TABLE 3.
Univariable Linear Regression for Factors Associated With VF Testing Frequency
| No. patients | Mean VF per year (SE) | Estimated difference in VF/year (95% CI) | P | |
|---|---|---|---|---|
| Age at first VF (per year increase) | 61 | −0.01 (−0.1 to 0.1) | 0.81 | |
| Self-reported race | 0.01 | |||
| Asian | 8 | 1.9 (0.3) | Reference | |
| White | 11 | 1.3 (0.2) | −0.6 (−1.2 to 0.1) | 0.08 |
| Black | 5 | 0.6 (0.3) | −1.2 (−2.0 to −0.4) | 0.002 |
| Multiracial | 3 | 0.6 (0.4) | −1.3 (−2.2 to −0.3) | 0.008 |
| Other or declined to state | 34 | 1.3 (0.1) | −0.5 (−1.1 to 0.01) | 0.06 |
| Ethnicity | 0.55 | |||
| Hispanic or Latino | 27 | 1.3 (0.2) | Reference | 0.80 |
| Not Hispanic or Latino | 32 | 1.3 (0.1) | 0.1 (−0.3 to 0.4) | 0.31 |
| Unknown | 2 | 0.7 (0.5) | −0.6 (−1.7 to 0.5) | |
| Sex | 0.78 | |||
| Female | 35 | 1.2 (0.1) | Reference | |
| Male | 26 | 1.1 (0.2) | −0.1 (−0.4 to 0.3) | 0.78 |
| Primary language | 0.07 | |||
| English | 46 | 1.2 (0.1) | Reference | |
| Spanish | 11 | 1.5 (0.2) | 0.4 (−0.1 to 0.8) | 0.16 |
| Other | 4 | 2.0 (0.4) | 0.8 (0.1 to 1.6) | 0.04 |
| Glaucoma diagnosis | 0.69 | |||
| Primary congenital glaucoma | 15 | 1.2 (0.2) | Reference | |
| Juvenile open angle glaucoma | 5 | 1.0 (0.3) | −0.2 (−1.0 to 0.6) | 0.61 |
| Associated with nonacquired ocular anomalies | 11 | 1.4 (0.2) | 0.1 (−0.4 to 0.7) | 0.63 |
| Associated with nonacquired systemic disease or syndrome | 3 | 1.0 (0.4) | −0.3 (−1.2 to 0.7) | 0.59 |
| Associated with acquired conditions | 13 | 1.5 (0.2) | 0.3 (−0.2 to 0.9) | 0.27 |
| Glaucoma following cataract surgery | 14 | 1.2 (0.2) | −0.04 (−0.6 to 0.5) | 0.90 |
| Distance to provider (miles) | 0.53 | |||
| 0-25 | 24 | 1.4 (0.2) | Reference | |
| 25-50 | 15 | 1.1 (0.2) | −0.3 (−0.8 to 0.2) | 0.25 |
| 50-200 | 17 | 1.4 (0.2) | 0.1 (−0.4 to 0.5) | 0.83 |
| >200 | 5 | 1.1 (0.3) | −0.3 (−1.0 to 0.4) | 0.40 |
| Insurance type | 0.23 | |||
| No insurance | 2 | 2.0 (0.5) | Reference | |
| Public insurance | 38 | 1.2 (0.1) | −0.8 (−1.9 to 0.3) | 0.15 |
| Private insurance | 21 | 1.4 (0.2) | −0.6 (−1.6 to 0.5) | 0.32 |
| logMAR visual acuity,* better eye (per 0.1 unit decrease) | 61 | 0.052 (0.001 to 0.103) | 0.045 | |
| logMAR visual acuity,* worse eye (per 0.1 unit increase) | 61 | 0.024 (−0.014 to 0.062) | 0.22 | |
| VFI,* better eye (per 1% increase) | 59 | 0.4 (−0.8 to 1.5) | 0.53 | |
| VFI,* worse eye (per 1% increase) | 59 | −0.1 (−0.9 to 0.7) | 0.84 | |
| MD,* better eye (per 1 dB increase) | 60 | 0.02 (−0.01 to 0.1) | 0.27 | |
| MD,* worse eye (per 1 dB increase) | 60 | 0.00 (−0.02 to 0.03) | 0.73 | |
| Office visit frequency (per 1 visit/year increase) | 61 | 0.2 (0.1 to 0.3) | <0.001 | |
| Compliance score (per 1 unit compliance increase) | 57 | 0.7 (−0.0 to 1.4) | 0.07 |
Bolded P values are statistically significant.
*
logMAR, VFI, and MD taken from first visual field test.
CI indicates confidence interval; MD, mean deviation; VF, visual field; VFI, visual field index.