A Significant Association of Upper Limb Muscle Strength with Thyroid Function in Overweight and Obese Population: A Study of the Sixth Korea National Health and Nutrition Examination Survey (KNHANES 2014-2015)

Table 2

Multivariate regression analyses of factors associated with upper limb muscle strength (weighted).

	FT4 β (95% CI)	-value	TSH β (95% CI)	-value	LOG_TSH β (95% CI)	-value
Model 1	12.84 (10.42,15.26)	<0.0001	−0.37 (−0.61, −0.14))	0.0018	−0.95 (−1.58, −0.33)	0.0030
Model 2	0.02 (−1.56, 1.60)	0.9791	−0.03 (−0.17, 0.10)	0.6297	−0.05 (−0.44, 0.35)	0.8087
Model 3	0.31 (−1.31, 1.93)	0.7108	−0.02 (−0.16, 0.12)	0.7864	−0.05 (−0.47, 0.37)	0.8103
Model 4	0.27 (−1.35, 1.89)	0.7450	−0.01 (−0.15, 0.13)	0.9054	−0.02 (−0.44, 0.40)	0.9241

Model 1: crude. Model 2: adjustment for age, sex, BMI. Model 3: model 2 + smoking, drinking, diabetes. Model 4: model 3 + exercise. CI, confidential interval. FT4, free thyroxine. TSH, thyrotropin.