Table 2.
Status of Study Eyes at the Time of Patient Enrollment, SST Group H Trial
|
No. (%) of Patients by Treatment Arm |
||
|---|---|---|
| Variable | Observation (n = 113) | Surgery (n = 112) |
| Probable cause of neovascular lesion | ||
| Ocular histoplasmosis | 97 (86) | 95 (85) |
| Idiopathic | 13 (12) | 14 (12) |
| Other | 3 (3) | 3 (3) |
| Visual acuity, Snellen equivalent | ||
| 20/50–20/80 | 53 (47) | 49 (44) |
| 20/100–20/160 | 32 (28) | 34 (30) |
| 20/200–20/320 | 20 (18) | 22 (20) |
| 20/400–20/640 | 6 (5) | 6 (5) |
| ≤20/800 | 2 (2) | 1 (1) |
| Contrast threshold, % contrast required | ||
| ≤1.6 | 0 | 1 (1) |
| >1.6–3.2 | 39 (35) | 42 (38) |
| >3.2–6.3 | 47 (42) | 41 (37) |
| >6.3–12.6 | 17 (15) | 17 (15) |
| >12.6 | 10 (9) | 11 (10) |
| Reading speed with enlarged text, wpm* | ||
| ≥120 | 10 (9) | 14 (13) |
| 100–119 | 9 (8) | 12 (11) |
| 80–99 | 15 (14) | 13 (12) |
| 60–79 | 25 (23) | 19 (17) |
| 40–59 | 22 (20) | 17 (16) |
| 20–39 | 12 (11) | 21 (19) |
| 0–19 | 16 (15) | 13 (12) |
| Total size of subfoveal lesion, DA† | ||
| ≤2.0 | 49 (43) | 57 (51) |
| >2-≤3.5 | 26 (23) | 22 (20) |
| >3.5-≤6.0 | 29 (26) | 22 (20) |
| >6.0-≤9.0 | 6 (5) | 10 (9) |
| >9.0 | 2 (2) | 1 (1) |
| Indeterminate | 1 (1) | 0 |
| Occult CNV present | ||
| Yes | 38 (34) | 38 (34) |
| Questionable | 4 (4) | 1 (1) |
| Previous laser photocoagulation | 39 (35) | 25 (22) |
| Study eye aphakic or pseudophakic | 5 (4) | 0 |
Abbreviations: CNV, choroidal neovascularization; DA, disc areas; SST, Submacular Surgery Trials; wpm, words per minute.
*
Reading speed measured for 109 study eyes in each treatment arm.