Table 2. Relationship between sleep quality and age and schooling, as well as the P300 latency and amplitude measures. São Carlos, São Paulo, Brazil, 2024.

	Good sleep (N=15)			Altered sleep (N=13)
	N (%)	Mean	SD	N (%)	Mean	SD	p-value
Gender
Female	12 (80)	-	-	11 (84)	-	-	-
Male	3 (20)	-	-	2 (15)	-	-	-
Age	15	65.80	4.39	13	66.76	7.20	0.92
Schooling	15	10.73	7.22	13	12.85	5.77	0.21
P300 latency
Cz	14	364.85	43.97	11	364.63	74.25	0.70
Fz	13	361.76	46.02	11	355.27	57.46	0.68
Pz	13	371.84	40.48	11	352.54	61.21	0.13
P300 amplitude
Cz	14	8.67	4.23	11	5.12	4.04	0.07*
Fz	13	8, 94	3.06	11	5.15	3.41	0.00*
Pz	13	12.51	4.60	11	7.68	3.69	0.01*

Note:*p<0.05.