Table 4 Characteristics of all participants included and excluded in this study

Age (year)^a

94.75 ± 9.46

96.03 ± 9.33

Females (%)

1115 (72.07%)

184 (73.60%)

Ethnic Han (%)

1388 (89.72%)

225 (90.00%)

SBP (mmHg)^a

150.91 ± 24.59

150.06 ± 25.45

DBP (mmHg)^a

77.97 ± 13.40

77.61 ± 13.27

RBC (10¹²/L)^a

4.20 ± 0.66

4.24 ± 0.65

Hemoglobin (g/L)^a

119.03 ± 18.28

121.06 ± 20.42

MCHC (g/L)^a

313.46 ± 13.13

314.78 ± 12.92

WBC (10⁹/L)^a

6.21 ± 1.77

6.11 ± 1.98

Neutrophil^a

0.56 ± 0.17

0.560.10

CRP (mg/L)^a

0.57 ± 2.06

0.52 ± 0.92