Table 2.

Endothelial cell count before and after trabeculectomy and EX-PRESS

	Trabeculectomy (cells/mm2)	EX-PRESS (cells/mm2)
Baseline	2505 ± 280	2377 ± 389
6 months	2398 ± 275	2267 ± 409
P value	< 0.001	0.007
12 months	2349 ± 323	2292 ± 452
P value	< 0.001	0.043
18 months	2293 ± 325	2379 ± 375
P value	< 0.001	0.32
24 months	2277 ± 385	2317 ± 449
P value	0.003	0.27