Table 1. Characteristics of the 11 studies included in the meta-analysis.

Author	Nation	Year	FS	B value	De	Blind	RS	TI	No. HCCs	Age	Size	TH	TP	FP	FN	TN	W/P	Inter
Chang et al	Taiwan	2014	1.5	0,500	retro	Yes	S	9.4	141	61.9	3.73	1.7	28	18	6	89	W	ADC-Q
	Taiwan	2014	1.5	0,500	retro	Yes	S	9.4	141	61.9	3.73	1.4	36	10	7	88	P	ADC-Q
Woo et al	Korea	2013	3	0,25,50,75,100,200,500,800	retro	Yes	S	17	42	55.5	4.7	1.14	13	6	5	18	P	ADC-Q
Sandrasegaran et al	USA	2012	1.5	0,50,400,500, 800	retro	Yes	B	?	41	55	4.4	0.99	12	4	2	23	W	ADC-Q
	USA	2012	1.5	0, 50	retro	Yes	B	?	41	55	4.4	—	5	4	9	23	W	VA
An et al	Korea	2012	3	0,50,400,800	retro	Yes	S	?	201	57	2.7	—	23	8	14	156	W	VA
	Korea	2012	3	0, 50, 400, 800	retro	Yes	S	?	201	57	2.7	—	33	137	1	30	P	VA
Saito et al	Japan	2012	1.5	100,800	retro	Yes	B	?	42	69	1.83	—	13	2	4	23	W	VA
	Japan	2012	1.5	100, 800	retro	Yes	B	?	42	69	1.83	—	7	20	0	15	P	VA
Nakanishi et al	Japan	2012	1.5	50,1000	retro	Unclear	S	＜30	50	61	5.7	0.8	14	6	4	26	P	ADC-Q
Nishie et al	Japan	2011	1.5	0,500,1000	retro	Unclear	S	＜30	85	65	3.6	0.972	19	16	7	43	P	ADC-Q
Heo et al	Korea	2010	1.5	0,1000	retro	Yes	S	11	27	57	5.6	0.99	7	3	2	15	P	ADC-Q
Muhi et al	Japan	2009	1.5	500,1000	retro	Yes	B	8	86	62.7	2.4	0.92	25	4	14	43	W	ADC-Q
Nasu et al	Japan	2009	1.5	0,500	retro	Unclear	S	18.3	125	64.8	2.9	—	3	8	22	92	W	VA
	Japan	2009	1.5	0,500	retro	Unclear	S	18.3	125	64.8	2.9	—	33	54	6	32	P	VA
Piana et al	France	2011	1.5	0, 500	retro	Yes	B	45	72	63	2.2	—	7	4	28	33	W	VA
	France	2011	1.5	0, 500	retro	Yes	B	45	72	63	2.2	—	8	53	1	10	P	VA

FS, field strength (Tesla); De, design; RS, reference standard (S, surgical specimens; B, biopsy or surgical specimens); TI, time intervals between DWI and reference standard (days); TH, the diagnostic threshold of ADC (×10^﹣3mm²/s); TP, true positive; FP, false positive; FN, false negative; TN, true negative; W, the prediction of well-differentiated HCC; P, the prediction of poorly-differentiated HCC; Inter, image interpretation; ADC-Q, ADC quantification; VA, visual assessment.