Paper Title
CORRELATION BETWEEN PERFORMANCE OF TIMED SIT-TO-STAND TEST AND BALANCE CONTROL AMONG OLDER ADULTS: A CROSS-SECTIONAL STUDY

Abstract
Abstract - Background: Aging is an inevitable process of life development. The deterioration of balance control in aging process may contribute to higher fall risk. Sit-to-stand motion is one of most daily-life movement for position transfer and essential to maintenance of mobility in elderly. Timed sit-to-stand test allows healthcare to measure the status of low-limb muscle strength in individuals but its association with balance is not clear. The purpose of this study was to investigate the association of timed sit-to-stand performance with balance control among older adults. Results from this study may be helpful to approach high fall risk in older adults. Methods: We conducted a cross-sectional study and reviewed data derived from the National Physical Fitness Survey in Taiwan (NPFS 2015–16). A total of 20,846 Taiwanese elderly aged 65 years or older were recruited as study participants. Demographic characteristics, anthropometric assessments, lifestyle habits, and health-related physical fitness measurements from this dataset were analyzed using the chi-square test, one-way analysis of variance, and linear regression analysis. Lower-limb muscle strength performance was classified into 4 groups based on quartile (Q1-Q4) values. Results: The increased lower-limb muscle strength levels were significantly associated with static balance in men (Q2: β = 2.539, p < 0.0001; Q3: β = 4.590, p < 0.0001; Q4: β = 7.700, p < 0.0001) and women (Q2: β = 2.022, p < 0.0001; Q3: β = 4.179, p < 0.0001; Q4: β = 6.920, p < 0.0001) after adjusting potential confounders. In addition, we observed that increased lower-limb muscle strength levels were significantly associated with dynamic balance in men (Q2: β = -1.661, p < 0.0001; Q3: β = -2.434, p < 0.0001; Q4: β = -3.091, p < 0.0001) and women (Q2: β = -1.660, p < 0.0001; Q3: β = -2.548, p < 0.0001; Q4: β = -3.196, p < 0.0001) after adjusting potential confounders. Conclusions: The performance of timed sit-to-stand test was positively associated with static and dynamic balance control in elderly. Keywords - Timed Sit-To-Stand Test, Balance, Elderly, Cross-Sectional Study