Parathyroid Hormone and Subclinical Cerebrovascular Disease: The Atherosclerosis Risk in Communities Brain Magnetic Resonance Imaging Study.

Parathyroid Hormone and Subclinical Cerebrovascular Disease: The Atherosclerosis Risk in Communities Brain Magnetic Resonance Imaging Study.

Korada Sai Krishna C; Zhao Di; Gottesman Rebecca F; Guallar Eliseo; Lutsey Pamela L; Alonso Alvaro; Sharrett A Richey; Post Wendy S; Reis Jared P; Mosley Thomas H; Michos Erin D

Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association

2016

2016-04

BACKGROUND: Elevated parathyroid hormone (PTH) levels have been associated with cardiovascular disease risk factors and events. We hypothesized that elevated PTH levels would also be associated with subclinical cerebrovascular disease. We examined the relationship between elevated PTH level and white matter hyperintensities (WMHs) and subclinical infarcts measured on brain magnetic resonance imaging (MRI). METHODS: PTH was measured at baseline (1993-1994) among participants free of prior clinical stroke who underwent a brain MRI at baseline (n = 1703) and a second brain MRI 10 years later (n = 948). PTH levels of 65 pg/mL or higher were considered elevated (n = 204). Participants who did not return for a follow-up MRI had, at baseline, higher PTH and a greater prevalence of cardiovascular risk factors (P \textless .05 for all); therefore, multiple imputation was used. The cross-sectional and prospective associations of PTH levels with WMH and MRI-defined infarcts (and their progression) were investigated using multivariable regression models. RESULTS: At baseline, the participants had a mean age of 62 years and were 60% female and 49% black. Cross-sectionally, after adjusting for demographic and lifestyle factors, elevated PTH level was associated with higher WMH score (beta = .19, 95% confidence interval [CI] .04-.35) and increased odds of prevalent infarcts (odds ratio 1.56, 95% CI 1.02-2.36). Results were attenuated after adjustment for potential mediators of this association (i.e., hypertension). No prospective associations were found between PTH and incident infarcts or change in estimated WMH volume, although estimates were imprecise. CONCLUSIONS: Although associated cross-sectionally, we did not confirm any association between elevated PTH level and progression of cerebrovascular changes on brain MRIs obtained 10 years apart. The relationship of PTH with subclinical brain disease warrants further study.

*Magnetic Resonance Imaging; Brain; Brain Diseases; Brain Diseases – Complications; brain MRI; Brain/*diagnostic imaging; cerebrovascular disease; Cerebrovascular Disorders; Cerebrovascular Disorders – Blood; Cerebrovascular Disorders/*blood/*diagnostic imaging; Cohort Studies; Computer Assisted; Computer-Assisted; Cross Sectional Studies; Cross-Sectional Studies; Female; Funding Source; Human; Humans; Image Processing; Leukoencephalopathies/complications/diagnostic imaging; Magnetic Resonance Imaging; Male; Middle Age; Middle Aged; Parathyroid hormone; Parathyroid Hormone/*blood; Parathyroid Hormones – Blood; Prospective Studies; subclinical brain infarcts; white matter hyperintensities

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