Three-dimensional printing models increase inter-rater agreement for classification and treatment of proximal humerus fractures

Table 3 Kappa coefficient by type of classification, treatment indicated, and methods of diagnosis

	AO/OTA					Neer
	3D Models		CT			3D Models		CT
	Kappa	p	Kappa	p		Kappa	p	Kappa	p
Classification					Classification
All specialists	0.470	< 0.001	0.436	< 0.001	All specialists	0.544	< 0.001	0.464	< 0.001
Fractures Type A	0.653	< 0.001	0.642	< 0.001	1-part	0.602	< 0.001	0.733	< 0.001
Fractures Type B	0.363	< 0.001	0.241	< 0.001	2-parts	0.606	< 0.001	0.581	< 0.001
Fractures Type C	0.383	< 0.001	0.465	< 0.001	3-parts	0.465	< 0.001	0.326	< 0.001
					4-parts	0.538	< 0.001	0.444	< 0.001
Shoulder surgeons	0.700	< 0.001	0.631	< 0001	Shoulder surgeons	0.784	< 0.001	0.620	< 0.001
Diagnostic imaging specialists	0.443	< 0.001	0.532	< 0.001	Diagnostic imaging specialists	0.478	< 0.001	0.421	< 0.001
Treatment					Treatment
Shoulder surgeons	0.818	< 0.001	0.537	< 0.001	Shoulder surgeons	0.727	< 0.001	0.651	< 0.001

ISSN: 1754-9493