Table 4.
Image quality in the first 6 months and last 6 months of the imaging period
| First 6 monthsa | Last 6 monthsa | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Image view | N | Acceptable | Poor | Missing | N | Acceptable | Poor | Missing | P value |
| Pupil size | 1860 | 1763 (95%) | 66 (4%) | 31 (2%) | 2007 | 1874 (93%) | 109 (5%) | 24 (1%) | 0.01 |
| Posterior pole | 1789 (96%) | 37 (2%) | 34 (2%) | 1932 (96%) | 59 (3%) | 16 (1%) | 0.003 | ||
| Nasal retina | 1519 (82%) | 256 (14%) | 85 (5%) | 1713 (85%) | 248 (12%) | 46 (2%) | <0.001 | ||
| Temporal retina | 1774 (95%) | 49 (3%) | 37 (2%) | 1935 (96%) | 55 (3%) | 17 (1%) | 0.01 | ||
| Inferior retina | 1650 (89%) | 100 (5%) | 110 (6%) | 1881 (94%) | 76 (4%) | 50 (2%) | <0.001 | ||
| Superior retina | 1736 (93%) | 87 (5%) | 37 (2%) | 1858 (93%) | 103 (5%) | 46 (2%) | 0.64 | ||
| All retinal images | 8468 (91%) | 529 (6%) | 303 (3%) | 9319 (93%) | 541 (5%) | 175 (2%) | 0.02 | ||
a
The first 6 months and the last 6 months is center specific, depending on when they start imaging and stop imaging.