Table 1.

The demographics and RBANS scores of the case and control groups.

	Case	Control	t/X2	P
	n = 190	n = 200
Age (year)	34.35 ± 9.78	33.39 ± 8.83	t = 1.013	0.312
Sex (male/female)	89/101	90/110	X2 = 0.133	0.761
Education (year)	12.58 ± 3.42	12.93 ± 2.66	t = −1.121	0.263
BMI (kg/m2)	23.87 ± 3.86	22.74 ± 3.31	t = 3.102	0.002
RBANS	364.20 ± 67.73	462.48 ± 55.15	t = −15.666	<0.001
Immediate memory	64.15 ± 17.38	85.92 ± 16.43	t = −12.716	<0.001
Visuospatial	73.98 ± 15.61	82.97 ± 16.89	t = −5.447	<0.001
Language	73.33 ± 17.31	93.68 ± 14.98	t = −12.389	<0.001
Attention	88.82 ± 17.44	110.14 ± 16.40	t = −12.445	<0.001
Delayed memory	63.99 ± 19.74	89.68 ± 11.66	t = −15.552	<0.001

BMI, Body mass index; RBANS, the Repeatable Battery for the Assessment of Neuropsychological Status.

Data were present in Mean ± SD or N.