Table 1.
Frequency Distribution of Systemic Variables and Univariate Linear Regression with Vessel Density in the Healthy Participants of the African American Eye Disease Study
| Variables | N | Mean or Frequencya | Betab | P-Valuesb |
|---|---|---|---|---|
| Age (years) | 1029 | 58 ± 10 | −.0017 | <.0001c |
| Sex (Male) | 1029 | 369 (36) | −.0092 | 0.0016c |
| Diagnosis of Hypertension | 1029 | 611 (59) | −.0126 | <.0001c |
| Systolic Blood Pressure (mmHg) | 1026 | 130 ± 20 | −.0003 | 0.0001c |
| Diastolic Blood Pressure (mmHg) | 1026 | 80 ± 12 | −.0001 | 0.5556 |
| Body-Mass Index (kg/m2) | 1021 | 30.2 ± 7.0 | 0.0003 | 0.1295 |
| Hemoglobin A1c (%) | 960 | 6.0 ± 1.1 | −.0033 | 0.0088c |
| Diagnoses of Diabetes | 968 | 197 (20) | −.0118 | 0.0009c |
| Diabetes Duration (years) | 958 | 1.7 ± 5.2 | −.0009 | 0.0008c |
| Taking Blood Pressure Medications | 498 | 436 (88) | −.0107 | 0.0852 |
| History of Heart Failure or Stroke | 995 | 54 (5) | −.0057 | 0.3585 |
| History of Smoking | 988 | 430 (44) | −.0052 | 0.0706 |
| Signal Strength | 1029 | 9.3 ± 0.8 | 0.0291 | <.0001c |
| Vessel Density | 1029 | 0.346 ± 0.045 | - | - |
a
All data listed as mean ± standard deviation or frequency (percent).
b
Beta coefficients and p-values calculated from univariate linear regression with vessel density.
c
P ≤ 0.05 considered significant.