Table 2.

Univariate linear regression models of serum selenium and other risk factors with grip strength

Characteristic	Beta	SE	P
Age (years)	−0.237	0.022	< 0.0001
Race (white)	−1.947	0.419	< 0.0001
Education < 12 years	−0.286	0.396	0.47
Current smokers (%)	1.545	0.622	0.01
Body mass index (kg/m2)1
< 18.5	−2.559	1.098	0.02
25.0–29.9	1.272	0.462	0.006
⩾ 30	2.620	0.460	< 0.0001
MMSE	−1.742	0.506	0.0006
Serum selenium (μmol/L)	2.280	0.799	0.0045
Interleukin-6 (pg/mL)	−0.136	0.081	0.094
Hypertension	0.827	0.383	0.03
Coronary heart disease	−0.332	0.450	0.46
Congestive heart failure	−1.747	0.617	0.005
Peripheral artery disease	−0.351	0.468	0.45
Stroke	−1.046	0.815	0.2
Diabetes mellitus	0.567	0.504	0.26
Chronic obstructive pulmonary disease	0.347	0.417	0.40
Depression	−1.827	0.503	0.0003
Cancer	−0.732	0.599	0.22
Osteoarthritis	0.197	0.381	0.61

¹Reference category is BMI of 18.5–24.9 kg/m².