Periportal thickening on magnetic resonance imaging for hepatic fibrosis in infantile cholestasis

Table 2 Comparison and correlation analyses for fibrosis grading

	Age (d)	APRI	PT (mm)	SR
Hepatic fibrosis group comparison
F0 (n = 32)	40.8 ± 34.8	1.12 ± 1.63	3.1 ± 1.1	0.89 ± 0.15
F1 (n = 10)	60.6 ± 44.0	0.46 ± 0.38	3.3 ± 1.3	0.94 ± 0.20
F2 (n = 66)	52.3 ± 31.0	1.14 ± 1.23	5.2 ± 1.4	1.01 ± 0.17
F3 (n = 37)	71.9 ± 28.6	2.00 ± 2.27	5.9 ± 1.6	1.12 ± 0.20
F4 (n = 10)	89.7 ± 26.6	1.52 ± 0.55	5.7 ± 1.6	1.21 ± 0.17
P value	< 0.001	0.026	< 0.001	< 0.001
Correlation analysis
Overall correlation
τ	0.313	0.326	0.448	0.361
P value	< 0.001	< 0.001	< 0.001	< 0.001
Partial correlation with adjusting age
τ		0.071	0.518	0.340
P value		0.405	< 0.001	< 0.001

P values from analysis of variance for group comparisons and Kendall’s tau for correlation analyses. APRI: Aspartate transaminase to platelet ratio index; PT: Periportal thickening, SR: Normalized spleen size ratio.