Table 3: Choroidal thickness comparison between groups.

ETDRS regionGroups 1-2Groups 1–3Groups 2–4
CT reduction (μm)CT reduction (μm)CT reduction (μm)

Center77.98<0.00176.73<0.00151.52<0.001
Inner temporal86.36<0.00171.54<0.00155.57<0.001
Inner superior68.77<0.00168.32<0.00148.66<0.001
Inner nasal67.30<0.00184.38<0.00144.81<0.001
Inner inferior97.89<0.00186.19<0.00144.70<0.001
Outer temporal87.83<0.00152.93<0.00152.56<0.001
Outer superior76.58<0.00164.25<0.00149.91<0.001
Outer nasal55.25<0.00173.80<0.00132.22<0.001
Outer inferior103.28<0.00173.83<0.00138.85<0.001

Sector of the new division
Zone 1 nasal65.38<0.00159.40<0.00131.76<0.001
Zone 1 temporal61.88<0.00147.76<0.00132.38<0.001
Zone 2 nasal77.27<0.00165.83<0.00135.39<0.001
Zone 2 temporal72.89<0.00157.34<0.00139.72<0.001
Zone 3 nasal82.99<0.00172.52<0.00141.69<0.001
Zone 3 temporal79.57<0.00163.29<0.00142.47<0.001
Zone 4 nasal87.85<0.00175.44<0.00144.89<0.001
Zone 4 temporal85.39<0.00168.42<0.00144.05<0.001
Zone 5 nasal86.83<0.00174.71<0.00148.48<0.001
Zone 5 temporal84.40<0.00170.42<0.00146.76<0.001