Table 3. Mini-mental State Examination and Education Levels between Young and Old Aged.

Variables	Young (n = 33)	Old (n = 25)	P value
Mini-mental state examination
Preoperative	28 [27–29]	27 [25–28]	0.001
Postoperative 5 day	29 [28–30]	27 [27–29]	0.005
Education level
0–6 yr of schooling	5	9	0.036
7–9 yr of schooling	5	7
Over 10 yr of schooling	23	9

Values are median [Q₁–Q₃] or number of patients. Young: age < 60 years, Old: age ≥ 60 years.