Table 2.
Mean Macular Thickness and Volume by Age Group
| Age Groups, Tertile (Years) | ||||
|---|---|---|---|---|
| Tertile 1 69–78 | Tertile 2 78–83 | Tertile 3 83–101 | P Value | |
| Total retina, number of eyes | 330 | 321 | 255 | |
| Macular thickness (µm) | ||||
| Central circle | 278 (33) | 277 (28) | 277 (42) | 0.89 |
| Inner ring | 330 (20) | 326 (18) | 323 (23) | 0.001 |
| Outer ring | 284 (16) | 280 (15) | 280 (15) | 0.004 |
| Macular volume (mm3) | ||||
| ETDRS grid | 8.3 (0.5) | 8.2 (0.4) | 8.2 (0.5) | 0.002 |
| Inner retinal layers, number of eyes | 312 | 307 | 236 | |
| Macular thickness (µm) | ||||
| Central circle | 190 (28) | 188 (23) | 187 (26) | 0.25 |
| Inner ring | 249 (19) | 245 (17) | 241 (19) | <0.0001 |
| Outer ring | 206 (15) | 203 (14) | 201 (14) | 0.001 |
| Macular volume (mm3) | ||||
| ETDRS grid | 6.1 (0.4) | 6.0 (0.4) | 5.9 (0.4) | <0.0001 |
| Outer Retinal Layers, number of eyes | 330 | 321 | 255 | |
| Macular thickness (µm) | ||||
| Central circle | 86 (11) | 86 (12) | 86 (20) | 0.40 |
| Inner ring | 80 (5) | 79 (3) | 80 (7) | 0.98 |
| Outer ring | 77 (3) | 77 (2) | 78 (3) | 0.10 |
| Macular volume (mm3) | ||||
| ETDRS grid | 2.2 (0.1) | 2.2 (0.1) | 2.2 (0.1) | 0.57 |
| Nerve fiber layer, number of eyes | 319 | 309 | 241 | |
| Macular thickness (µm) | ||||
| Central circle | 13 (3) | 13 (3) | 13 (2) | 0.32 |
| Inner ring | 23 (3) | 24 (3) | 24 (3) | 0.21 |
| Outer ring | 39 (6) | 39 (6) | 39 (7) | 0.83 |
| Macular volume (mm3) | ||||
| ETDRS grid | 1.0 (0.1) | 1.0 (0.2) | 1.0 (0.2) | 0.93 |
| Ganglion cell layer, number of eyes | 317 | 309 | 240 | |
| Macular thickness (µm) | ||||
| Central circle | 17 (13) | 16 (4) | 16 (4) | 0.08 |
| Inner ring | 46 (7) | 45 (6) | 44 (7) | <0.0001 |
| Outer ring | 30 (4) | 30 (4) | 29 (4) | <0.0001 |
| Macular volume (mm3) | ||||
| ETDRS grid | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) | <0.0001 |
| Inner plexiform layer, number of eyes | 307 | 308 | 230 | |
| Macular thickness (µm) | ||||
| Central circle | 22 (4) | 21 (4) | 21 (4) | 0.04 |
| Inner ring | 38 (4) | 37 (4) | 37 (4) | <0.0001 |
| Outer ring | 26 (2) | 25 (3) | 25 (2) | 0.006 |
| Macular volume (mm3) | ||||
| ETDRS grid | 0.80 (0.07) | 0.78 (0.07) | 0.78 (0.07) | 0.0004 |
| Inner nuclear layer, number of eyes | 307 | 308 | 230 | |
| Macular thickness (µm) | ||||
| Central circle | 22 (7) | 23 (6) | 24 (7) | 0.10 |
| Inner ring | 39 (4) | 39 (3) | 39 (3) | 0.03 |
| Outer ring | 30 (3) | 30 (2) | 30 (2) | 0.13 |
| Macular volume (mm3) | ||||
| ETDRS grid | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) | 0.08 |
| Outer plexiform layer, number of eyes | 311 | 311 | 234 | |
| Macular thickness (µm) | ||||
| Central circle | 28 (6) | 28 (7) | 28 (6) | 0.61 |
| Inner ring | 34 (4) | 34 (5) | 34 (4) | 0.89 |
| Outer ring | 27 (2) | 27 (2) | 27 (2) | 0.16 |
| Macular volume (mm3) | ||||
| ETDRS grid | 0.8 (0.1) | 0.8 (0.1) | 0.8 (0.1) | 0.27 |
| Outer nuclear layer, number of eyes | 311 | 311 | 234 | |
| Macular thickness (µm) | ||||
| Central circle | 90 (12) | 90 (12) | 87 (15) | 0.01 |
| Inner ring | 69 (8) | 68 (9) | 65 (10) | 0.0001 |
| Outer ring | 54 (6) | 53 (7) | 52 (6) | 0.003 |
| Macular volume (mm3) | ||||
| ETDRS grid | 2 (0.2) | 2 (0.2) | 2 (0.2) | 0.001 |
| Photoreceptor layer, number of eyes | 330 | 321 | 255 | |
| Macular thickness (µm) | ||||
| Central circle | 69 (5) | 68 (5) | 68 (4) | 0.004 |
| Inner ring | 64 (2) | 64 (2) | 64 (2) | 0.65 |
| Outer ring | 64 (2) | 64 (2) | 64 (2) | 0.34 |
| Macular volume (mm3) | ||||
| ETDRS grid | 1.8 (0.1) | 1.8 (0.1) | 1.8 (0.1) | 0.83 |
| Retinal pigment epithelium, number of eyes | 330 | 321 | 255 | |
| Macular thickness (µm) | ||||
| Central circle | 17 (10) | 18 (11) | 18 (20) | 0.59 |
| Inner ring | 15 (5) | 15 (3) | 15 (6) | 0.77 |
| Outer ring | 13 (2) | 13 (1) | 13 (2) | 0.08 |
| Macular volume (mm3) | ||||
| ETDRS grid | 0.4 (0.1) | 0.4 (0.04) | 0.4 (0.1) | 0.25 |
Numbers are presented as mean (SD).