Table 1. Within-group comparison of the serum BDNF level between male and female subjects in AMD subgroups and controls.

Study groups	Males		Females		Two-tailed t-test
Wet AMD	n=12	15.73±1.49	n=8	18.63±0.97	P=0.16
Dry AMD	n=5	14.60±1.64	n=11	16.18±2.11	P=0.64
Control	n=21	10.40± 0.75	n=15	10.21±1.12	P=0.85

Based on the two-tailed t-test results, gender did not affect BDNF levels across groups. AMD: Age-related macular degeneration; SEM: Standard error of mean; ng/mL: Nanogram per milliliter.

mean±SEM (ng/mL)