INCIDENCE AND MORTALITY RISK OF AKD AND AKI IN THE PRIMARY CARE

Abstract

Objective: Objective: The aim of the present study was to assess the impact of hypertension in the incidence of Acute Kidney Damage and Acute Kidney Injury episodes in the community, defined by changes in serum creatinine and temporal window. Design and method: The study analyzed the EHR of a community of 1,863,731 adult subjects >23 years of age with serum creatinine before, during and after the AKD episode for a variable period of time. eGFR was calculated using the CKD-EPI formula. AKD and AKI were defined according to the harmonized KDIGO criteria (Lameire 2021). The acute event was defined as having occurred when the blood creatinine was at least 150% of the mean of the previous creatinine measurement. AKD is considered to have ended when the creatinine falls to at least the threshold created by the pre-event mean plus half the increment produced during the episode within three months. AKI was defined as a sudden drop in creatinine within seven days. The RIFLE scale was used to classify episodes. HTN was considered when it was recorded in the EHR (CIE9 and 10). Results: During a mean follow-up of 4.8 years, 56,850 episodes of AKD were identified in 47,670 patients. The incidence was 4.49 and 19.0/1000 patients/year in non-CKD and CKD subjects, respectively. Overall, HTN was present in 62.8% of patients, 49,9% among those without CKD before the event and in 92.6% in CKD patients. In patients without CKD, HTN increases the risk of more severe RIFLE class of AKD (Risk 47.4%, Injury 64.1% and Failure 66.0%). The prevalence of HTN in patients with AKI was 76.6% without differences in the RIFLE class (Risk 76.3%, Injury 77.2% and Failure 76.9%). A higher mortality was recorded among the AKI patients. Conclusions: The data from this study reinforce the concept that acute elevations in serum creatinine occurring and managed in the community may pose a health risk and HTN is an important risk factor. Future work should consider how best eAlerts can be utilized, targeted and implemented.