Table 2.

Three indicators of the eZIS in the early-onset and late-onset groups

	Early-onset group (n = 16)	Late-onset group (n = 18)	p value
Severity	2.50 (0.84)	1.42 (0.49)	0.000
Extent	52.3 (22.3)	20.4 (15.6)	0.000
Ratio	4.05 (l.57)	2.68 (1.96)	0.033
Abnormalities in all indicators	15/16 (93.8)	9/18 (50.0)	0.008

Values are presented as mean (SD) or n (%). Differences between groups were assessed using Student's t test (severity, extent, and ratio) and Fisher's exact test (rate of patients with abnormalities in all indicators). eZIS, easy Z-score imaging system.