. 2017 Feb 15;12(2):e0172094. doi: 10.1371/journal.pone.0172094

Table 6. Comparison of the three RS-fMRI indexes.

	Sensitivity		Specificity		PPV		NPV
	χ²	P	χ²	P	χ²	P	χ²	P
ReHo vs. ALFF	2.10	0.1496	/	1^b	0.07	0.7875^a	/	1.0000^b
ReHo vs. fALFF	6.77	0.0093	/	1^b	0	0.9899^a	0.22	0.6391^a
ALFF vs. fALFF	1.40	0.2370	/	1^b	/	0.5742^b	0.08	0.7808^a

RS-fMRI, resting-state functional magnetic resonance imaging; PPV, positive predictive value; NPV, negative predictive value; ReHo, regional homogeneity; ALFF, amplitude of low-frequency fluctuations; fALFF, fractional ALFF.

^a Yates correlation,

^b Fisher exact test