Table 4 Relative risk of Hashimoto thyroiditis (HT) diagnosed using ultrasonography according to quartiles of serum magnesium as determined using multiple logistic regression analyses.

From: Severely low serum magnesium is associated with increased risks of positive anti-thyroglobulin antibody and hypothyroidism: A cross-sectional study

Serum magnesium (mmol/L) Model 1a Model 2b Model 3c Model 4d
OR (95% CI) p OR (95% CI) p OR (95% CI) p OR (95% CI) p
HT using ultrasonography
Serum magnesium   0.002   0.002   0.003   0.001
≤0.55 2.748 (1.489–5.070) 0.001 2.847 (1.533–5.287) 0.001 2.763 (1.470–5.193) 0.002 2.944 (1.590–5.450) 0.001
0.551–0.85 0.884 (0.568–1.376) 0.585 0.916 (0.588–1.428) 0.700 0.900 (0.575–1.408) 0.644 0.871 (0.559–1.355) 0.539
0.851–1.15 1.00   1.00   1.00   1.00  
>1.15 0.806 (0.472–1.378) 0.430 0.785 (0.457–1.349) 0.381 0.755 (0.434–1.313) 0.320 0.832 (0.487–1.420) 0.499
  1. HT: Hashimoto thyroiditis; OR: odds ratio; CI: confidence interval.
  2. aModel 1: adjusted for age, sex, smoking status, and serum iodine concentration;
  3. bModel 2: additionally adjusted for body mass index;
  4. cModel 3: adjusted for all covariates in model 2 as well as income and education;
  5. dModel 4: adjusted for all covariates in model 1, but age was used as a classification variable according to youth, middle age, and old age (as shown in Table 1).
  6. Regression analyses using the forward method, backward method, and all arguments simultaneously were performed; the results were similar.
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