The purpose of this study was to investigate the relationship between evaluation variables of sarcopenia(muscle loss due to aging) and health risk factors based on the cross-sectional study. This study analyzed 1,581 person over 50 year old who part ...
The purpose of this study was to investigate the relationship between evaluation variables of sarcopenia(muscle loss due to aging) and health risk factors based on the cross-sectional study. This study analyzed 1,581 person over 50 year old who participated in survey during 2009∼2011. The exclusion of criteria included: a past history of Cardiovascular Disease, Cancer, and limitation of independent mobility. Skeletal muscle mass was measured by bio-impedance analysis and expressed as ASMH2(appendicular skeletal muscle mass / heigh(m2)) and grip and knee-extension strength by dynamometer. We used the SPPB(short physical performance battery) to assess physical performance. Saropenia was defined as ASMH2 in sex-specific lowest 20% of study population. Dynapenia(muscular strength loss due to aging) was defined as muscle strength in lowest quartile of study population. Obesity was defined as values the upper two quintiles for total body fat percentage of study population. Logistic regression analysis was used to evaluate the odds ratio(OR) and 95% confidence interval(95% CI) of prevalence of metabolic syndrome(MS), fall, and physical limitation associated with sarcopenia and dynapenia. All ORs were adjusted for age strata, smoking status, alcohol comsumption, physical activity levels, and obesity degree such as BMI and WC(waist circumference). The results of the present study were as followed : First, the muscle strength, muscle mass, and physical performance were progressively lower with increasing age in both men and women. But, there was difference of age-associated decline among variables. Muscle mass decreased more rapidly than muscle strength with ageing, especially lower extreme strength in men. Second, which the tools of health estimation for elder such as sarcopenia and dynapenia, dynapenia was presented the most relevant result with level of health. Dynapenia and dynapenic obesity whether evaluated by grip strength were significantly associated with a greater prevalence of MS, fall. Compared with normal group, the OR for MS with in men as 2.19(95% confidence interval [CI], 1.03-4.67), 2.46(1.15-5.28) and 0.99(0.56-1.74), 1.76(1.01-3.07) in women. The OR for fall with in men as 7.82(1.70-35.9), 11.2(2.13-59.3) and 2.64(1.15-3.51), 2.42(1.02-5.72) in women respectively. There were dose-response patterns from dynapenia to dynapenic obesity in the OR for most health risk factors. In conclusion, muscle strength is best predict variable for MS and fall risk factors in above 50 year olds and the relative importance varies according to gender. Dynapenia is much valuable than sarcopenia as tool of health estimation for elderly.