Table 2.

Changes of ERG b-wave in suction 20 seconds, 3 minutes, and normal control groups (μv).

	Item
Group	Recovery	Recovery	Recovery	Recovery	Recovery	Recovery	Recovery	Recovery	Recovery
	10 minutes	20 minutes	30 minutes	1 hour	1 day	7 days	14 days	28 days	56 days
Suction 20	112.01*	94.51*	95.81	100.21	97.16	90.34	96.1	94.12	98.47
seconds groups	± 11.08	± 14.43	± 12.30	± 10.48	± 14.27	± 14.30	± 17.55	± 15.41	± 10.22
Suction 3	55.89*	67.73*	80.21∗#	89.6#	92.6#	89.8#	99.61	96.35	101.33
minutes groups	± 9.46	± 16.42	± 14.23	± 7.10	± 11.01	± 15.64	± 18.52	± 10.32	± 15.64
Control	84.96	86.59	98.16	92.12	86.45	88.75	98.47	113.28	105.67
groups	± 13.48	± 15.25	± 12.56	± 21.01	± 18.89	± 12.33	± 10.22	± 13.48	± 20.06

Note: Compared with normal control group, P > .05, *P < .05; compared with suction 20 seconds group, ^# P < .05.