Background:
Dysfunction of the thyroid gland has profound effects on the cardiovascular
system.
Objective:
We aimed to explore the relation of serum thyroid peroxidase antibody (TPO-Ab), as a
marker of thyroid autoimmunity with incident hypertension among a euthyroid population.
Methods:
A total of 3681 participants (1647 men) entered the study. Multivariate Cox proportional
hazard models were conducted to estimate the association between TPO-Ab and incident hypertension.
Results:
The mean age (standard deviation) of the participants was 37.5 (12.8) years. During a median
follow-up of 12.2 years, 511 men and 519 women developed hypertension. The multivariable hazard
ratios (HRs) and related 95% confidence intervals (CIs) of 1-unit increase in natural logarithm (ln) of
TPO-Ab for incident hypertension were 1.09 (1.00-1.19), 1.03 (0.97-1.10), and 1.05 (1.00-1.11) for
men, women, and total population, respectively. Moreover, considering the TPO-Ab status as a categorical
variable (i.e. TPO-Ab positive or TPO-Ab negative), the multivariate-adjusted HRs (95% CIs)
of TPO-Ab positivity for incident hypertension, were 1.33 (0.95-1.85), 1.12 (0.86-1.45) and 1.19 (0.97-
1.46) for men, women, and total population, respectively.
Conclusion:
Elevated serum TPO-Ab level can contribute to the development of hypertension among
euthyroid men during a long follow-up; suggesting a role for thyroid autoimmunity.