Table 2.

Daily decline in ERG amplitude by diet

ERG	T17M mice			P347S mice
	Control (n = 15)	Vitamin A (n = 15)	P value*	Control (n = 13)	Vitamin A (n = 12)	P value†
a-wave	0.013  ±  0.001 (1.32%)	0.007  ±  0.001 (0.72%)	0.005	0.027  ±  0.002 (2.66%)	0.025  ±  0.002 (2.42%)	0.35
b-wave	0.010  ±  0.001 (1.00%)	0.006  ±  0.001 (0.58%)	0.034	0.019  ±  0.002 (1.93%)	0.018  ±  0.002 (1.82%)	0.67

Data are presented as mean daily natural log ERG amplitude decline ± SEM, adjusted for significant covariates. Numbers in parentheses give the adjusted mean daily percentage decline in amplitude. 

^*Controlling for litter. 

^†Controlling for baseline amplitude.