Table 4

Statistical correlations between intratumoural lymphatic vessel density and the various clinicopathological parameters of the 52 analysed colorectal carcinomas, investigated using Mann–Whitney and Kruskall–Wallis tests

Parameter	n	Mean rank	95% CI for the median	p Value
Sex
Male	30	25.18	0 to 0	0.388
Female	22	28.29	0 to 7.87	0.388
Age
≤70 years	26	29.53	0 to 8.8	0.088
> 70 years	26	23.41	0 to 0	0.088
Site
Left colon	36	28.65	0 to 5.92	0.0703
Right colon	16	21.65	0 to 0	0.0703
Grade
1	14	27.54		0.884
2	35	25.91	NA^*
3	3	28.5
T
T1	5	18	NA^†	0.1202
T2	47	27.4	0 to 1.51	0.1202
Vascular endothelial growth factor expression
Low (0–50% positive cells)	27	27	0 to 2.42	0.77
High (51–100% positive cells)	25	25.96	0 to 3.78	0.77
Disease progression
Not	23	24.84	0 to 0	0.409
Yes	29	27.81	0 to 0 4.69	0.409

↵* Not available for comparison of three groups.
↵† Not available for a small sample.