Retrospective analysis of risk factors for unplanned anterior vitrectomy during planned cataract ultrasonic phacoemulsification in Chinese adult patients

Table 5 Chi-square test of unplanned anterior vitrectomy in a subgroup of patients with a history of glaucoma during phacoemulsification surgery

Group	Total	Glaucoma filtering surgery history		combined trabeculectomy surgery		posterior pupillary synechiae		lens hardness		iris laser drilling history		zonular abnormalities		POAG^a		PACG^b		old iritis
Group	Total	Y	N	Y	N	Y	N	M	UM	Y	N	Y	N	Y	N	Y	N	Y	N
Unplanned anterior vitrectomy	10	3	7	5	5	1	9	1	9	0	10	6	4	2	8	5	5	1	9
Non-anterior vitrectomy	140	24	113	37	103	9	131	2	138	4	136	1	139	24	116	105	35	2	138
X²		0.32		1.54		0		0.49		-^c		61.01		0		1.84		0.49
Pvalues		0.58		0.22		1		0.48		-		0		1		0.18		0.48

Vitrectomy: unplanned anterior vitrectomy; Non-vitrectomy: eyes without unplanned anterior vitrectomy; a: POAG (Primary Open Angle Glaucoma); b: PACG (primary angle closure glaucoma); c: The result cannot be calculated as there is an expected value in the table that is zero; Y: Yes; N: No; M: mature; UN: unmature

ISSN: 1471-2415