Impact of small-for-size liver grafts on medium-term and long-term graft survival in living donor liver transplantation: A meta-analysis

Table 1 Characteristics of included studies

Study	Country	Definition of SFSG	Number of patient in SFSG group	Number of patient in NFSG group	Incidence of SFSS (%)	Short-term mortality in SFSG group	Medium-term mortality in SFSG group (OR, 95%CI)	Long-term mortality in SFSG group (OR, 95%CI)
Ikegami et al[24], (2008)	Japan	< 35% GV/SLV	33	87	0	12.5% (1 yr)	2.46 (0.88-6.93)	3.25 (1.29-8.18)
Moon et al[25], (2010)	Korea	< 0.8% GRWR	35	392	5.7	-	1.12 (0.45-2.82)	1.33 (0.60-2.95)
Au et al[22], (2015)	Hong Kong	< 35% GV/SLV	21	212	-	-	1.14 (0.32-4.14)	1.61 (0.51-5.15)
Ikegami et al[23], (2016)	Japan	< 35% GV/SLV	88	119	11.4	-	-	0.69 (0.28-1.72)
Lee et al[21], (2014)	Korea	< 0.8% GRWR	50	267	8	2% (1 yr)	1.61 (0.72-3.63)	-
Liu et al[20], (2015)	China	< 0.8% GRWR	65	181	11	7.7% (30 d)	1.79 (0.93-3.43)	1.23 (0.65-2.34)
Selzner et al[26], (2009)	Canada	< 0.8% GRWR	22	249	9	4.5% (30 d)	1.36 (0.43-4.25)	0.82 (0.27-2.60)

GV: Graft volume; SLV: Standard liver volume; GRWR: Graft-to-recipient weight ratio; SFSG: Small-for-size grafts; NFSG: Normal-for-size grafts; OR: Odds ratio; CI: Confidence interval.

Table 2 Newcastle-Ottawa Score for the included studies

Study	Selection	Comparability	Outcome	Total
Liu et al[20], (2015)	4	1	1	6
Lee et al[21], (2014)	4	2	1	7
Au et al[22], (2015)	4	1	3	8
Ikegami et al[23], (2016)	4	2	2	8
Ikegami et al[24], (2008)	4	2	2	8
Moon et al[25], (2010)	4	2	2	8
Selzner et al[26], (2009)	4	1	2	7