Body composition.
Body composition was estimated using a multifrequency bioimpedance analysis (BIA) with the InBody S10 analyzer (Biospace Co.). All subjects were positioned in a supine position. Contact electrodes were placed on thumbs and middle fingers of both hands and in the space between the malleolus and heel of lower extremities. An alternating intensity of electrical current was applied between the hand and foot of one side. InBody uses an 8-point tetrapolar electrode system method, which assesses the impedance to 6 specific frequencies (1, 5, 50, 250, 500, and 1,000 kHz). The electrical current passes through different tissues depending on the impedance. InBody S10 provides a ratio of extra cellular water/total body water (ECW/TBW) from body segments (both arms, legs, trunks, and whole body) derived from segmental impedance. 