Table 3. Comparison of conjunctival hemodynamic descriptors in arterioles between C and DR subjects in unadjusted (Model 1) and adjusted (Model 2) models.

	D (μm)		V (mm/s)		Q (pl/s)		WSR (s−1)		WSS (dyne/cm2)
	β	P	β	P	β	P	β	P	β	P
Intercept	18	<0.001	0.69	<0.001	144	<0.001	278	<0.001	8.6	<0.001
Model 1: DR Stage Effect*
C	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
NDR	0.7	0.5	−0.16	<0.001	−21	0.3	−87	<0.001	−3.2	<0.001
NPDR	0.7	0.4	−0.07	0.2	−6	0.8	−47	0.04	−2.4	0.01
PDR	0.4	0.7	−0.04	0.4	8	0.7	−32	0.2	−1.8	0.05
Intercept	21	<0.001	0.98	<0.001	575	<0.001	755	<0.001	19.3	<0.001
Model 2: DR Stage Effect**
C	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
NDR	0.1	0.9	−0.11	0.01	−16	0.4	−60	<0.001	−2.2	<0.001
NPDR	0.8	0.4	0.02	0.7	14	0.5	−15	0.5	−1.1	0.2
PDR	0.9	0.4	0.00	0.1	13	0.6	−18	0.4	−0.9	0.3

C, NDR, NPDR, and PDR are abbreviations for non-diabetic control, no clinically visible diabetic retinopathy, non-proliferative diabetic retinopathy, and proliferative diabetic retinopathy, respectively. D, V, Q, WSR, and WSS are abbreviations for diameter, axial blood velocity, blood flow, wall shear rate and wall shear stress, respectively. Bold indicates statistical significance.

*Unadjusted.

**Adjusted for age, race, sex, mean arterial pressure, heart rate, hematocrit, and hemoglobin A1C.