Published Online
on October 31, 2002

A more recent version of this article appeared on December 1, 2002

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Submitted on June 5, 2002
Accepted on June 17, 2002

Long-Term Effects of Inflammation-Sensitive Plasma Proteins and Systolic Blood Pressure on Incidence of Stroke

G. Engström MD, PhD^*; P. Lind MD; B. Hedblad MD, PhD; L. Stavenow MD, PhD; L. Janzon MD, PhD; and F. Lindgärde MD, PhD

From the Departments of Community Medicine (G.E., B.H.,L.J.), Internal Medicine (P.L., L.S.), and Vascular Diseases (F.L.), Malmö University Hospital, Malmö, Sweden.

^* To whom correspondence should be addressed. E-mail: Gunnar.Engstrom{at}smi.mas.lu.se.

Background and Purpose—The present study investigated the relationships between inflammation-sensitive plasma proteins (ISPs) and systolic blood pressure (SBP), as well as the joint long-term effects of ISP and SBP on incidence of stroke.

Methods—BP and 5 ISPs (fibrinogen, 1-antitrypsin, haptoglobin, ceruloplasmin, orosomucoid) were assessed in 6071 healthy men 28 to 61 years of age. All-cause mortality and incidence of stroke were monitored over a mean follow-up of 18.7 years in men defined by SBP (<120, 120 to 139, 140 mm Hg) and ISP (0 to 1 or 2 to 5 ISPs in the top quartile).

Results—SBP and diastolic BP were significantly and positively associated with the number of ISPs in the top quartile. As expected, elevated SBP was associated with an increased incidence of stroke. Among men with SBP 140 mm Hg, there were, however, significant differences between those with high and low ISP levels. After risk factor adjustment, men with SBP 140 mm Hg and high ISP levels had a relative risk of stroke of 4.3 (95% CI, 2.3 to 7.8) compared with men with SBP <120 mm Hg and low ISP levels. In the absence of high ISP levels, the risk associated with SBP 140 was 2.5 (95% CI,1.4 to 4.6). Men with high ISP levels had a significantly increased risk of stroke also after exclusion of the events from the first 10 years of follow-up.

Conclusions—High ISP levels are associated with elevated BP. These proteins are associated with an increased risk of stroke among men with high BP and provide information on stroke risk even after many years of follow-up.

Key words: blood pressure • epidemiology • inflammation

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