Mean Hounsfield unit and BMDMDCT values of patients with/without osteoporotic fractures at baseline and follow-up and with/without screw looseninga
| Group Size | Baseline HU | Baseline BMDMDCT Values | Pathology vs No Pathology (HU and BMDMDCT) | ROC AUC (BMDMDCT) | Cutoff and Youden Index | |
|---|---|---|---|---|---|---|
| With baseline fractures | 7 | 70.1 ± 13.2 | 57.2 ± 11.2 | |||
| Without baseline fractures | 55 | 114.4 ± 37.4 | 94.0 ± 29.5 | P < .01b | 0.912c | 68.9 (J = 0.78) |
| With incidental fractures | 8 | 63.8 ± 12.7 | 52.4 ± 10.5 | |||
| Without incidental fractures | 54 | 116.1 ± 36.0 | 95.4 ± 28.4 | P < .001b | 0.972c | 66.8 (J = 0.87) |
| Screw loosening | 28 | 93.4 ± 26.5 | 77.3 ± 22.3 | |||
| Without screw loosening | 21 | 132.9 ± 40.5 | 110.1 ± 30.7 | P < .001b | 0.827c | 92.0 (J = 0.60) |
Note:—ROC indicates receiver operating characteristic analysis; AUC, area under the ROC curve.
↵a Hounsfield units and BMDMDCT values are given as mean ± SD in milligrams per milliliter. Cutoff values are given in milligrams per milliliter.
↵b Adjusted for age, sex, follow-up time, and tube voltage.
↵c P < .001.