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Figure 2 | BMC Musculoskeletal Disorders

Figure 2

From: Use of anthropometric indicators in screening for undiagnosed vertebral fractures: A cross-sectional analysis of the Fukui Osteoporosis Cohort (FOC) study

Figure 2

ROC analysis of the expected probability for detection of existing vertebral deformities. WOD: Wall-occiput distance, AHD: Arm span-height difference, Sen: Sensitivity, Spe: Specificity, LR: Likelihood ratio for a positive result, AUC: Area under the curve, 95% CI: 95% confidence interval, WOD ( + ): values of 5 mm or above, AHD ( + ): values of 4.0 cm or above. Arrow indicates the Youden index [26]. The solid line shows the ROC curve of vertebral fractures by the expected probability of existing vertebral deformities. The expected probability (P) of existing vertebral fractures was calculated using the following formula: P = 1-(exp[-1.327–0.040 × body weight+1.332 × WOD-positive+1.623 × AHD-positive])-1, where positive results for WOD or AHD were assigned a value of 1, and negative results were assigned a value of 0. The cutoff value was determined from the Youden index [26]. The black circle () in the figure identifies sensitivity and specificity values for WOD and AHD, both independently and in combination.

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