{'fraction_non_alphanumeric': 0.028912633563796353, 'fraction_numerical': 0.026398491514770583, 'mean_word_length': 4.9182156133829, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 1, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Mild acute kidney injury is associated with increased mortality after cardiac surgery in patients with eGFR < 60 mL/min/1.73 m2

Background: A small increase in serum creatinine after cardiac surgery has been associated with increased mortality. However, it is unclear whether this association varies with baseline renal function. Methods: We retrospectively reviewed data on 1359 patients who underwent cardiac surgery over a 4-year period in two tertiary care hospitals including demographic data, comorbid conditions, and intra- and postoperative complications using a standardized form. We followed patients for 90 days postoperatively and death rates and length of hospital stay were noted. Results: The incidence of acute kidney injury (AKI) after cardiac surgery was 40.2%. Patients were grouped into terciles based on change in serum creatinine. Kaplan–Meier survival analysis and Cox regression analysis showed that the development of AKI with a small increase in serum creatinine of more than 0.3 mg/dL from baseline (tercile 3) was associated with a higher risk of mortality within 90 days and 7 days longer hospitalization following a cardiac surgery. Stratified analysis showed that only patients with baseline eGFR < 60 mL/min/1.73 m2 had fivefold higher mortality with rise of serum creatinine >0.3 mg/dL. Conclusions: Patients with baseline eGFR < 60 mL/min/1.73 m2 had increased risk of mortality after cardiac surgery with a small increase in serum creatinine whereas a similar increase in serum creatinine in those with eGFR ≥ 60 mL/min/1.73 m2 did not increase mortality.