Laparoscopic liver resection for colorectal liver metastases — short- and long-term outcomes: A systematic review

Table 2 Study details of studies concerning prognostic factors

Ref.	Year	Country	Study design	Specific for LLR?	Number of patients	Age in yr
Langella et al[52]	2015	Italy	Retrosp., case-control	No	74	-
Nomi et al[27]	2016	France, Japan	Retrosp., case-matched	Yes	120	61 (26-89)
Postriganova et al[28]	2014	Norway	Retrosp.	Yes	155	66 (35-84)
Tabchouri et al[70]	2018	France	Retrosp.	Yes	302	64.4 ± 11.1
Tohme et al[55]	2015	United States	Retrosp., case-matched	No	132	-
Topal et al[86]	2012	Belgium	Retrosp.	No	274	-
Yue et al[39]	2018	China	Retrosp.	Yes	241	-
Zeng et al[56]	2016	China	Retrosp., PSM	No	158	-
Montalti et al[33]	2015	Belgium	Retrosp.	Yes	114	66.4 ± 0.89
Cervantes et al[98]	2019	France	Retrosp.	Yes	227	-
De Haas et al[99]	2009	The Netherlands	Retrosp.	No	796	-
Jones et al[100]	2014	United Kingdom	Retrosp. cohort	No, only open	73	69.1 (59.8-73.9)1
Ratti et al[101]	2019	France, Italy	Retrosp., PSM	Yes	146	-
Nieropet al[102]	2019	The Netherlands, Belgium, United States	Retrosp.	No	1302	-

¹Interquartile range.

Numbers are presented as median (range) or mean ± SD unless otherwise indicated. LLR: laparoscopic liver resection; PSM: propensity score-matched; Retrosp.: retrospective.