Table 3 Recomparison of participant characteristics between SCH patients and the strict control group (N = 2739)

Age(years)

50.84 ± 9.39

50.82 ± 9.42

t = 0.04, P = 0.966

Sex (%)

χ² = 0.0001, P = 0.991

 Male

1028(50.05)

343(50.07)

 female

1026(49.95)

342(49.93)

Smoke

χ² = 1.697, P = 0.193

 No

1492(72.64)

515(75.18)

 Yes

562(27.36)

170(24.82)

Thyroid nodule

χ² = 0.253, P = 0.615

 No

841(40.94)

273(39.85)

 Yes

1213(59.06)

412(60.15)

Fatty liver

χ² = 0.015, P = 0.903

 NO

830(40.41)

275(40.15)

 Yes

1224(59.59)

410(59.85)

Hypertension

χ² = 0.291, P = 0.590

 NO

1298(63.19)

425(62.04)

 Yes

756(36.81)

26.(37.96)

SBP (mmHg)

121.28 ± 17.26

121.36 ± 17.41

Z = 0.273, P = 0.785

DBP (mmHg)

78.72 ± 11.33

79.22 ± 11.25

Z = 1.026, P = 0.305

BMI (kg/m²)

24.85 ± 3.36

24.88 ± 3.24

Z = 0.478, P = 0.633

HGB (g/L)

143.01 ± 15.42

143.35 ± 14.71

Z = 0.277, P = 0.782

TC (mmol/L)

4.76 ± 0.88

4.87 ± 0.92

Z = 2.372, P = 0.018 *

TG (mmol/L)

1.59 ± 1.12

1.76 ± 1.75

Z = 2.385, P = 0.017 *

LDL-C (mmol/L)

3.07 ± 0.78

3.13 ± 0.79

Z = 2.008, P = 0.045 *

HDL-C (mmol/L)

1.31 ± 0.35

1.29 ± 0.33

Z = 0.763, P = 0.446

FBG (mmol/L)

5.64 ± 1.18

5.56 ± 1.06

Z = 1.340, P = 0.180

Hcy(μmol/L)

11.42 ± 5.53

11.85 ± 5.90

Z = 1.855, P = 0.634

UA(μmol/L)

321.81 ± 84.55

329.54 ± 86.29

Z = 2.031, P = 0.042 *

HbA1c(%)

5.79 ± 0.74

5.75 ± 0.71

Z = 0.797, P = 0.425