Table 3.

Comparison between Nonperfusion in Different Vascular Zones between the Thickest Average Venule Caliber (Quartile 4) and Thinner Venule Calibers (Quartiles 1–3)

Nonperfusion Index	Thinner Average Venule Caliber (Quartiles 1–3; n = 214)	Thickest Average Venule Caliber (Quartile 4; n = 71)	P Value*	Model 1	Model 2
Inner zone: retinal venular caliber
PP	0.030±0.058	0.056±0.082	0.001	0.019	0.056
MP	0.047±0.125	0.056±0.118	0.018	0.603	—
FP	0.066±0.168	0.073±0.168	0.762	—	—
Total	0.045±0.095	0.061±0.104	0.023	0.283	—
Outer zone: retinal venular caliber
PP	0.029±0.055	0.059±0.087	0.001	0.005	0.060
MP	0.045±0.121	0.062±0.130	0.127	0.250	—
FP	0.066±0.170	0.071±0.163	0.518	0.619	—
Total	0.044±0.093	0.064±0.111	0.038	0.120	—

FP = far periphery; MP = mid periphery; PP = posterior pole; — = no value.

^*Mann—Whitney U test.

^†Generalized estimating equation adjusting for correlation between 2 eyes, age, gender, type of diabetes mellitus, and arteriolar caliber.

^‡Model 1 and hemoglobin A1c, hypertension, and spherical equivalent.