Clinical Profile, Need for Dialysis and Mortality of Community Acquired versus Hospital Acquired Acute Kidney Injury

Introduction: Occurrence of Acute Kidney Injury (AKI) is high in hospitalised and critically ill patients. Most of the cases reported by the developed countries are Hospital Acquired Acute Kidney Injury (HA-AKI). AKI is a major medical complication in the developing world also and is due to predominantly community acquired causes, where the epidemiology differs from that in developed countries. Many studies have reported that Community Acquired Acute Kidney Injury (CA-AKI) and HA-AKI differ in mortality, need for renal replacement and residual renal injury. Aim: To know the difference in need for renal replacement therapy and in-hospital mortality between patients diagnosed with CA-AKI and HA-AKI using Kidney Disease: Improving Global Outcomes (KDIGO) criteria. Materials and Methods: A prospective cohort study was conducted from January 2018-December 2018 after obtaining Institutional Ethical Clearance by comparing 50 cases of CA-AKI and 50 cases of HA-AKI admitted by the General Medicine Department as per the inclusion and exclusion criteria. Serum Creatinine (S.Cr) at admission, after 48 hours and at the time of discharge were measured. Serial urine output measurements were done. Need for dialysis was noted in both the groups. Both groups were compared based on need for dialysis, difference in mortality and residual renal injury at the time of discharge. Chi-square and student t-tests were applied respectively and p-value ≤0.05 was considered as significant. Statistical Package for Social Sciences (SPSS) version 17.0 was used for data entry and analysis. Results: The CA-AKI and HA-AKI groups were comparable in age and gender but differed in some co-morbidities. CA-AKI group had underlying hepatobiliary disorders and Non steroidal Anti-Inflammatory Drug (NSAID) abuse more often than HAAKI group. There was a significant reduction in S.Cr over the duration of hospital stay in CA-AKI (mean S.Cr at admission was 4.85 mg/dL, at 48 hours 2.05 mg/dL and at discharge 1.20 mg/dL). S.Cr increased after 48 hours of admission from baseline and declined later in HA-AKI but did not reach baseline in many patients in comparison to CA-AKI group (mean S.Cr at admission was 1.10 mg/dL, at 48 hours 2.38 mg/dL, at discharge 1.57 mg/dL). The highest stage of AKI was stage 3 in CA-AKI group (22 vs 11 of HA-AKI). HA-AKI group had more number of patients in stage 2 AKI (26 vs 18 of CA-AKI). There was no significant difference in mortality and requirement of haemodialysis between CA-AKI and HA-AKI groups. Conclusion: There was no difference between the two groups in terms of mortality and need for renal replacement therapy but there was significant residual renal injury in HA-AKI group