Demographic and preoperative ophthalmic data of the study participants
| Characteristics | Group 1 | Group 2 | p Value |
|---|---|---|---|
| No. of patients (eyes) | 52 (52) | 46 (46) | |
| Gender (female/male) | 24/28 | 22/24 | 0.869* |
| Age (years) | 48.70 (10.21) | 53.11 (13.52) | 0.31† |
| Refraction (dioptres) | |||
| Mean (SD) | −21.20 (4.05) | −23.62 (4.72) | 0.32† |
| Median (p25; p75) | 21.50 (−19.50; −25.50) | −23 (−20; −25) | |
| (min to max) | (−17 to −30) | (−18 to −29) | |
| Axial length (mm) | 0.270† | ||
| Mean (SD) | 32.73 (2.42) | 33.98 (2.35) | |
| Median (p25; p75) | 33.53 (31.00; 34.00) | 33.05 (31.50; 34.05) | |
| (min to max) | 30.10 to 36.00 | 30.00 to 37.50 | |
| BCVA (LogMAR) | |||
| Mean (SD) | 1.67 (0.49) | 1.61 (0.53) | 0.404† |
| Median (p25; p75) | 1.602 (1.00; 1.903) | 1.602 (0.80; 1.903) | |
| (min to max) | 0.70 to 2.30 | 0.50 to 2.30 | |
| Retinoschisis-like feature, n (%) | 25 (48.10%) | 26 (56.50%) | 0.403* |
| Lens status, n (%) | 0.194* | ||
| Aphakic | 0 | 0 | |
| Phakic | 26 (50%) | 29 (63%) | |
| Pseudophakic | 26 (50%) | 17 (37%) | |
| IOP (mm Hg) | |||
| Mean (SD) | 14.60 (3.21) | 15.12 (3.30) | 0.306† |
| Median (p25; p75) | 14.9 (13.8; 16.3) | 15.2 (13.5; 16.1) | |
| (min to max) | 12.1 to 17.5 | 13.0 to 17.5 | |
| Symptom duration (months) | |||
| Mean (SD) | 4.78±3.32 | 6.10±4.21 | 0.672† |
| Median (p25; p75) | 4.5 (2.5; 6.0) | 5.5 (3.5; 7.0) | |
| (min to max) | 0.5 to 10.5 | 1 to 12 | |
| PVD presence, n (%) | 11 (21.15%) | 7 (15.22%) | 0.449* |
| PVR (posterior) | |||
| Grade B | 44 (88.46%) | 40 (91.30%) | 0.741* |
| Grade C | 8 (11.54%) | 6 (8.70%) | |
| Grades of chorioretinal degeneration§, n (%) | 0.609* | ||
| Grade M4 | 23 (44.23%) | 18 (39.13%) | |
| Grade M5 | 29 (55.77%) | 28 (60.87%) | |
| Grades of posterior staphyloma¶, n (%) | |||
| Grade 4 | 52 (100%) | 46 (100%) | |
| Area of retinal detachment | 0.418* | ||
| Within staphyloma | 24 (46.15%) | 25 (54.35%) | |
| Beyond staphyloma | 28 (53.85) | 21 (45.65%) | |
Group 1=treated with PPV and ILM peeling; group 2=treated with PPV and ILM peeling combined with macular buckle.
*χ2 test.
†Mann-Whitney U test.
§By Avila et al.22
¶By Steidl et al.23
BCVA, best-corrected visual acuity; ILM, internal limiting membrane; IOP, Intraocular pressure; LogMAR, logarithm of minimum angle of resolution; PPV, pars plana vitrectomy; PVD, posterior vitreous detachment; PVR, proliferative vitreous retinopathy.