Association between Sarcopenic Obesity and Metabolic Syndrome in Postmenopausal Women: A Cross-sectional Study Based on the Korean National Health and Nutritional Examination Surveys from 2008 to 2011

BACKGROUND: Menopause contributes to an increase in visceral fat mass and a decrease in muscle protein synthesis. Therefore, we performed this study to examine their relationship how effect the changes of body composition as obesity and sarcopenia on metabolic syndrome (MS) as a predictor of cardiovascular disease in postmenopausal women. METHODS: Using data from the Korean National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2011, we estimated that 4,183 postmenopausal women underwent dual energy X-ray absorptiometry scans. Sarcopenia was defined as an appendicular skeletal muscle mass divided by body weight that was less than 1 standard deviation below the sex specific mean for the young reference group. After classification into four groups, the results were adjusted with menopausal age and hormonal treatment. The relationship between sarcopenic obesity (SO) and MS in postmenopausal women was analyzed by logistic regression analysis in a complex sampling. RESULTS: In an unadjusted model, the odds ratio (OR) of MS for sarcopenia was 1.94 (95% confidence interval [CI], 1.52-2.49); the obesity group had an OR of 4.55 (95% CI, 3.63-5.71); and distinctly, the SO group had an OR of 6.26 (95% CI, 5.10-7.70). Even though there was controlling for variable adjustment, no definite difference was seen in the results. CONCLUSIONS: Sarcopenia and obesity were associated with MS independent of other metabolic impairment risk factors in both early menopausal and postmenopausal women. The results showed that, in particular, the prevalence of MS has increased more in postmenopausal women compared with previous research.

Secular Trends for Body-shape Perception, Weight-loss Efforts, and Weight-loss Behaviors in Korean Adults Using the Korea National Health and Nutrition Examination Survey from 2001 to 2014

BACKGROUND: The objective of study was to investigate secular trends for body-shape perception, weight-loss efforts, and weight-loss behaviors from 2001 to 2014 in Korean adults and factors related to those weight-related attitude. METHODS: Self-reported body-shape perception, weight-loss efforts, and weight-loss behaviors were used in 26,480 men and 35,051 women aged 19 or older using the Korean National Health and Nutrition Survey from 2001 to 2014 (from 2005 to 2014 for weight-loss behaviors). Multivariable logistic regression analysis was conducted using complex sampling design in each sex. RESULTS: Body-shape misperception tended to decrease from 2001 to 2014 and weight-loss efforts tended to increase over the period in all subjects, whereas unhealthy weight-loss behaviors tended to increase over the period in women. In multivariable logistic regression model, body-shape misperception in men was inversely associated with survey year, while positively associated with age and weight status. In women, body-shape misperception was inversely associated with survey year, education, and income, while positively associated with age and weight status. Weight-loss efforts in both sexes were inversely associated with age, while positively associated with survey year, education, income, and weight status. Healthy weight-loss behaviors were positively associated with education but inversely associated with age in men. In women, those behaviors were positively associated with education and weight status, while inversely associated with survey year. CONCLUSIONS: We found decreased body-shape misperception and increased weight-loss efforts in Korean men and women from 2001 to 2014, and decreased healthy weight-loss behaviors in women from 2005 to 2014.

The Relationship between Daily Sodium Intake and Obesity in Korean Adults

BACKGROUND: World health organization (WHO) recommended daily sodium intake less than 2 g. To assess the validity of WHO recommendation, we investigated the relationship between daily sodium intake and obesity. METHODS: A total of 14,694 participants aged > or =19 years who had no missing data for nutrition, chronic disease, health behavior, economic status and laboratory findings from the 5th Korean National Health and Nutrition Examination Survey (KNHANES-V), which was performed from 2010 to 2012. Obesity was defined as having a body mass index of 25 kg/m2 or higher. Daily sodium intake was calculated from 24 hour recall and divided into five categories ( or =8 g). The association between daily sodium intake and obesity was analyzed using multiple logistic regressions. RESULTS: Higher sodium intake in men had an increased risk of obesity with odds ratios (ORs) of 1.27 for 2-4 g intake (95% confidence interval [CI], 0.97-1.67), 1.40 for 4-6 g intake (95% CI, 1.07-1.85), 1.41 for 6-8 g intake (95% CI, 1.05-1.89), and 1.61 for > or =8 g intake (95% CI, 1.19-2.18), compared to men with less than 2 g intake, after adjusting for confounding factors. The P value for trend of ORs in each group for men was 0.020. In women, compared to the lesser than 2 g intake, only > or =8 g intake group had an OR of 1.28 (95% CI, 1.02-1.62) without showing significant P for trend (P value for trend=0.221) CONCLUSIONS: We found that sodium intake more than 2 g per day was independently related to the increased risk of obesity in men. Therefore, to minimize the risk of obesity, we suggest taking sodium less than 2 g per day.