. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: AJR Am J Roentgenol. 2017 Oct 18;210(1):166–174. doi: 10.2214/AJR.17.18446

TABLE 1.

Quantitative Liver MRI Measurements and Liver Histopathologic Scores for 69 Pediatric and Young Adult Patients With Nonalcoholic Fatty Liver Disease (NAFLD)

Variable	Mean	SD	Range

MRI quantitative measurements
Volume (mL)	2379.0	696.9	812–4693
Stiffness (kPa)^a	2.7	0.6	1.5–5.5
Fat fraction (%)^b	14.5	10.3	0.7–39.0
Histopathologic scores
Steatosis (0–3)	2.0	0.9	0–3
Lobular inflammation (0–3)	1.2	0.7	0–3
Portal inflammation (0–2)	0.8	0.6	0–2
Hepatocyte ballooning (0–2)	0.7	0.6	0–2
Fibrosis stage (0–4)	1.0	1.1	0–4
NAFLD score (0–8)	3.8	1.6	0–7

Liver stiffness was measured in only 68 patients.

MRI examinations performed between January and December 2012 did not routinely include a liver fat fraction measurement; thus, fat fraction was measured in only 55 patients.