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

Table 4

Effect of treatment on IOP for each patient group, by age. IOP drop is from preop to last followup.

	CycloYAG			Cyclodiode			Tube			ANOVA
	<40	>40	𝑃	<40	>40	𝑃	<40	>40	𝑃	𝑃<40	𝑃>40
Age	24.2	60.7	—	26.9	62.4	—	26.6	57.0	—	NS	NS
Preop IOP	38.8	38.5	NS	30.9	34.0	NS	38.0	43.8	0.04	NS	0.0001*
12 M IOP	27.2	19.4	0.02	24.3	17.7	0.04	16.5	15.4	NS	0.005^§	NS
Final IOP	27.2	19.6	0.02	23.3	17.2	0.04	16.8	16.0	NS	0.01^§	NS
IOP drop	11.6	18.9	0.03	10.8	13.7	NS	21.2	27.8	0.06	0.007^□	0.0001^□
% IOP drop	29.4	49.2	0.02	27.5	40.7	NS	54.8	61.0	NS	0.007^□	0.001^‡

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.