < 0.001) and second-degree(OR: 0.56, P = 0.009) relatives were the main predictors of undiagnosed HTN. Accordingly, male sex(OR: 0.52, P = 0.004), young age(OR: 0.28, P < 0.001), residence in urban regions(OR: 0.30, P < 0.001), BMI ≥ 30 (OR: 1.51, P = 0.044), low-density lipoprotein (LDL) ≥ 130 mg/dL (OR:1.93, P < 0.001), TC ≥ 200 mg/dL (95% CI, 1.47-2.51, P < 0.001), positive history of chronic kidney disease (OR:1.39, P = 0.010 ), and lack of family history of first-(OR: 0.38, P < 0.001) and second-degree (OR: 0.62, P < 0.015) DM were the main predictors of undiagnosed DM.

CONCLUSION

Overall, younger participants, those residing in urban areas, those with TC ≥ 200 mg/dL, and those without a positive family history of HTN or DM were at a greater risk of undiagnosed HTN/DM.

Prebiotic Inulin Supplementation and Peripheral Insulin Sensitivity in adults at Elevated Risk for Type 2 Diabetes: A Pilot Randomized Controlled Trial

Prediabetes affects 84.1 million adults, and many will progress to type 2 diabetes (T2D). The objective of this proof-of-concept trial was to determine the efficacy of inulin supplementation to improve glucose metabolism and reduce T2D risk. Adults (n = 24; BMI: 31.3 ± 2.9 kg/m²; age: 54.4 ± 8.3 years) at risk for T2D were enrolled in this controlled feeding trial and consumed either inulin (10 g/day) or placebo (maltodextrin, 10 g/day) for six weeks. Assessments included peripheral insulin sensitivity, fasting glucose, and insulin, HOMA-IR, in vivo skeletal muscle substrate preference, Bifidobacteria copy number, intestinal permeability, and endotoxin concentrations. Participant retention was 92%. There were no baseline group differences except for fasting insulin (p = 0.003). The magnitude of reduction in fasting insulin concentrations with inulin (p = 0.003, inulin = Δ-2.9, placebo = Δ2.3) was attenuated after adjustment for baseline concentrations (p = 0.04). After adjusting for baseline values, reduction in HOMA-IR with inulin (inulin = Δ-0.40, placebo=Δ0.27; p = 0.004) remained significant. Bifidobacteria 16s increased (p = 0.04; inulin = Δ3.1e⁹, placebo = Δ-8.9e⁸) with inulin supplementation. Despite increases in gut Bifidobacteria, inulin supplementation did not improve peripheral insulin sensitivity. These findings question the need for larger investigations of inulin and insulin sensitivity in this population.

The Relationship between Protein Intake and Source on Factors Associated with Glycemic Control in Individuals with Prediabetes and Type 2 Diabetes

Type 2 diabetes (T2D) is a major contributor to morbidity and mortality largely due to increased cardiovascular disease risk. This study examined the relationships among protein consumption and sources on glycemic control and cardiovascular health in individuals with prediabetes and T2D. Sixty-two overweight or obese participants with prediabetes or T2D, aged 45–75 years were stratified into the following three groups based on protein intake: <0.8 g (gram)/kg (kilogram) body weight (bw), ≥0.8 but <1.0 g/kg bw, and ≥1.0 g/kg bw as below, meeting, and above the recommended levels of protein intake, respectively. Body mass, body mass index (BMI), hip circumference (HC), waist circumference (WC), lean mass, and fat mass (FM) were significantly higher in participants who consumed below the recommended level of protein intake as compared with other groups. Higher animal protein intake was associated with greater insulin secretion and lower triglycerides (TG). Total, low-density, and high-density cholesterol were significantly higher in participants who met the recommended protein intake as compared with the other groups. These data suggest that high protein consumption is associated with lower BMI, HC, WC, and FM, and can improve insulin resistance without affecting lipid profiles in this population. Furthermore, higher intake of animal protein can improve β-cell function and lower plasma TG.

Infrared photobiomodulation (PBM) therapy improves glucose metabolism and intracellular insulin pathway in adipose tissue of high-fat fed mice

Obesity represents a continuously growing global epidemic and is associated with the development of type 2 diabetes mellitus. The etiology of type 2 diabetes is related to the resistance of insulin-sensitive tissues to its action leading to impaired blood glucose regulation. Photobiomodulation (PBM) therapy might be a non-pharmacological, non-invasive strategy to improve insulin resistance. It has been reported that PBM therapy in combination with physical exercise reduces insulin resistance. Therefore, the aim of this study was to investigate the effects of PBM therapy on insulin resistance in obese mice. Male Swiss albino mice received low-fat control diet (n = 16, LFC) or high-fat diet (n = 18, HFD) for 12 weeks. From 9th to 12th week, the mice received PBM therapy (LASER) or Sham (light off) treatment and were allocated into four groups: LFC Sham (n = 8), LFC PBM (n = 8), HFD Sham (n = 9), and HFD PBM (n = 9). The PBM therapy was applied in five locations: to the left and right quadriceps muscle, upper limbs and center of the abdomen, during 40 s at each point, once a day, 5 days a week, for 4 weeks (780 nm, 250 mW/cm², 10 J/cm², 0.4 J per site; 2 J total dose per day). Insulin signaling pathway was evaluated in the epididymal adipose tissue. PBM therapy improved glucose tolerance and phosphorylation of Akt (Ser473) and reversed the HFD-induced reduction of GLUT4 content and phosphorylation of AS160 (Ser588). Also, PBM therapy reversed the increased area of epididymal and mesenteric adipocytes. The results showed that chronic PBM therapy improved parameters related to obesity and insulin resistance in HFD-induced obesity in mice.

The association of early life socioeconomic conditions with prediabetes and type 2 diabetes: results from the Maastricht study

Background

Using cross-sectional data from The Maastricht Study, we examined the association of socioeconomic conditions in early life with prediabetes and T2DM in adulthood. We also examined potential mediating pathways via both adulthood socioeconomic conditions and adult BMI and health behaviours.

Methods

Of the 3263 participants (aged 40–75 years), 493 had prediabetes and 906 were diagnosed with T2DM. By using logistic regression analyses, the associations and possible mediating pathways were examined.

Results

Participants with low early life socioeconomic conditions had a 1.56 times higher odds of prediabetes (95% confidence interval (CI) = 1.21-2.02) and a 1.61 times higher odds of T2DM (95% CI = 1.31-1.99). The relation between low early life socioeconomic conditions and prediabetes was independent of current socioeconomic conditions (OR = 1.38, 95% CI = 1.05-1.80), whereas the relation with T2DM was not independent of current socioeconomic conditions (OR = 1.10, 95% CI = 0.87-1.37). BMI party mediated the association between early life socioeconomic conditions and prediabetes.

Conclusions

Socioeconomic inequalities starting in early life were associated with diabetes-related outcomes in adulthood and suggest the usefulness of early life interventions aimed at tackling these inequalities.

Electronic supplementary material

The online version of this article (doi:10.1186/s12939-017-0553-7) contains supplementary material, which is available to authorized users.

Association of self-perceived body image with body mass index and type 2 diabetes-The ADDITION-PRO study

OBJECTIVE

Weight loss is important for prevention of type 2 diabetes and an accurate self-perceived body image can promote weight reduction. We evaluated the association of self-perceived body image with body mass index (BMI) and type 2 diabetes.

METHODS

Data from the Danish ADDITION-PRO cohort study (2009-2011) were used. A total of 2082 men and women attended a health examination including assessment of BMI, waist circumference, the Stunkard scale of self-perceived obesity and an oral glucose tolerance test for assessment of diabetes risk.

RESULTS

Mean (SD) age was 66.2 (6.9) years and 24% were obese (BMI ≥30kg/m(2)). However, only 7% of obese men and 11% of obese women perceived themselves as obese. Among obese women, for a given level of BMI and waist circumference, one unit higher self-perceived body image was associated with 52% (95% CI: 14-73) lower risk of having type 2 diabetes and 45% (95% CI: 12-65) lower risk of having pre-diabetes. Overweight, but not obese, men had a 35% (95% CI: 36-56) lower risk of type 2 diabetes per unit increase in body image.

CONCLUSIONS

Obese individuals seem to underestimate their body shape. However, having a realistic body image (higher self-perceived obesity) is independently associated with lower diabetes risk. Self-perceived body image might serve as a valuable tool for type 2 diabetes risk assessment.

Prevalence of pre-diabetes in young Mexican adults in primary health care

BACKGROUND

Pre-diabetes in young people is frequently unrecognized or not treated on time, with the consequent loss of opportunity for diabetes prevention. In Mexico, there is scarce information about the prevalence of pre-diabetes in young adults.

OBJECTIVE

To determine the prevalence and risk factors for pre-diabetes in young Mexican adults in primary health care.

METHODS

In a cross-sectional study, 288 subjects, aged 18-30 years, from a primary care unit were included. Pre-diabetes was diagnosed (according to the criteria of the American Diabetes Association) as impaired fasting glucose (8-12 hours fasting plasma glucose level: 100-125 mg/dl) or impaired glucose tolerance (140-199 mg/dl after a 2-hour oral glucose tolerance test).

RESULTS

Prevalence of pre-diabetes was 14.6% [95% confidence interval (CI): 10.7-19.2], whereas that of diabetes was 2.4% (95% CI: 1.0-4.9). A high proportion of patients had history of obesity, diabetes, hypertension and consumption of tobacco and alcohol. Pre-diabetic patients were older than normoglycaemics (pre-diabetic patients: 26±4 years versus normoglycaemic subjects: 24±3 years, P = 0.003) and had higher body mass index (BMI; pre-diabetic patients: 29.4±6.8 kg/m(2) versus normoglycaemic subjects: 26.8±5.8 kg/m(2); P = 0.009), particularly in the case of men (pre-diabetic men: 29.3±7.0 kg/m(2) versus normoglycaemic men: 26.4±5.1 kg/m(2); P = 0.03). Although waist circumference showed a trend to be higher among pre-diabetics, no significant differences were found according to gender (among males: pre-diabetics: 99.5±18.8 cm versus normoglycaemics: 93.3±14.4 cm, P = 0.09; among females: pre-diabetics: 91.5±13.8 cm versus normoglycaemics: 85.8±15.9 cm, P = 0.16). Only age and BMI were significantly associated with the presence of pre-diabetes.

CONCLUSIONS

Almost 15% of these young adults had pre-diabetes. Many modifiable and non-modifiable risk factors were present in these patients, but only age and a higher BMI were independent variables significantly associated with pre-diabetes. Timely interventions in primary health care are needed to prevent or delay the progression to diabetes.