Table 2.

Status two years after diagnosis (follow-up group) or ERM surgery (vitrectomy group) and at the last follow-up visit. Values provided are mean (standard deviation) and range.

	Observation group	Vitrectomy group	p (Mann–Whitney)
24 months
LogMAR visual acuity	0.14 (0.14) Range 0.50 to 0.0	0.16 (0.28) Range 1.30 to 0	0.528
Change in logMAR visual acuity from diagnosis	−0.07 (0.18) Range −0.50 to +0.40	−0.14 (0.29) Range −0.80 to +0.80	<0.001
Central macular thickness (µm)	410 (49) Range 284 to 515	359 (59) Range 153 to 489	<0.001
Last follow-up visit (months)	43.2 (18.5) Range 24 to 105	30.3 (9.9) Range 6 to 48	0.001
LogMAR visual acuity	0.12 (0.15) Range 0.70 to 0.0	0.19 (0.28) Range 1.30 to 0	0.528
Change in logMAR visual acuity from diagnosis	−0.03 (0.13) Range −0.40 to +0.40	−0.13 (0.30) Range −0.80 to 0.80	0.002
Central macular thickness (µm)	407 (49) Range 277 to 500	356 (61) Range 153 to 479	<0.001