Incidence and Risk Factors of Iatrogenic Retinal Breaks: 20-Gauge versus 25-Gauge Vitrectomy for Idiopathic Macular Hole Repair

Table 2

Comparison of the incidence of iatrogenic retinal breaks with or without preoperative posterior vitreous detachment and with or without lattice degeneration.

	20 gauge (130 eyes)	25 gauge (55 eyes)	value
PVD (+)	6/41 (14.6%)	3/15 (20.0%)	NS
PVD (−)	42/89 (47.2%)	4/40 (10.0%)	0.0001
value	0.0007	NS
LD (+)	15/19 (78.9%)	3/4 (75.0%)	NS
LD (−)	33/111 (29.7%)	4/51 (7.8%)	0.021
value	0.0001	0.002

LD: lattice degeneration (+ present; − absent); PVD: posterior vitreous detachment (+ present; − absent); Fisher’s exact probability test: comparison between surgery types within each pathological condition; comparison within surgery type, between eyes with and without other pathological conditions; NS: not significant.