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(Hypertension. 2004;44:859.)
© 2004 American Heart Association, Inc.

Scientific Contributions

Inflammation, Abdominal Obesity, and Smoking as Predictors of Hypertension

Leo Niskanen; David E. Laaksonen; Kristiina Nyyssönen; Kari Punnonen; Veli-Pekka Valkonen; Ricardo Fuentes; Tomi-Pekka Tuomainen; Riitta Salonen; Jukka T. Salonen

From the Departments of Medicine (L.N., D.E.L.) and Clinical Chemistry (K.P.), Kuopio University Hospital, Finland; Research Institute of Public Health (K.N., V-P.V., T-P.T., J.T.S.) and Department of Public Health and General Practice (R.S.), University of Kuopio, Finland; and Jurilab Ltd (R.F., J.T.S.), Kuopio, Finland.

Reprint requests to Kristiina Nyyssönen, PhD, Research Institute of Public Health, University of Kuopio, PO Box 1627, FIN-70211 Kuopio, Finland. E-mail Kristiina.Nyyssonen{at}uku.fi

Development of hypertension has been linked to chronic low-grade inflammation. However, it is not known whether this connection is mediated by features of the metabolic syndrome or smoking, or their changes, which themselves have been linked to inflammation. We studied the predictive value of highly sensitive C-reactive protein (hs-CRP), smoking, and abdominal obesity to the development of hypertension in an 11-year follow-up of a population-based study cohort comprising 379 middle-aged normotensive men. During the follow-up, 124 men (33%) developed hypertension. Men with hs-CRP 3.0 mg/L were 2.8x (95% confidence interval, 1.2 to 6.6) more likely to develop hypertension than with hs-CRP <1.0 mg/L even after adjustment for features of the metabolic syndrome, lifestyle factors, and their changes. Cigarette smoking was also associated with development of hypertension independently of inflammation and other confounders. Waist girth increased more in men who quit smoking than in other men. An increase in waist girth during follow-up strongly predicted incident hypertension. The decrease in smoking was not associated with a lower risk of hypertension in age-adjusted analyses. Hypertension is preceded by low-grade chronic inflammation in middle-aged white men independently of smoking or features of the metabolic syndrome. Furthermore, smoking may be a risk factor for hypertension. Although stopping smoking is beneficial with respect to health outcomes, the subsequent increase in weight and waist girth associated with smoking cessation may offset the decrease in the risk of hypertension that one may otherwise expect.

Key Words: obesity • smoking • prospective studies • insulin resistance

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