Table 1.

Demographic information of the participants.

	Comparison group (n = 47)	Short-term using group (n = 46)	Long-term using group (n = 47)	P-value
Sex, male/female	30/17	31/15	28/19	0.735
Age, year, mean ± SD	71.40 ± 8.40	74.93 ± 10.78	75.06 ± 10.25	0.129
Education, year, mean ± SD	15.47 ± 2.67	14.11 ± 3.76	15.07 ± 2.92	0.103
Smoke, yes/no	5/42	5/41	7/40	0.778
Drink, yes/no	6/41	3/43	5/42	0.348
BMI, kg/m2, mean ± SD	24.30 ± 2.73	24.15 ± 2.60	23.00 ± 3.06	0.036*
Cerebrovascular disease, yes/no	17/30	20/26	25/22	0.249
Hypertension, yes/no	29/18	31/15	29/18	0.806
Coronary heart disease, yes/no	17/30	22/24	22/25	0.232
Diabetes, yes/no	19/32	12/34	18/29	0.295

BMI, Body Mass Index;

^*P < 0.05.