Table 1.

Comparison of demographic data between PD-pRBD and PD-NRBD.

Variable	PD-pRBD	PD-NRBD	P
	(n = 1,010)	(n = 1,430)
Age (years)	64.79 ± 9.10	60.64 ± 10.10	<0.001*
Sex (male/female, n)	513/497	739/691	0.666
Educational levela	365/536/109	412/816/202	<0.001*
BMI (kg/m2)	22.42 ± 3.18	22.83 ± 3.02	0.002*

^aPrimary school and below/secondary school/university and above, cases; BMI, body mass index.

^*Statistically significant (p < 0.05).