Table 2 Simple and multivariate linear regression analyses of thyroid volume* on determinants

Simple linear regression

Age (yr)

0.065

0.000-0.003

.023

BMI (kg/m²)

0.149

0.012-0.026

.001

TSH (mU/L)

−0.136

−0.024-–0.010

.001

*Serum selenium (μg/L)

0.001

−0.059-0.061

.977

Smoking

0.112

0.055-0.164

.001

TPOAb positive

0.165

0.137-0.278

.001

TgAb positive

0.146

0.118-0.264

.001

Antibody positive

0.163

0.118-0.241

.001

Nodules

0.219

0.173-0.289

.001

Multivariate linear regression

BMI (kg/m²)

0.126

0.009-0.023

.001

TSH (mU/L)

−0.176

−0.029-–0.015

.001

Smoking

0.120

0.064-0.169

.001

TPOAb positive

0.139

0.098-0.253

.001

TgAb positive

0.106

0.059-0.218

.001

Nodules

0.218

0.174-0.285

.001