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Table 3 Subgroup analysis of components of metabolic syndromes with free thyroxine hormone levels stratified by age and gender

From: Association between thyroid hormones and the components of metabolic syndrome

Variables

Free thyroxine hormone levels

Low

Normal (low tertile)

Normal (mid tertile)

Normal (high tertile)

High

βa

S.E

p-value

βa

S.E

p-value

βa

βa

S.E

p-value

βa

S.E

p-value

Waist circumference

Age

 19~ 44

3.248

1.715

0.0586

0.400

0.345

0.2471

Ref.

−0.537

0.300

0.0738

−1.062

0.892

0.2343

 45~ 64

0.745

1.113

0.5037

0.470

0.352

0.1818

Ref.

0.078

0.410

0.8495

0.394

1.668

0.8134

 64<

−1.085

3.667

0.7684

−0.026

0.927

0.9777

Ref.

−1.638

1.226

0.1868

−3.990

3.705

0.2859

Gender

 Male

1.998

2.172

0.3580

0.804

0.405

0.0477

Ref.

−0.270

0.336

0.4206

−0.684

0.957

0.4749

 Female

1.481

0.982

0.1322

0.070

0.284

0.8061

Ref.

−0.556

0.328

0.0909

−2.002

1.277

0.1173

Triglycerides

Age

 19~ 44

124.396

51.798

0.0165

10.341

10.430

0.3217

Ref.

−25.519

9.066

0.0050

−49.843

26.938

0.0646

 45~ 64

22.880

41.955

0.5858

14.699

13.253

0.2680

Ref.

−11.085

15.441

0.4732

−78.026

62.873

0.2153

 64<

−29.035

77.925

0.7108

−6.737

19.693

0.7335

Ref.

20.424

26.056

0.4363

−21.240

78.744

0.7883

Gender

 Male

−8.759

88.150

0.9209

19.926

16.443

0.2260

Ref.

−29.603

13.619

0.0301

−56.536

38.816

0.1457

 Female

59.246

19.538

0.0025

6.175

5.645

0.2744

Ref.

−8.730

6.527

0.1815

−39.210

25.395

0.1230

HDL cholesterol

Age

 19~ 44

−3.987

5.399

0.4605

0.135

1.096

0.9021

Ref.

2.554

0.952

0.0075

−0.867

2.954

0.7692

 45~ 64

0.799

4.276

0.8518

−1.313

1.360

0.3348

Ref.

−1.687

1.581

0.2868

−5.880

6.408

0.3594

 64<

6.579

10.435

0.5309

−1.360

2.688

0.6149

Ref.

3.663

3.507

0.3007

10.076

10.581

0.3450

Gender

 Male

−4.968

6.373

0.4360

−0.661

1.201

0.5824

Ref.

1.028

0.994

0.3017

0.343

2.981

0.9085

 Female

1.003

3.743

0.7888

0.050

1.089

0.9634

Ref.

1.908

1.256

0.1292

−3.308

4.865

0.4968

Blood pressure

Age

 19~ 44

9.081

5.089

0.0747

−0.032

1.029

0.9751

Ref.

0.639

0.893

0.4741

1.560

2.646

0.5556

 45~ 64

−4.007

5.626

0.4767

−2.552

1.779

0.1522

Ref.

−3.081

2.075

0.1382

−1.728

8.439

0.8378

 64<

−12.387

20.182

0.5417

5.314

5.101

0.3017

Ref.

−2.610

6.749

0.7003

22.083

20.395

0.2833

Gender

 Male

−12.655

7.995

0.1139

2.073

1.497

0.1666

Ref.

−0.438

1.239

0.7239

2.575

3.522

0.4649

 Female

4.899

3.870

0.2060

−2.082

1.122

0.0638

Ref.

− 0.001

1.294

0.9996

3.303

5.030

0.5116

Fasting glucose

Age

 19~ 44

−3.880

7.421

0.6012

1.190

1.494

0.4261

Ref.

1.333

1.299

0.3050

17.139

3.859

<.0001

 45~ 64

5.895

5.216

0.2591

1.833

1.648

0.2665

Ref.

−2.049

1.920

0.2865

14.249

7.817

0.0690

 64<

13.834

18.440

0.4561

−0.592

4.660

0.8994

Ref.

1.248

6.166

0.8403

3.026

18.633

0.8715

Gender

 Male

0.545

11.505

0.9623

3.968

2.146

0.0649

Ref.

−0.335

1.778

0.8506

21.236

5.066

<.0001

 Female

3.278

3.480

0.3466

0.346

1.006

0.7307

Ref.

1.431

1.163

0.2187

5.173

4.524

0.2532

  1. aModel is adjusted by age, gender, education level, marital status, household income level, region, occupation, alcohol consumption, smoking, walking activity and stress level