Table 1:
Baseline descriptive statistics of the IRIS Registry Eyes in the Laser Trabeculoplasty Study
| Categorical Variables and Baseline Values | n | % | |
|---|---|---|---|
| Age Group (in years)2 | 18–39 | 2,968 | 1.1% |
| 40–64 | 63,322 | 24.0% | |
| 65–79 | 127,298 | 48.3% | |
| 80+ | 68,802 | 26.1% | |
| Not Recorded | 1,090 | 0.4% | |
| Sex1 | Male | 81,992 | 43.8% |
| Female | 104,951 | 56.0% | |
| Not Recorded | 400 | 0.2% | |
| Race1 | Asian | 4,066 | 2.2% |
| Black | 22,101 | 11.8% | |
| Not Recorded | 12,264 | 6.5% | |
| White | 121,420 | 64.8% | |
| Hispanic | 9,460 | 5.0% | |
| Other/Multi-Racial | 18,032 | 9.6% | |
| Insurance1 | Dual Medicaid & Medicare | 23,813 | 12.7% |
| Medicaid | 3,970 | 2.1% | |
| Medicare Advantage | 20,984 | 11.2% | |
| Medicare Fee-For-Service | 84,065 | 44.9% | |
| Military | 1,072 | 0.6% | |
| Other Government | 309 | 0.2% | |
| Private | 38,600 | 20.6% | |
| Not Recorded | 14,530 | 7.8% | |
| Region2 | Midwest | 61,358 | 23.3% |
| Northeast | 47,025 | 17.8% | |
| South | 103,101 | 39.1% | |
| West | 46,828 | 17.8% | |
| Not Recorded | 5,168 | 2.0% | |
| Diabetes1 | Yes | 36,127 | 19.3% |
| Hypertension1 | Yes | 5,432 | 2.9% |
| LTP Type2 | Single | 256,129 | 97.2% |
| Double | 7,351 | 2.8% | |
| Angle Recession2 | Yes | 560 | 0.2% |
| Uveitis2 | Yes | 2,706 | 1.0% |
| Glaucoma Procedure2 | 2.0% | ||
| Yes | 5,214 | ||
| Lens Surgery2 | Yes | 19,011 | 7.2% |
| Intravitreal Injection/Surgery2 | Yes | 6,479 | 2.5% |
| Glaucoma | 50,506 | 19.2% | |
| Provider Specialty2 | Cataract | 116,531 | 44.2% |
| Other | 92,966 | 35.3% | |
| Unknown | 3,477 | 1.3% | |
| Provider Laser Trabeculoplasty Count2 | <=50 | 95,941 | 36.4% |
| 51–99 | 53,302 | 20.2% | |
| 100–499 | 101,641 | 38.6% | |
| 500+ | 12,596 | 4.8% | |
| Glaucoma Type2 | Glaucoma Suspect | 49,054 | 18.6% |
| Primary open angle glaucoma | 192,707 | 73.1% | |
| Trauma/Other Eye Disorders | 1,200 | 0.5% | |
| Inflammation/Drugs | 695 | 0.3% | |
| Other Glaucoma | 503 | 0.2% | |
| Unspecified Glaucoma | 19,321 | 7.3% | |
| Glaucoma Severity2 | Mild | 47,165 | 17.9% |
| Moderate | 59,123 | 22.4% | |
| Severe | 36,605 | 13.9% | |
| Indeterminate | 6,355 | 2.4% | |
| Not Recorded | 45,354 | 17.2% | |
| Not Applicable | 68,878 | 26.1% | |
| Lens Status2 | Phakic/Cataract | 91,505 | 34.7% |
| Pesudophakia | 21,319 | 8.1% | |
| Aphakia | 733 | 0.3% | |
| Not Recorded | 149,923 | 56.9% | |
| Continuous Baseline Varaibles | mean(SD) | min-max | |
| Mean IOP (mm Hg)2 | 19.1 (5.0) | 1–68 | |
| Mean LogMAR Visual Acuity2 | 0.22 (0.28) | −0.30–2.00 | |
| Number Glaucoma Medication Categories2 | 2.1 (1.5) | 0–7 | |
| Age2 | 71.4 (11.7) | 18–99 | |
Note:
(1)
Variable is per patient (n = 187,343)
(2)
Variable is per eye (n = 263,480).
% = percentage; IOP = intra-ocular pressure; IRIS = Intelligent Research in Sight; LogMAR = logarithm of the minimum angle of resolution; LTP = Laser Trabeculoplasty; max = maximum; min = minimum; mm Hg = millimeters of mercury; n = number; NPI = National Provider Identifier; SD = standard deviation;