Figure 9
(a–d) Relative amplitude and ultrasound entropy values obtained from Groups I and II; (e–h) Relative amplitude and ultrasound entropy values obtained from subjects with different OSTAi scores in Group III; (i–p) ROC curves and sensitivity/specificity as a function of cut-off value for using amplitude and ultrasound entropy to identify moderate-to-high risk of osteoporosis (OSTAi ≥ − 1). Comparisons of data for (a–d) were made using the independent t-test, and those for (e–h) were performed using one-way ANOVA. The symbol ‘*’ indicates significant differences.
