“…Figure 3 shows the relationship between Δ serum total cholesterol (serum total cholesterol (mg/dL)–250) X age (in years) and Δ Achilles tendon thickness (Achilles tendon thickness (mm) −7.5). The value of 7.5 mm is the upper limit of Achilles tendon thickness of normal Japanese 13 . The correlations of these two indices, A serum total cholesterol X age as x , and Δ Achilles tendon thickness as y , were y = 0.001009 x + 1.323, r = 0.648, P < 0.01 in males and y = 0.000373 x + 2.251, r = 0.408, P < 0.01 in females (Figure 3).…”