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. 2022 Feb 10;23(1):62.
doi: 10.1186/s12882-022-02696-9.

Nomogram to predict rapid kidney function decline in population at risk of cardiovascular disease

Affiliations

Nomogram to predict rapid kidney function decline in population at risk of cardiovascular disease

Qiuxia Zhang et al. BMC Nephrol. .

Abstract

Background: To develop a reliable model to predict rapid kidney function decline (RKFD) among population at risk of cardiovascular disease.

Methods: In this retrospective study, key monitoring residents including the elderly, and patients with hypertension or diabetes of China National Basic Public Health Service who underwent community annual physical examinations from January 2015 to December 2020 were included. Healthy records were extracted from regional chronic disease management platform. RKFD was defined as the reduction of estimated glomerular filtration rate (eGFR) ≥ 40% during follow-up period. The entire cohort were randomly assigned to a development cohort and a validation cohort in a 2:1 ratio. Cox regression analysis was used to identify the independent predictors. A nomogram was established based on the development cohort. The concordance index (C-index) and calibration plots were calculated. Decision curve analysis was applied to evaluate the clinical utility.

Results: A total of 8455 subjects were included. During the median follow-up period of 3.72 years, the incidence of RKFD was 11.96% (n = 1011), 11.98% (n = 676) and 11.92% (n = 335) in the entire cohort, development cohort and validation cohort, respectively. Age, eGFR, hemoglobin, systolic blood pressure, and diabetes were identified as predictors for RKFD. Good discriminating performance was observed in both the development (C-index, 0.73) and the validation (C-index, 0.71) cohorts, and the AUCs for predicting 5-years RKFD was 0.763 and 0.740 in the development and the validation cohort, respectively. Decision curve analysis further confirmed the clinical utility of the nomogram.

Conclusions: Our nomogram based on five readily accessible variables (age, eGFR, hemoglobin, systolic blood pressure, and diabetes) is a useful tool to identify high risk patients for RKFD among population at risk of cardiovascular disease in primary care. Whereas, further external validations are needed before clinical generalization.

Keywords: Cardiovascular disease; Rapid kidney function decline; Risk prediction model.

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Conflict of interest statement

None of authors declared potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Fig. 1
Fig. 1
Flow chart of study design and participants. eGFR: estimated glomerular filtration rate
Fig. 2
Fig. 2
Nomogram to predict the 5-year risk of rapid kidney function decline (RKFD). To use the nomogram, find the position of each variable on the relative axis, draw a line to the points axis for the number of points, add the points derived from all the variables together, and refer to the total points axis to determine the 5-year of RKFD probabilities. eGFR: estimated glomerular filtration rate, SBP: systolic blood pressure
Fig. 3
Fig. 3
Receiver operating characteristic curves and predictive value validation of the nomogram. The 5-year AUC in the development cohort (A) and in the validation cohort (B). Validity of the predictive value in the development cohort (C) and in the validation cohort (D) of the 5-year CKD probability. AUC: area under the curve
Fig. 4
Fig. 4
Kaplan-Meier curves of incident rapid kidney function decline for patients in the low- and high-risk groups stratified by total score of 150 points calculated from nomogram. Low-risk group (scores≤150), high-risk group (scores>150)

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