Conbercept combined with laser photocoagulation in the treatment of diabetic macular edema and its influence on intraocular cytokines

Table 5 Levels of vascular endothelial growth factor before and after treatment

Group	Number of cases	VEGF (ng/mL)
		Prior treatment	One month of treatment	Three months of treatment	Treatment for 6 mo
Control group	65	423.73 ± 76.35	336.73 ± 65.281	170.30 ± 41.321,2	106.32 ± 10.711,2,3
Observation group	65	424.32 ± 77.31	301.62 ± 63.781	110.32 ± 36.721,2	66.79 ± 10.211,2,3
t value		-0.151	3.512	8.707	21.818
P value		0.880	< 0.001	< 0.001	< 0.001

¹Indicates the intra-group comparison with that before treatment, P < 0.05.

²Indicates that compared with 1 month after treatment, P < 0.05.

³Indicates intra-group comparison with 3-mo treatment, P < 0.05.

VEGF: Vascular endothelial growth factor.