Table 2 Comparison of preoperative and postoperative parameters of topographic features and macular thickness
From: Quantitative analysis of macular contraction in idiopathic epiretinal membrane
Parameters | Values | Median (q25–q75) | P-value | |
|---|---|---|---|---|
Vessel segment length in area | ||||
 Preoperative |  |  |  |  |
|  | Superior | 1522.2 ± 233.5 | 1558.2 (1428.2–1622.2) | — |
|  | Inferior | 1401.6 ± 378.9 | 1363.0 (1250.5–1563.4) | — |
|  | Nasal | 1305.7 ± 250.2 | 1375.7 (1181.3–1435.2) | — |
|  | Temporal | 1515.6 ± 344.9 | 1529.6 (1358.8–1704.6) | — |
 Postoperative |  |  |  |  |
|  | Superior | 1175.6 ± 239.3 | 1142.7 (1063.1–1371.5) | 0.039a* |
|  | Inferior | 1043.5 ± 226.7 | 1095.4 (943.5–1155.6) | 0.013a* |
|  | Nasal | 1049.0 ± 205.9 | 1069.5 (1026.5–1163.5) | 0.082a |
|  | Temporal | 630.1 ± 179.0 | 654.1 (533.7–712.1) | 0.001a* |
Length from the foveal center to the vessel branching point | ||||
 Preoperative |  |  |  |  |
|  | Superior | 9173.9 ± 1687.8 | 9339.4 (7837.4–10288.7) | — |
|  | Inferior | 9730.7 ± 1738.3 | 9880.2 (9669.0–10703.0) | — |
 Postoperative |  |  |  |  |
|  | Superior | 9868.8 ± 1614.7 | 9819.5 (8669.2–10662.6) | 0.006a* |
|  | Inferior | 10366.9 ± 1773.9 | 10628.3 (9661.0–11729.9) | 0.005a* |
Macular thickness | ||||
 Preoperative |  |  |  |  |
|  | Superior | 340.5 ± 50.5 | — | — |
|  | Inferior | 341.6 ± 78.5 | — | — |
|  | Nasal | 375.5 ± 57.2 | — | — |
|  | Temporal | 373.9 ± 64.9 | — | — |
|  | Central | 368.3 ± 102.6 | — | — |
 Postoperative |  |  |  |  |
|  | Superior | 290.0 ± 41.2 | — | 0.001a* |
|  | Inferior | 279.0 ± 39.2 | — | 0.050a* |
|  | Nasal | 324.1 ± 41.3 | — | 0.126a |
|  | Temporal | 286.8 ± 52.5 | — | 0.007a* |
|  | Central | 302.5 ± 78.0 | — | 0.001a* |