Table 1. Description of Study Sample.
| Characteristic | Mean (SD) | P Valuea | |
|---|---|---|---|
| Patients With HTG | Patients From OHTS | ||
| No. of eyes | 601 | 2806 | NA |
| No. of patients | 601 | 1407 | NA |
| Sex, No. (%) | |||
| Male | 291 (48.4) | 598 (42.5) | .05 |
| Female | 310 (51.6) | 809 (57.5) | |
| Race/ethnicity, No. (%)b | |||
| White | 275 (45.8) | 971 (69.0) | <.001 |
| Black | 304 (50.6) | 357 (25.4) | |
| Other | 22 (3.7) | 79 (5.6) | |
| Total No. of visits | 8228 | 57 809 | NA |
| No. of visual field tests per eye | 13.7 (5.5) | 20.6 (7.3) | <.001 |
| No. of IOP measurements per eye | 13.7 (5.5) | 20.6 (7.3) | <.001 |
| Follow-up, y | 6.3 (2.8) | 9.8 (3.7) | <.001 |
| Age at baseline, y | 63.1 (10.9) | 57.5 (9.6) | <.001 |
| Initial | |||
| Mean deviation, dB | −7.5 (5.6) | 0.0 (1.4) | <.001 |
| Pattern standard deviation, dB | 6.4 (3.7) | 2.0 (0.5) | <.001 |
| IOP, mm Hg | 17.7 (4.2) | 25.2 (3.0) | <.001 |
| Changec | |||
| Mean deviation, dB | −1.2 (4.3) | −0.2 (2.0) | <.001 |
| Pattern standard deviation, dB | 0.3 (2.3) | 0.2 (0.9) | .13 |
| IOP, mm Hg | −0.2 (5.0) | −1.1 (3.4) | <.001 |
Abbreviations: HTG, high-tension glaucoma; IOP, intraocular pressure; NA, not applicable; OHTS, Ocular Hypertension Treatment Study.
a
P values for sex, race/ethnicity, and number of eyes that progressed were computed using Pearson χ2 test for independent samples. All other P values were computed using a 2-sample t test.
b
Because of rounding, percentages may not sum to 100.
c
Change was computed as the reading at 60 months minus the initial reading; this statistic was computed only for those with enough measurements.