Associations of pentraxin-3 with cardiovascular events, incident heart failure, and mortality among persons with coronary heart disease: data from the Heart and Soul Study.

BACKGROUND: Pentraxin-3 (PTX3) is an inflammatory marker thought to be more specific to vascular inflammation than C-reactive protein (CRP). Whether PTX3 is independently associated with adverse events among persons with stable coronary heart disease (CHD), independently of CRP, and whether kidney dysfunction influences these associations are not known.
METHODS: We evaluated the associations of baseline PTX3 levels with all-cause mortality, cardiovascular (CV) events (myocardial infarction, stroke, or CHD death), and incident heart failure (HF) during 37 months among ambulatory persons with stable CHD participating in the Heart and Soul Study. Cox proportional hazards models were adjusted for age, sex, race, hypertension, diabetes, smoking, and CRP.
RESULTS: Among 986 persons with stable CHD, each 1 unit increase in log PTX3 at baseline was associated with an 80% increased risk of all-cause mortality (hazard ratio [HR] 1.8, 95% CI 1.5-2.1), a 50% increased risk of CV events (HR 1.5, 95% CI, 1.2-1.9), and an 80% greater risk of incident HF (HR 1.8, 95% CI, 1.3-2.5). Further adjustment for estimated glomerular filtration rate (eGFR) attenuated these associations to 1.6 (1.3-1.9) for mortality, 1.3 (1.0-1.6) for CV events and 1.5 (1.1-2.1) for incident HF. Stratification by eGFR >60 mL/min per 1.73m(2) or <60 mL/min per 1.73m(2) did not affect these associations (P interaction > .3 for all outcomes).
CONCLUSIONS: Among persons with stable CHD, higher PTX3 concentrations were associated with increased risk for all-cause mortality, CV events, and incident HF independently of systemic inflammation. Adjustment for eGFR modestly attenuated these associations, suggesting that future studies of PTX3 should adjust for kidney function.