Poorly differentiated cluster grade-a vital predictor for lymph node metastasis and oncological outcomes in patients with T1 colorectal cancer: a retrospective study

Table 5 Results of backward regression

	Variables	Log likelihood of models	Changes of -2 log likelihood	P
Step 1	PDC grade	− 29.753	22.248	< 0.001
	TB grade	− 21.472	5.686	0.058
	Depth of submucosal invasion	− 21.659	6.06	0.014
	Stratification of submucosal invasion	− 20.455	3.651	0.056
	PNI	− 20.938	4.618	0.032
	LVI	− 21.766	6.273	0.012

PDC poorly differentiated cluster, TB tumor budding, PNI perineural invasion, LVI lymphvascular invasion

ISSN: 1471-230X