Same Surgeon: Different Centre Equals Differing Lymph Node Harvest following Colorectal Cancer Resection

Table 3

Analysis of factors that may have influenced overall LN retrieval.

Variable			Number	Median LN harvest	P value
Unit		Unit 1	110	13	𝑃<.001^∗
		Unit 2	103	22
Operation type		Right colon	80	16	𝑃=.761^∗∗
		Left colon	48	17
		Rectal	85	16
		Rectal with radiotherapy	40	16	𝑃=.996^∗
		Rectal without radiotherapy	45	19
Operative urgency		Elective	188	16	𝑃=.299^∗
		Emergency	25	15
Final Dukes’ stage		A	45	12	𝑃=.158^∗∗
		B	72	16
		C	96	17
T stage		CR	7	7	𝑃=.001^∗∗
		1	14	9
		2	40	18
		3	114	16
		4	38	17
Reporting Pathologist	Unit 1	1	31	15	𝑃<.001^∗∗
		2	39	14
		3	40	11
Reporting Pathologist	Unit 2	4	37	33	𝑃<.001^∗∗
		5	32	15
		6	12	19
		7	8	23
		8	6	25
		9***	8	24
Clinical presentation		Symptomatic	205	16	𝑃=.195
		Screen detected (all unit 2)	8	19

*Mann-Whitney 𝑈 test. **Kruskal- Wallis 𝐻 test. ***Pooled results of 4 pathologists each reporting less than 5 cases.