Effects of Preoperative Intravenous Clonidine in Patients Undergoing Cataract Surgery: A Double-Blind, Randomized Trial

Table 2

Intensity of pain, mean (SD).

Time points	Clonidine; ()	Placebo; ()
Control	0.4 (1.0)	0.2 (0.7)	0.77
5 min	0.3 (0.9)	0.2 (0.7)	0.79
15 min	0.3 (0.9)	0.2 (0.7)	0.79
Blepharostat	0.3 (0.9)	0.2 (0.7)	0.79
Incision of the cornea	0.3 (0.9)	0.2 (0.5)	0.99
Capsulorhexis	0.5 (1.1)	0.9 (1.3)	0.43
Phacoemulsification	1.4 (1.6)	3.9 (3.2)	0.02
Irrigation-aspiration	1.4 (2.0)	3.1 (2.7)	0.04
Lens implantation	1.7 (2.0)	3.6 (2.4)	0.01
End	1.1 (1.7)	1.8 (1.8)	0.20

Mann-Whitney test.