NT-proBNP improves prediction of cardiorenal complications in type 2 diabetes: the Hong Kong Diabetes Biobank
Authors:
Ronald C. W. Ma, Claudia H. T. Tam, Yong Hou, Eric S. H. Lau, Risa Ozaki, Juliana N. M. Lui, Elaine Chow, Alice P. S. Kong, Chuiguo Huang, Alex C. W. Ng, Erik G. Fung, Andrea O. Y. Luk, Wing Yee So, Cadmon K. P. Lim, Juliana C. N. Chan, for the Hong Kong Diabetes Biobank Study Group
N-terminal pro B-type natriuretic peptide (NT-proBNP) is a natriuretic peptide that is strongly associated with congestive heart failure (CHF). The utility of NT-proBNP for prediction of cardiovascular events and renal endpoints, compared with clinical risk factors, has not been evaluated in detail. We hypothesise that NT-proBNP can improve risk stratification and prediction of cardiorenal events in type 2 diabetes, beyond that provided by clinical risk factors.
Methods
NT-proBNP was measured in 1993 samples from the Hong Kong Diabetes Biobank, a multicentre prospective diabetes cohort and biobank. A cut-off of ≥125 pg/ml was used to define elevated NT-proBNP. Associations between elevated NT-proBNP and incident cardiovascular and renal endpoints were examined using Cox regression, adjusted for sex, age and duration of diabetes, as well as other covariates. Prognostic and incremental predictive values of NT-proBNP in diabetes cardiorenal complications, compared with those of the Joint Asia Diabetes Evaluation risk equations for CHD, CHF and kidney failure, were evaluated using the concordance index (C index), net reclassification improvement index, integrated discrimination improvement index and relative integrated discrimination improvement index.
Results
A total of 24.7% of participants had elevated NT-proBNP. Participants with elevated NT-proBNP at baseline had a more adverse cardiometabolic profile, with 2–4-fold higher frequency of complications at baseline. Adjusting for age at baseline, sex and duration of diabetes, elevated NT-proBNP was associated with incident atrial fibrillation (HR 4.64 [95% CI 2.44, 8.85]), CHD (HR 4.21 [2.46, 7.21]), CVD (HR 3.32 [2.20, 5.01]) and CHF (HR 4.18 [2.18, 8.03]; all p<0.001). All these associations remained significant after further adjustment for additional covariates. Elevated NT-proBNP had good discriminative ability for various cardiorenal endpoints, with C index of 0.83 (95% CI 0.76, 0.90) for CHD, 0.88 (0.81, 0.94) for atrial fibrillation, 0.89 (0.83, 0.95) for CHF, 0.81 (0.77, 0.84) for 40% drop in eGFR and 0.88 (0.84, 0.92) for kidney failure. Models incorporating NT-proBNP had improved prediction compared with established clinical risk models. Sensitivity analyses including alternative cut-off of NT-proBNP, as well as use of other risk engines of CHD, yielded similar results.
Conclusions/interpretation
NT-proBNP demonstrated a promising ability to serve as a prognostic marker for a variety of cardiorenal complications in type 2 diabetes. Considering NT-proBNP in clinical assessments could potentially help identify high-risk individuals who may benefit from more intensive therapies.
NT-proBNP improves prediction of cardiorenal complications in type 2 diabetes: the Hong Kong Diabetes Biobank
Authors
Ronald C. W. Ma Claudia H. T. Tam Yong Hou Eric S. H. Lau Risa Ozaki Juliana N. M. Lui Elaine Chow Alice P. S. Kong Chuiguo Huang Alex C. W. Ng Erik G. Fung Andrea O. Y. Luk Wing Yee So Cadmon K. P. Lim Juliana C. N. Chan for the Hong Kong Diabetes Biobank Study Group
Menopause can have a significant impact on the body, with effects ranging beyond the endocrine and reproductive systems. Learn about the broader systemic effects of menopause, so you can help patients in your clinics through the transition.
Growing numbers of young people are using e-cigarettes, despite warnings of respiratory effects and addiction. How can doctors tackle the epidemic, and what health effects should you prepare to manage in your clinics?
Watch it live: Wednesday 29th January, 18:00-19:30 CET
Frailty has a significant impact on health and wellbeing, especially in older adults. Our experts explain the factors that contribute to the development of frailty and how you can manage the condition and reduce the risk of disability, dependency, and mortality in your patients.
Improve your ECG interpretation skills with this comprehensive, rapid, interactive course. Expert advice provides detailed feedback as you work through 50 ECGs covering the most common cardiac presentations to ensure your practice stays up to date.