Impact of primary tumour location on colorectal liver metastases: A systematic review

Table 4 Progression free survival data

Ref.	Year	Median PFS (mo)				5 yr PFS (%)				PFS HR
		L	R	Rectum	P value	L	R	Rectum	P value	L	R	Rectum	P value
Zhou et al[27]	2017					12.5	7.1	11.5	0.012a	0.67	1	0.85	0.012a
de Haas et al[24]	2010					18	16	7	0.009a
Zheng et al[31]	2018	9.2	7.3		0.002a					0.75	1		0.002a
Lionti et al[25]	2018									0.5	1	1
Liao et al[10]	2018					70.9	66.5		0.033a

^aP < 0.05. PFS: Progression free survival; L: Left; R: Right; HR: Hazard ratio.