Immunohistochemical expression of epidermal growth factor receptor (EGFR) in oral squamous cell carcinoma in relation to proliferation, apoptosis, angiogenesis and lymphangiogenesis

Table 4 Correlation matrix

	PCNA	P53	EGFR extent score	EGFR Intensity score	VEGF	D2-40 positive tumor cells	Intratumoral LVD	Peritumoral LVD	Total LVD
P53	0.34(*)
EGFR extent score	-0.19	0.16
EGFR Intensity score	0.03	0.01	0.25
VEGF	0.07	0.11	0.18	0.25
D2-40 positive tumor cells	-0.01	0.28	0.1	0.07	-0.09
Intratumoral LVD	0.07	0.26	0.35(*)	0.33(*)	0.08	0.39(*)
Peritumoral LVD	0.01	-0.01	0.02	0.36(*)	0.2	0.22	0.62(*)
Total LVD	0.07	0.11	0.18	0.36(*)	0.15	0.32(*)	0.85(*)	0.92(*)
Tumor staging	-0.06	0.13	-0.09	0.09	-0.05	-0.26	-0.09	0.04	-0.04
Tumor grading	-0.08	0.03	-0.01	0.05	0.09	0.15	0.2	0.43(*)	0.32(*)
Tumor size	-0.06	0.01	-0.18	-0.13	-0.03	-0.32(*)	-0.05	0.1	0.04
Lymph node staging	-0.02	0.22	0.05	0.25	0.03	-0.08	-0.01	0.12	0.06
Age	0.31	0.31	0.07	0.03	-0.2	0.08	-0.04	-0.28	-0.15