Table 4.

Causes of additional surgery after PPV

	TA-assisted PPV (total 391 eyes): n (%)	Conventional PPV (total 383 eyes) : n (%)	P-value*
Silicone removal	11 (2.8%)	7 (1.8%)	0.36
Retinal detachment	8 (2.0%)	9 (2.3%)	0.77
Vitreous hemorrhage	6 (1.5%)	12 (3.1%)	0.14
Filtering surgery	15 (3.8%)	7 (1.8%)	0.10
Others	7 (1.8%)	6 (1.6%)	0.81
Total	37 (9.5%)✝	32 (8.6%)✝✝	0.68

TA; triamcinolone acetonide: PPV; pars plana vitrectomy: * Chi-square test with the Yates’ correction: ^✝ Ten eyes received multiple additional surgeries: ^✝✝ Seven eyes received multiple additional surgeries.