Table 2.
Repeated Measures Regression Model Results for the Outcomes Average Excursion Size and Average Excursion Spana
| Average Excursion Size, Miles | Average Excursion Span, Miles | |||
|---|---|---|---|---|
| Univariate | Multivariate | Univariate | Multivariate | |
| Variable | Coefficient | Coefficient (95% CI) | Coefficient | Coefficient (95% CI) |
| Acuityb | −0.33c | −0.26 (−0.49 to −0.02)c | −0.34c | −0.26 (−0.56 to −0.13)c |
| Age, yd | −0.85c | −0.85 (−1.50 to −0.25)c | −0.95c | −0.95 (−0.90 to −1.55)c |
| Male | 0.01 | −0.16 | ||
| African American | −1.57c | −1.96 (−3.71 to −0.20)c | −1.46 | −1.97 (−3.71 to −0.24)c |
| Married (yes vs no) | 2.27c | 1.97 (0.73 to 3.21)c | 2.01c | 1.72 (0.50 to 2.94)c |
| Employed (yes vs no), y | 0.62 | 0.62 | ||
| Driving status (yes vs no) | 2.71c | 2.64c | ||
| Education | 0.24 | 0.23 | ||
| Population/sq milee | −0.25c | −0.21 (−0.34 to −0.09)c | −0.22c | −0.19 (−0.31 to −0.07)c |
| Weekday (yes vs no) | −1.31 | −1.32 | ||
a
Analysis results are based on the 1048 person tracking days.
b
Results for acuity are for a 0.1 incremental change in logMAR.
c
Coefficients represent significance at the 0.05 level. These results focus on the effect of acuity and therefore only consider the control subjects and those with age-related macular degeneration.
d
Results for age are for a 5-year incremental change in years of age.
e
Population per square mile in units of 1000 people.