Table 1.

Patients' Baseline Characteristics

	Technique of Anesthesia Administration
	RB (N = 30)	Sub-Tenon (N = 30)	Canthal (N = 30)
Sex,* n (%)
Male	14 (32.0)	13 (34.0)	13 (34.0)
Female	16 (35.0)	17 (32.5)	17 (32.5)
Age,† years
Mean ± SD	68.7 ± 8.9	68.6 ± 7.8	66.8 ± 8.7
Range	51–88	51–88	51–88
Indication for PPV, n (%)
Epimacular membrane	18 (60.0)	15 (50.0)	21 (70.0)
Macular hole	8 (26.7)	12 (40.0)	9 (30.0
Vitreous hemorrage	4 (13.3)	3 (10.0)	0
Duration of surgery, minutes
Mean	42.6 ± 7.1	42.2 ± 8.8	43.3 ± 8.5
Range	31–56	30–58	32–60

The patients were matched by sex* (chi-square: P = 0.9560) and age† (one-way analysis of variance: P = 0.5999) to RB (Group 1, n = 30), STA (Group 2, n = 30), and MCEA (Group 3, n = 30).

PPV, pars plana vitrectomy.