Table 3 Comparisons of perfusion densities among groups with a signal strength (SS) from 7 to 10.

	SS 7 (n = 94)	SS 8 (n = 162)	SS 9 (n = 125)	SS 10 (n = 65)	p-value^*	p-value^†	p-value^‡	p-value^§
Total area	0.296 ± 0.063	0.343 ± 0.048	0.384 ± 0.039	0.410 ± 0.028	<0.001	<0.001	<0.001	0.073
Center	0.082 ± 0.057	0.115 ± 0.063	0.146 ± 0.058	0.165 ± 0.056	<0.001	<0.001	<0.001	0.234
InnerAverage	0.260 ± 0.080	0.310 ± 0.070	0.360 ± 0.053	0.385 ± 0.040	<0.001	<0.001	<0.001	0.125
InnerSuperior	0.291 ± 0.085	0.343 ± 0.072	0.386 ± 0.055	0.409 ± 0.037	<0.001	<0.001	<0.001	0.185
InnerNasal	0.259 ± 0.094	0.311 ± 0.080	0.358 ± 0.059	0.381 ± 0.043	<0.001	<0.001	<0.001	0.278
InnerInferior	0.280 ± 0.087	0.322 ± 0.077	0.376 ± 0.059	0.394 ± 0.047	<0.001	<0.001	<0.001	0.530
InnerTemporal	0.212 ± 0.090	0.265 ± 0.088	0.324 ± 0.071	0.356 ± 0.055	<0.001	<0.001	<0.001	0.055
OuterAverage	0.315 ± 0.063	0.362 ± 0.055	0.400 ± 0.037	0.427 ± 0.027	<0.001	<0.001	<0.001	0.091
OuterSuperior	0.345 ± 0.067	0.387 ± 0.049	0.422 ± 0.040	0.444 ± 0.025	<0.001	<0.001	<0.001	0.020
OuterNasal	0.391 ± 0.083	0.435 ± 0.058	0.462 ± 0.039	0.475 ± 0.027	<0.001	<0.001	<0.001	0.703
OuterInferior	0.332 ± 0.068	0.377 ± 0.055	0.416 ± 0.048	0.440 ± 0.039	<0.001	<0.001	<0.001	0.018
OuterTemporal	0.191 ± 0.088	0.246 ± 0.077	0.300 ± 0.065	0.349 ± 0.054	<0.001	<0.001	<0.001	<0.001

Mean ± standard deviation.
^*The p-value was obtained from one-way analysis of variance.
^†The p-value was obtained from the post-hoc test (Bonferroni) between the SS 7 and SS 8 groups.
^‡The p-value was obtained from the post-hoc test (Bonferroni) between the SS 8 and SS 9 groups.
^§The p-value was obtained from the post-hoc test (Bonferroni) between the SS 9 and SS 10 groups.
Boldface numbers indicate statistically significant differences at p < 0.05.

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