Table 3.
Characteristics of Treatment Groups
| GDD (CPT 66180) | PT (CPT 66170) | TS (CPT 66172) | |
|---|---|---|---|
| Demographic characteristics | |||
| Mean age | 77.9 | 78.1 | 78.1 |
| Male (%) | 39.8 | 36.9* | 36.4* |
| White (%) | 74.3 | 80.1† | 78.7** |
| Black (%) | 20.6 | 15.5† | 17.2** |
| Other (%) | 4.9 | 3.9 | 3.9 |
| Unknown/race missing (%) | 0.2 | 0.5 | 0.3 |
| Diagnosis before treatment | |||
| Age-related macular degeneration | 25.5 | 16.9† | 20.6† |
| Primary open angle glaucoma | 62.9 | 68.9† | 73.7† |
| Neovascular glaucoma | 6.2 | 0.4† | 0.7† |
| Uveitic glaucoma | 5.1 | 1.2† | 2.2† |
| Narrow angle glaucoma | 5.7 | 6.0 | 4.8 |
| Suspect glaucoma | 8.1 | 13.1† | 9.0 |
| Other glaucoma | 11.2 | 10.0 | 9.3* |
| Adverse outcomes before treatment | |||
| Severe complications | 9.0 | 1.6† | 4.0† |
| Endophthalmitis | 2.0 | 0.3† | 0.7† |
| Retinal detachment: rhegmatogenous | 5.3 | 1.1† | 2.8† |
| Retinal detachment: tractional | 1.4 | 0.2† | 0.4† |
| Suprachoroidal hemorrhage | 1.3 | 0.1† | 0.5** |
| Less severe complications | 25.0 | 1.8† | 6.9† |
| Choroidal detachment | 1.9 | 0.1† | 0.8** |
| Corneal edema | 23.0 | 1.6† | 5.2† |
| Hypotony | 1.9 | 0.1† | 1.3 |
| Reoperation | 3.4 | 0.9† | 4.2 |
| Cyclodestruction TDC | 2.9 | 0.4† | 0.9† |
| Cyclodestruction therapy | 0.4 | 0.2 | 0.2 |
| Wound revision | 0.0 | 0.4* | 3.1† |
| Tube revision | 0.1 | 0.0† | 0.0* |
| Blindness/low vision | 8.6 | 2.0† | 3.5† |
| Sample | 1,398 | 9,719 | 3,374 |
CPT = Current Procedural Terminology; PT = primary trabeculectomy; TDC = transscleral diode laser cycloablation; TS = trabeculectomy with previous scarring.
*
P<0.05 for values compared against glaucoma drainage device (GDD) group.
**
P<0.01 for values compared against glaucoma drainage device (GDD) group.
†
P<0.001 for values compared against glaucoma drainage device (GDD) group.