Comparison of 27-gauge beveled-tip and 25-gauge flat-tip microincision vitrectomy surgery in the treatment of proliferative diabetic retinopathy: a randomized controlled trial

Table 1 Baseline Demographics and Clinical Data of the Two Groups

	27G beveled-tip (n = 25)	25G flat-tip (n = 22)	p value
Age (year)	52.2 ± 12.0	52.6 ± 8.7	0.906*
Male sex	12(48%)	12(54.5%)	0.503†
HbA1c (%)	7.9 ± 1.2	7.7 ± 1.5	0.544*
Duration of DM (year)	10 (10, 20)	10 (10, 20)	0.961ǂ
Grade			0.509†
I II III IV Macula involved	2 (8.0%) 10 (40.0%) 11 (44.0%) 2 (8.0%) 12 (54.5%)	4 (18.2%) 9 (40.9%) 6 (27.3%) 3 (13.6%) 10 (45.5%)	0.861†
Number of retinal detachments	19 (76.0%)	15 (68.2%)	0.550†
Lens status			1.000†
Phakic Pseudophakic Aphakic	23 (92.0%) 2 (8.0%) 0 (0%)	21 (95.5%) 1 (4.5%) 0 (0%)
Preop BCVA (logMAR)	1.53 ± 0.49	1.68 ± 0.66	0.651*
Preop IOP (mmHg)	15.5 ± 3.2	16.4 ± 4.0	0.376*
Number of preop IVI Anti-VEGF treaments	17 (68.0%)	16 (72.7%)	0.724†
Number of preop PRP	2 (8.0%)	3 (13.6%)	0.880†

*Based on t-test; †based on chi-square test/Fisher’s exact test; ǂbased on Mann–Whitney U test.
27G, 27-gauge; 25G, 25-gauge; HbA1c, hemoglobin A1c; preop, preoperative; DM, diabetes mellitus; BCVA, preoperative best-corrected visual acuity; logMAR, logarithm of the minimal angle of resolution; IOP, preoperative intraocular pressure; IVI, intravitreal injection; Anti-VEGF, anti-vascular endothelial growth factor; PRP, panretinal photocoagulation.

ISSN: 1471-2415