OBJECTIVES Low handgrip strength (HGS) in children and adolescents might be associated with the risk of metabolic syndrome (MetS) and insulin resistance. This study prospectively evaluated the association between HGS in childhood and MetS in adolescence.
METHODS
Based on data from the Ewha Birth and Growth Study, this study analyzed HGS at ages 7 to 9 and metabolic indices at ages 13 to 15. In total, 219 participants were analyzed. The risk of MetS was evaluated using the continuous metabolic syndrome score (cMetS), and insulin resistance was assessed using fasting blood insulin and homeostasis model assessment of insulin resistance (HOMA-IR). Relative HGS in childhood was determined by dividing HGS by body weight and categorized as sex-specific quartiles.
RESULTS
This study found an inverse association between relative HGS levels in childhood and MetS and insulin resistance in adolescence. For each 1-group increase in relative HGS quartiles, cMetS (standarard [Std] β=-0.64, p<0.01), HOMA-IR (Std β=-0.21, p<0.01), and fasting blood insulin (Std β=-0.21, p<0.01) all decreased on average. These associations remained significant even after adjusting for confounding factors.
CONCLUSIONS
Our study showed a prospective association between HGS in childhood and the risk of MetS and insulin resistance in adolescence. It provides significant epidemiological evidence, emphasizing the importance of efforts to increase muscle strength from a young age to mitigate the risk of MetS and insulin resistance in adolescence.
Summary
Korean summary
본 연구는 소아기 악력 수준이 청소년기의 대사증후군 및 인슐린 저항성과 연관이 있음을 발견했음. 이러한 결과는 소아기 근력 향상이 향후 대사 위험을 완화하는데 중요함을 강조함.
Key Message
This study found that higher childhood relative handgrip strength was inversely associated with metabolic syndrome and insulin resistance in adolescence. The findings emphasize the importance of enhancing muscle strength early in life to mitigate metabolic risks.
<sec><title>OBJECTIVES</title><p>We aimed to determine the characteristics affecting insulin resistance in non-obese middle-aged adults in a rural community.</p></sec><sec><title>METHODS</title><p>A total of 1,270 non-diabetic adults aged between 40 and 64 years old with body mass index (BMI) less than 25 kg/m<sup>2</sup> were analyzed. Subjects with insulin resistance were defined as those who had the highest quartile value of the homeostasis model assessment of insulin resistance (HOMA-IR) in a non-diabetic population.</p></sec><sec><title>RESULTS</title><p>A total of 217 subjects (20.6%) had insulin resistance. Prevalence of metabolic syndrome was significantly higher in insulin-resistant subjects in both men (29.3% vs. 10.3%) and women (34.1% vs. 15.6%). Among metabolic syndrome components, elevated waist circumference and elevated triglyceride were higher in insulin-resistant subjects in both genders. After being controlled for socioeconomic status and lifestyle related covariates, the association between insulin resistance and BMI was statistically significant in the category of 23.0-24.9 kg/m<sup>2</sup> in men (adjusted OR, 4.63; 95% confidence interval [95% CI], 1.77-12.15) using the category of 18.5-20.9 kg/m<sup>2</sup> as a reference. In addition, the association between insulin resistance and abdominal obesity was statistically significant only for men (adjusted OR, 2.57; 95% CI, 1.29-5.11).</p></sec><sec><title>CONCLUSION</title><p>Insulin resistance appears to be highly associated with high BMI and abdominal obesity, even in non-obese, non-diabetic middle-aged men.</p></sec>
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BACKGROUND AND PURPOSE: Insulin resistance has been known to be associated with the risk of cardiovascular diseases.
However, the relationship with Framingham risk score among type 2 diabetes has not been well known. We investigated the relationship between insulin resistance (IR) and the Framingham risk score(FRS) among type 2 diabetes in Korea.
METHODS
We estimated the 5-year risk of ischemic heart disease(IHD) based on Framingham equation among 1,941 diabetes patients(1,294 men and 647 women), who visited Huh's clinic, enrolled from January 2003 to June 2006. IR, which was measured by insulin tolerance test (ITT), was divided into five groups(Q1 to Q5). High risk of IHD was defined as upper 10 percentile of FRS. Multivariate regression and logistic regression models were used to see independent association of higher quintiles of IR level, compared with lowest quintile(Q1) for the risk of IHD.
RESULTS
Mean (+/-standard deviation) 5-year FRS of study subjects were 8.40%(+/-6.89) for men and 5.92%(+/-5.23) for women. There were significant correlation between IR, body mass index, HbA1C, fasting glucose, triglyceride, LDL-cholesterol, C-peptide and FRS in both men and women.
After adjusting for triglyceride, LDL-cholesterol, C-peptide, multivariate regression model analysis showed that IR was independently associated with the FRS. A positive association between IR and high risk of IHD was observed in men: highest versus lowest quintile of IR (odds ratio 5.45 in men and 4.71 in women).
CONCLUSION
Increased IR level was independently associated with risk of IHD measured by FRS among type 2 diabetes in Korea.
Both obesity and diabetes have been proposed as risk factors of cancer. Obesity may be a more significant health problem, which can increase the risk of cancer and cardiovascular disease, which is the most common cause of death. Insulin resistance and metabolic syndrome are suspected of being correlated with cancer risk. Most studies are carried out on the assumption that obesity, diabetes, cardiovascular disease, and cancer are different conditions. However, they have common risk factors-smoking, obesity, and physical inactivity. Although the pathways leading to these diseases are unknown, we brought a focus into the multi-dimensional pathways instead of single pathogenesis. The interaction between pathogenesis can be thought to start from risk factors, and through pathogenesis, diseases can also lead to a severe cause of death. Epidemic of obesity and diabetes is a significant and growing public health problem. This paper reviewed the evidences of the correlation between insulin resistances and cancer and we explored whether insulin resistance may contribute to carcinogenesis.