Analysis of the relationship between blood pressure variability and subtle cognitive decline in older adults

Table 1 General characteristics of participants

	NC (n = 237)	SCD (n = 182)	P value
Age, yr	70.35 ± 9.57	72.19 ± 10.31	0.002
Sex (male, %)	169 (71.31%)	127 (69.78%)	0.219
Education, yr	11.49 ± 4.12	10.05 ± 3.79	0.037
BMI (kg/m2)	22.47 ± 4.91	23.16 ± 5.03	0.291
Smoking, n (%)	51 (21.52)	39 (21.43)	0.479
Drinking, n (%)	72 (30.38)	57 (31.32)	0.517
Hypertension, n (%)	104 (43.88)	83 (45.60)	0.153
Diabetes, n (%)	35 (14.77)	31 (17.03)	0.021
CAD, n (%)	29 (12.24)	27 (14.84)	0.149
FBG (mmol/L)	5.41 ± 1.17	5.93 ± 1.61	0.037
PBG (mmol/L)	8.75 ± 2.81	8.59 ± 2.63	0.275
Scr (µmol/L)	82.45 ± 29.51	79.43 ± 28.72	0.117
TC (mmol/L)	4.53 ± 1.37	4.19 ± 0.95	0.093
TG (mmol/L)	1.32 ± 0.75	1.42 ± 0.81	0.055
HDL-C (mmol/L)	1.15 ± 0.51	1.17 ± 0.49	0.213
LDL-C (mmol/L)	2.39 ± 0.83	2.21 ± 0.79	0.314
SBP SD	10.52 ± 2.94	14.15 ± 4.37	0.000
DBP SD	7.32 ± 2.74	9.45 ± 3.07	0.040
SBP CV	12.35 ± 3.74	16.97 ± 4.91	0.000
DBP CV	9.85 ± 2.73	12.63 ± 3.81	0.006

NC: The control group; SCD: Subtle cognitive decline; BMI: Body mass index; CAD: Coronary artery disease; FBG: Fasting blood glucose; PBG: Postprandial blood glucose; Scr: Serum creatinine; TC: Total cholesterol; TG: Triglycerides; HDL-C: High-density lipoprotein cholesterol; LDL-C: Low-density lipoprotein cholesterol; SBP SD: 24-h systolic blood pressure standard deviation; SBP CV: 24-h systolic blood pressure coefficient of variation; DBP SD: 24-h diastolic blood pressure standard deviation; DBP CV: 24-h diastolic blood pressure variation coefficient.