Table 3.
Results of multivariable regression models evaluating the association of race and ethnicity with optical coherence tomography retinal nerve fiber layer thickness variability (standard deviation [SD] of the residuals) adjusting for covariates.
| Parameter | Coefficient | 95% CI | P value | |
|---|---|---|---|---|
| BY RACE | ||||
| Black or African American race | 0.193 | 0.075 | 0.311 | 0.001 |
| Mean OCT RNFL, per 1 μm higher | 0.012 | 0.008 | 0.016 | <0.001 |
| Race x Mean OCT RNFL | 0.007 | −0.002 | 0.017 | 0.129 |
| Baseline Age, per 10 years | 0.011 | −0.032 | 0.054 | 0.630 |
| Follow-up duration, per 1 year | 0.031 | 0.013 | 0.050 | 0.001 |
| BY ETHNICITY | ||||
| Hispanic or Latino ethnicity | −0.145 | −0.243 | −0.047 | 0.004 |
| Mean OCT RNFL, per 1 μm higher | 0.015 | 0.010 | 0.020 | <0.001 |
| Ethnicity x Mean OCT RNFL | −0.004 | −0.012 | 0.003 | 0.280 |
| Baseline Age, per 10 years | −0.013 | −0.057 | 0.032 | 0.581 |
| Follow-up duration, per 1 year | 0.030 | 0.011 | 0.048 | 0.002 |
CI = Confidence interval; OCT = Optical coherence tomography; RNFL = Retinal nerve fiber layer; SD = standard deviation.