Table 4. Comparisons of Tissue VEGF levels at Day 7 between groups.

Group	Tissue VEGF at Day 7(mean±SD)pg/mg protein	VEGF expression at day 7(10 sections/Tumor)			Positive Rate(%)
		−	±	+
1(n = 4)	30.05±7.12a , b , c	32	5	3	8/40 (20%)g , h , i
2(n = 4)	41.22±9.25d , e	28	5	7	12/40 (30%)j , k
3(n = 4)	97.64±17.31f	28	5	7	34/40 (85%)l
4(n = 4)	60.85±11.16	18	16	6	22/40 (55%)

Abbreviations: −(negative); ±(weakly positive);+(positive).

Mann-Whitney U Test:

^a:G1 vs. G2 p = 0.003;

^b: G1 vs. G3 p = 0.000;

^c: G1 vs. G4 p = 0.000;

^d:G2 vs. G3 p = 0.000;

^e: G2 vs. G4 p = 0.000;

^f: G3 vs. G4 p = 0.000.

Chi-square test:

^g:G1 vs. G2 p = NS;

^h: G1 vs. G3 p = 0.000;

ⁱ: G1 vs. G4 p = 0.0027;

^j:G2 vs. G3 p = 0.000;

^k: G2 vs. G4 p = 0.0418;

^l: G3 vs. G4 p = 0.0073.