A Comparison between Tube Surgery, ND:YAG Laser and Diode Laser Cyclophotocoagulation in the Management of Refractory Glaucoma

Table 3

Clinical characteristics of the three groups of patients (standard deviation).

	CycloYAG	Cyclodiode	Tube	𝑃
Male : female	19 : 26	21 : 24	27 : 18	0.02^□
Preoperatively
Mean duration of glaucoma (months)	97.7 (72.8)	116.0 (102.9)	102.2 (90.1)	NS
Mean preop IOP	38.6 (8.7)	32.0 (9.5)	41.3 (9.7)	<0.00005*
Postoperatively
Mean duration of followup (months)	16.6 (6.4)	21.5 (8.7)	38.2 (16.4)	<0.0005^□
Mean final postop IOP	22.1 (9.9)	19.3 (8.5)	16.4 (6.6)	<0.007^§
Mean IOP drop	16.6 (9.5)	12.7 (11.4)	25.0 (11.9)	<0.00005^□
Mean % IOP drop	42.8 (21.7)	36.0 (30.1)	58.4 (18.2)	<0.0001^□

IOP: intraocular pressure (mmHg), NS: no statistically significant difference, □tube group differs statistically significantly from both cycloYAG group and cyclodiode group, *cyclodiode group differs statistically significantly from both tube group and cycloYAG group, §statistically significant difference between tube group and cycloYAG group.