Ultrasonography or direct radiography? A comparison of two techniques to detect dorsal screw penetration after volar plate fixation

Table 3 Diagnostic screening tests and ROC curve results according to USG screw penetration

	Diagnostic scan				Kappa agreement	ROC curve		p
	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Kappa agreement	Area	95% Confidence interval	p
Lateral radiograph	41.67	100.0	100.0	83.33	0.515	0.708	0.511–0.905	0.033*
45° supination view	50.00	100.0	100.0	85.37	0.598	0.750	0.560–0.940	0.010*
45° pronation view	16.67	100.0	100.0	77.78	0.230	0.583	0.382–0.784	0.393
Dorsal tangential view	58.33	100.0	100.0	87.50	0.676	0.792	0.611–0.972	0.003**

ISSN: 1749-799X