title: Cardiovascular risk stratification with plasma B-type natriuretic peptide levels in a community-based hypertensive cohort.
abstract: Few reports have examined the utility of plasma B-type natriuretic peptide (BNP) testing for cardiovascular (CV) risk stratification in real-world hypertensive subjects. Subjects of the study were community-based hypertensive patients (n = 5,865). The CV event rate within each BNP quartile was estimated, and a Cox regression model was used to determine the relative hazard ratio (HR) among the quartiles. Furthermore, to determine the usefulness of BNP as a biomarker in combination with the Framingham risk score (FRS), the predictive abilities in terms of area under the curve of receiver operating characteristic analysis, net reclassification improvement, and integrated discrimination improvement indices were determined. The mean follow-up duration was 5.6 years. The highest quartile showed a significantly higher rate of CV events compared with the lower quartiles (p <0.001). After adjustment for established CV risk factors, the HR for CV events increased significantly according to the quartile (p value for trend <0.03), and the HR for the highest quartile was significantly elevated compared with the lowest quartile (HR 1.59, 95% confidence interval 1.16 to 2.19). The predictive abilities of BNP in terms of sensitivity and specificity for CV events were comparable with those of FRS. When BNP was added to an FRS-only model, the predictive abilities in terms of area under receiver operating characteristic curve, net reclassification improvement, and integrated discrimination improvement were significantly increased (all; p <0.001). Elevated BNP levels are thus a useful biomarker for CV risk stratification in unselected real-world hypertensive subjects. Adding BNP to an established CV risk score improves the predictive ability in this cohort.
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan. Electronic address: s_kenyu@mtf.biglobe.ne.jp.
authors.forename: Kenyu
authors.initials: K
authors.lastname: Sato
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Toshie
authors.initials: T
authors.lastname: Segawa
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Fumitaka
authors.initials: F
authors.lastname: Tanaka
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Hygiene and Preventive Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Kozo
authors.initials: K
authors.lastname: Tanno
authors.affiliation: Department of Hygiene and Preventive Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Ohsawa
authors.affiliation: Department of Hygiene and Preventive Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Onoda
authors.affiliation: Department of Hygiene and Preventive Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Itai
authors.affiliation: Department of Hygiene and Preventive Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Kiyomi
authors.initials: K
authors.lastname: Sakata
authors.affiliation: Department of Neurosurgery, Iwate Medical University, Morioka, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Omama
authors.affiliation: Department of Neurosurgery, Iwate Medical University, Morioka, Japan.
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Ogasawara
authors.affiliation: Department of Neurology, Iwate Medical University, Morioka, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ishibashi
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Makita
authors.affiliation: The First Institute of Health Service, Japan Anti-Tuberculosis Association, Tokyo, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Okayama
authors.affiliation: Department of Internal Medicine, Iwate Medical University, Morioka, Japan.
authors.forename: Motoyuki
authors.initials: M
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood*; D002318:Cardiovascular Diseases / Q000097:blood*; D015331:Cohort Studies; D005500:Follow-Up Studies; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000150:complications; D007564:Japan; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D011446:Prospective Studies; D012372:ROC Curve; D018570:Risk Assessment; D016019:Survival Analysis
chemical_list: D015415:Biomarkers; D020097:Natriuretic Peptide, Brain