Muscle size and fatty degeneration in the thigh muscles were most positively correlated with the body weight. Bone mineral density was positively correlation with Cross sectional area and Cross sectional muscle area of all thigh mus¬cles, and muscle attenuation coefficient of 2 gluteal muscles and fatty degeneration of 2 mid-thigh muscles. There was no statistically significant difference in the size of the femoral muscle and the de¬gree of fatty degeneration between the two fracture groups.