“John Henryism” and blood pressure in a Dutch population.

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Abstract
In a stratified, random sample of 100 men and 100 women, aged 20–59 years, residing in Zutphen, the Netherlands, the hypothesis was tested that high scores on “John Henryism,” a strong behavioral predisposition to cope actively with psychosocial environmental stressors, would be associated with higher blood pressure, especially among persons of lower education. In univariate analyses higher scores on John Henryism were strongly associated with higher blood pressures in men. Among women there was only an association of John Henryism and systolic blood pressure, but this association was no longer statistically significant after adjustment for potential confounders such as age, alcohol consumption, physical activity, Quetelet Index, and education. Among men, however, the association between John Henryism and systolic blood pressure remained statistically significant after adjustment for potential confounders. The association between John Henryism and blood pressure was more pronounced for men of low educational background.