Table 2.

Multivariate regression analyses of potential risk factors for the development of iatrogenic retinal breaks, postoperative retinal detachment and cataract.

		Retinal break formation		Postoperative RD development		Cataract formation
	Categorical (C) (referent category first) or scaled (S)	OR (%95 CI)	p value	OR (%95 CI)	p value	OR (%95 CI)	p value
Patient agea	S (years)	1.02 (0.98–1.06)	0.273	0.94 (0.88–1)	0.060	0.98 (0.96–0.99)	0.044
Patient sexa	C (female, male)	2.74 (1.07–7.03)	0.036	1.54 (0.31–7.66)	0.598	1.63 (0.99–2.68)	0.054
Refractive status	C (myopia, hyperopia)	NA		0.54 (0.17–1.67)	0.286	NA
Lens status	C (phakic, pseudophakic)	1.16 (0.26–5.19)	0.848	1.92 (0.26–14.38)	0.525	NA
Quality of vitrectomy	C (complete, core, subtotal)	0.05 (0.01–0.46)	0.009	NA		1.60 (0.74–3.45)	0.230
		0.23 (0.05–1.06)	0.059			0.78 (0.39–1.55)	0.476
Gauge	S (20, 23, 25 or smaller)	2.13 (0.70–6.46)	0.181	0.34 (0.05–2.42)	0.281	0.66 (0.28–1.52)	0.329
		0.27 (0.02–3.38)	0.313	0.09 (0.004–1.65)	0.103	1.1 (0.45–2.61)	0.855
Cutting speed	S (<1500, 1500–4000, >4000)	0.03 (0.003–0.29)	0.002	0.15 (0.01–2.33)	0.176	1.98 (0.97–4.07)	0.063
		0.12 (0.02–0.76)	0.025	1.9 (0.19–18.5)	0.578	1.34 (0.54–3.33)	0.526
Combined cataract extraction	C (absent, present)	0.90 (0.19–4.19)	0.898	NA		NA
Intraoperative complication	C (absent, present)	NA		1.91 (0.34–10.7)	0.460	NA

OR odds ratio, CI confidence interval, NA not applicable to be included in the regression model.

^aForced demographic covariates.