Growth Hormone Concentration and Risk of All-Cause and Cardiovascular Mortality: the REasons for Geographic and Racial Disparities in Stroke (REGARDS) Study.

Nicholas Wettersten,Rohit Mital,Mary Cushman,George Howard,Suzanne E. Judd,Virginia J. Howard,Monika M. Safford,Oliver Hartmann,Andreas Bergmann,Joachim Struck,Alan Maisel

Atherosclerosis（2022）SCI 2区SCI 3区

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Abstract

Background and aims: Identifying individuals at elevated risk for mortality, especially from cardiovascular dis-ease, may help guide testing and treatment. Risk factors for mortality differ by sex and race. We investigated the association of growth hormone (GH) with all-cause and cardiovascular mortality in a racially diverse cohort in the United States.Methods: Among an age, sex and race stratified subgroup of 1046 Black and White participants from the REasons for Geographic And Racial Disparities in Stroke (REGARDS) study, 881 had GH available; values were log2 transformed. Associations with all-cause and cardiovascular mortality were assessed in the whole subgroup, and by sex and race, using multivariable Cox-proportional hazard models and C-index.Results: The mean age was 67.4 years, 51.1% were women, and 50.2% were Black participants. The median GH was 280 (interquartile range 79-838) ng/L. There were 237 deaths and 74 cardiovascular deaths over a mean of 8.0 years. In multivariable Cox analysis, GH was associated with higher risk of all-cause mortality per doubling (hazard ratio [HR] 1.17, 95% confidence interval [CI] 1.09-1.25) and cardiovascular mortality (HR 1.21, 95% CI 1.06-1.37). The association did not differ by sex or race (interaction p > 0.05). The addition of GH to a model of clinical variables significantly improved the C-index compared to clinical model alone for all-cause and car-diovascular death.Conclusions: Higher fasting GH was associated with higher risk of all-cause and cardiovascular mortality and improved risk prediction, regardless of sex or race.

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Cardiovascular disease,Prediction,Growth hormone,Biomarker

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