Differential Diagnosis Tool for Parkinsonian Syndrome Using Multiple Structural Brain Measures

Table 5

The correct classification rates of each combination of independent variables.

(a) Two independent variables

	4th Vent_vol	Cerebellum_vol	MCP	SCP	Pons	SN	ST	PM
4th Vent_vol		0.514	0.583	0.611	0.583	0.556	0.819	0.431
Cerebellum_vol			0.528	0.556	0.514	0.458	0.722	0.458
MCP				0.708	0.472	0.667	0.833	0.528
SCP					0.681	0.528	0.736	0.542
Pons						0.667	0.847	0.514
SN							0.722	0.583
ST								0.653
PM

4th Vent_vol: fourth ventricle volume; cerebellum_vol: cerebellum volume; MCP: middle cerebellar peduncle; SCP: superior cerebellar peduncle; SN: substantia nigra; ST: superior temporal region; PM: primary motor region.

(b) Three independent variables

								Accuracy
4th Vent_vol	Cerebellum_vol	MCP						0.556
4th Vent_vol	Cerebellum_vol		SCP					0.681
4th Vent_vol	Cerebellum_vol			Pons				0.569
4th Vent_vol	Cerebellum_vol				SN			0.583
4th Vent_vol	Cerebellum_vol					ST		0.861
4th Vent_vol	Cerebellum_vol						PM	0.583
4th Vent_vol		MCP	SCP					0.708
4th Vent_vol		MCP		Pons				0.542
4th Vent_vol		MCP			SN			0.653
4th Vent_vol		MCP				ST		0.889
4th Vent_vol		MCP					PM	0.569
4th Vent_vol			SCP	Pons				0.722
4th Vent_vol			SCP		SN			0.625
4th Vent_vol			SCP			ST		0.833
4th Vent_vol			SCP				PM	0.681
4th Vent_vol				Pons	SN			0.681
4th Vent_vol				Pons		ST		0.889
4th Vent_vol				Pons			PM	0.597
4th Vent_vol					SN	ST		0.875
4th Vent_vol					SN		PM	0.611
4th Vent_vol						ST	PM	0.861
	Cerebellum_vol	MCP	SCP					0.681
	Cerebellum_vol	MCP		Pons				0.486
	Cerebellum_vol	MCP			SN			0.639
	Cerebellum_vol	MCP				ST		0.833
	Cerebellum_vol	MCP					PM	0.528
	Cerebellum_vol		SCP	Pons				0.625
	Cerebellum_vol		SCP		SN			0.583
	Cerebellum_vol		SCP			ST		0.764
	Cerebellum_vol		SCP				PM	0.583
	Cerebellum_vol			Pons	SN			0.653
	Cerebellum_vol			Pons		ST		0.833
	Cerebellum_vol			Pons			PM	0.528
	Cerebellum_vol				SN	ST		0.792
	Cerebellum_vol				SN		PM	0.583
	Cerebellum_vol					ST	PM	0.792
		MCP	SCP	Pons				0.681
		MCP	SCP		SN			0.694
		MCP	SCP			ST		0.819
		MCP	SCP				PM	0.681
		MCP		Pons	SN			0.694
		MCP		Pons		ST		0.806
		MCP		Pons			PM	0.486
		MCP			SN	ST		0.833
		MCP			SN		PM	0.625
		MCP				ST	PM	0.819
			SCP	Pons	SN			0.667
			SCP	Pons		ST		0.819
			SCP	Pons			PM	0.681
			SCP		SN	ST		0.792
			SCP		SN		PM	0.611
			SCP			ST	PM	0.722
				Pons	SN	ST		0.819
				Pons	SN		PM	0.694
				Pons		ST	PM	0.819
					SN	ST	PM	0.764