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Correlation of clinical severity grades of acute hepatic encephalopathy with initial MRI severity and PAL^a
Criteria West Haven Grade Outcome FLAIR Severity DWI Severity PAL
West Haven Grade — 0.533 (.016) −0.089 (.708) −0.026 (.912) 0.400 (.090)
Outcome 0.533 (.016) — 0.592 (.006) 0.487 (.029) 0.691 (.001)^{^b}
FLAIR −0.089 (.708) 0.592 (.006) — 0.760 (.0001)^{^b} 0.680 (.001)^{^b}
DWI −0.026 (.912) 0.487 (.029) 0.760 (.0001)^{^b} — 0.690 (.001)^{^b}
PAL 0.400 (.090) 0.691 (.001)^{^b} 0.680 (.001)^{^b} 0.690 (.001)^{^b} —
a P values are in parentheses; –, negative correlation.
b Significant correlations at P < .005.

Criteria	West Haven Grade	Outcome	FLAIR Severity	DWI Severity	PAL
West Haven Grade	—	0.533 (.016)	−0.089 (.708)	−0.026 (.912)	0.400 (.090)
Outcome	0.533 (.016)	—	0.592 (.006)	0.487 (.029)	0.691 (.001)^{^b}
FLAIR	−0.089 (.708)	0.592 (.006)	—	0.760 (.0001)^{^b}	0.680 (.001)^{^b}
DWI	−0.026 (.912)	0.487 (.029)	0.760 (.0001)^{^b}	—	0.690 (.001)^{^b}
PAL	0.400 (.090)	0.691 (.001)^{^b}	0.680 (.001)^{^b}	0.690 (.001)^{^b}	—