| Predictors | Outcome | p Value | |
| Plateau iris (n = 55) | Pseudo-plateau iris (n = 21) | ||
| Dichotomous | |||
| Sex (F/M) | 44/11 | 10/11 | 0.005 |
| Hypertension (Y/N) | 14/41 | 4/17 | 0.557 |
| Diabetes mellitus (Y/N) | 3/51 | 0/21 | 0.270 |
| Pilocarpine use pre UBM(Y/N) | 17/38 | 5/16 | 0.542 |
| Bumpy peripheral iris (Y/N) | 9/24 | 11/4 | 0.003 |
| Peripheral iridotomy prior to UBM(Y/N) | 17/36 | 8/11 | 0.431 |
| Peripheral iridotomy as part of treatment anytime (Y/N) | 48/7 | 18/3 | 0.0857 |
| Pilocarpine use follow-up (Y/N) | 36/19 | 11/9 | 0.408 |
| Trabeculectomy (Y/N) | 3/52 | 1/20 | 0.904 |
| Categorical | |||
| Race (1–5) | |||
| 1 = Caucasian | |||
| 2 = African | |||
| 3 = Indian | |||
| 4 = Oriental | |||
| 5 = Hispanic | 52/0/2/0/1 | 19/1/0/1/0 | 0.171 |
| No. of medications (0–2) | |||
| 0 = no glaucoma medications | |||
| 1 = one glaucoma medication | |||
| 2 = more than one glaucoma medication | 34/15/7 | 13/5/2 | 0.933 |
| Thyroid (0–2) | |||
| 0 = no history | |||
| 1 = hyperthyroid | |||
| 2 = hypothyroid | 50/2/3 | 20/0/1 | 0.668 |
| Past history of glaucoma symptoms or signs (0–4) | |||
| 0 = no symptoms | |||
| 1 = symptoms (halos, headache) | |||
| 2 = acute glaucoma attack in at least one eye | |||
| 3 = chronic angle-closure glaucoma | 34/12/6/3 | 14/3/2/1 | 0.916 |
| Family history (0–2) | |||
| 0 = no family history | |||
| 1 = family history of glaucoma | 33/21 | 11/10 | 0.649 |
| Continuous; mean (SD) | |||
| Age | 57.9 (10.2) | 51.5 (10.7) | 0.0190 |
| Spherical equivalent (D) | 1.33 (2.42) | 0.50(1.69) | 0.187 |
| Log MAR | 0.10 (0.17) | 0.07 (0.13) | 0.571 |
| IOP (mm Hg) | 15.9 (4.9) | 16.3 (3.0) | 0.7084 |
| Highest IOP (mm Hg) | 24.9 (9.7) | 22.3 (5.3) | 0.4973 |
| PAC | 0.27 (0.41) | 0.14 (0.13) | 0.2061 |
| No. of hours angle closure | 9.2 (4.2) | 5.1 (4.3) | 0.0009 |
| No. of hours PAS closed (0,2–5) | 31/0/1/0/2 | 12/1/0/1/0 | 0.059 |
| Angle pigment (0–4; 0.5 interval) | 1.3 (0.6) | 2.0 (0.7) | 0.004 |
| Lens (0–3; 0.5 interval) | 14/3/14/7/2 | 10/1/5/0/0 | 0.0269 |
| Vertical C/D ratio | 0.478 (0.219) | 0.53(0.179) | 0.3915 |
| Mean no. of meds used during treatment | 0.618 (0.85) | 0.810 (1.10) | 0.55 |
C/D ratio, cup–disc ratio; F/M, female/male; IOP, intraocular pressure; LogMAR, logarithm of the minimum angle of resolution; n, sample size; PAC, depth of peripheral anterior chamber using the van Herick method; PAS, peripheral anterior synechiae; PI, peripheral iridotomy; Y/N, yes/no.