TTN and Duchenne muscular dystrophy: In contrast, the median (range) serum titin values in the DMD, BMD, and control groups were 5,704 (374–104,525), 1,768 (151–31,364), and 187 (131–193) pmol/L, respectively, with the DMD group showing a significantly higher serum titin level than the BMD and control groups (p < 0.01 and p < 0.0001, respectively) (Figure 1B) (d = 0.40, 95% CI −0.09 to 0.88).