Table 3.

Results of multivariable linear mixed effects model investigating the effect of corneal hysteresis on Visual Field Index (VFI) decline over time, adjusting for potentially confounding factors.

Parameter	β (SE)	P
Intercept (%)	94.9 (0.74)	<0.001
Time (%/year)	0.20 (0.13)	0.11
Baseline Age (per 1 year older)	−0.07 (0.07)	0.35
Baseline Age × time	0.012 (0.012)	0.33
Race (African American)	−1.11 (1.43)	0.44
Race × time	0.15 (0.26)	0.57
Baseline Corneal hysteresis (per 1 mmHg lower)	0.27 (0.46)	0.56
Baseline Corneal hysteresis × time	−0.16 (0.07)	0.03
Baseline intraocular pressure (per 1 mmHg higher)	0.97 (0.19)	<0.001
Baseline intraocular pressure × time	−0.13 (0.03)	<0.001
Baseline intraocular pressure × Baseline corneal hysteresis × time	−0.054 (0.017)	0.001
Central corneal thickness (per 100 µm thinner)	−2.7 (2.0)	0.180
Central corneal thickness × time	−0.78 (0.34)	0.022
Axial length (per 1 mm longer)	0.34 (0.58)	0.55
Axial length × time	−0.07 (0.10)	0.47

^*The interaction terms with time correspond to the effect of the predictive factor on rate of VFI change over time. Negative values correspond to faster rate of VFI decline over time. Variables were centered at their mean values. SE - standard error.