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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Am J Ophthalmol. 2019 Jan 8;200:100–109. doi: 10.1016/j.ajo.2018.12.024

Table 2.

Ophthalmic Resource Utilization During 2 Years of Follow-Up for Enrollees with Incident and Prevalent Primary Open-Angle Glaucoma and Exfoliation Syndrome Glaucoma

Incident Cases Prevalent Cases
POAG XFG p-value POAG XFG p-value
N % N % N % N %
Total enrollees 7339 192 89036 2745
Diagnostic Procedures (%) Any glaucoma diagnostic test* 7121 97.0% 189 98.4% 0.25 83833 94.2% 2657 96.8% <0.0001
Perimetry 6216 84.7% 166 86.5% 0.50 71079 79.8% 2341 85.3% <0.0001
Gonioscopy 2716 37.0% 105 54.7% <0.0001 23736 26.7% 1082 39.4% <0.0001
Fundus Photography 2964 40.4% 92 47.9% 0.036 31115 35.0% 974 35.5% 0.56
Other ocular imaging 5577 76.0% 145 75.5% 0.88 62333 70.0% 1964 71.6% 0.083
Any other diagnostic test± 4156 56.6% 135 70.3% 0.0002 46188 51.9% 1673 61.0% <0.0001
Therapeutic Procedures (%) Any Ocular Surgery** 3282 44.7% 118 61.5% <0.0001 32277 36.3% 1495 54.5% <0.0001
Any Glaucoma Surgery** 1443 19.7% 55 28.7% 0.002 12591 14.1% 860 31.3% <0.0001
Trabeculectomy 68 0.9% 4 2.1% 0.10 1611 1.8% 233 8.1% <0.0001
GDI 26 0.4% 2 1.0% 0.12 889 1.0% 103 3.8% <0.0001
LTP 1120 15.3% 38 19.8% 0.086 8585 9.6% 511 18.6% <0.0001
Medication 6839 93.2% 175 91.2% 0.27 87629 98.4% 2680 97.6% 0.0012
Cataract Surgery 1391 19.0% 67 34.9% <0.0001 10964 12.3% 643 23.4% <0.0001

Primary open angle glaucoma (POAG); Exfoliation Glaucoma (XFG); Glaucoma Drainage Implant (GDI); Laser Trabeculoplasty (LTP).

Proportions capture enrollees who underwent 1 or more of a given service during the 2 years of follow-up.

*

Any glaucoma diagnostic test includes gonioscopy, fundus photography, perimetry, optical coherence tomography.

±

Any other diagnostic test – see Online Table 1 available at http://www.ajo.com for included CPT codes.

***

Any Glaucoma Surgery includes laser iridotomy, trabeculoplasty, trabeculectomy and glaucoma drainage implant insertion.

**

Any Ocular Surgery includes all laser and incisional ophthalmic surgeries, including but not limited to glaucoma surgeries.

Group comparisons were performed using Pearson chi-square test