Table 2.

Thirty-day outcomes of patients discharged home from the emergency department (ED) with AKI

OutcomePatients Discharged Home from the ED with AKI, n (%)a
All Patients (n=6346)AKI Stageb
1 (n=6012)2 (n=290)3 (n=44)
All-cause mortality149 (2)127 (2)15 (5)7 (16)
Receipt of hospital-based acute dialysis22 (0.3)Not reported≤5 (≤2)≤5 (≤11)
At least one hospitalization1032 (16)956 (16)62 (21)14 (32)
At least one outpatient
 Physician clinic visitc4287 (68)4062 (68)197 (68)28 (64)
 Serum creatinine test1446 (23)1339 (22)89 (31)18 (41)
 Urine test for proteindNot reported713 (12)41 (14)≤5 (≤11)
Total health care costs, $e
 Mean (SD)3522 (7079)3499 (7135)3856 (6065)4429 (5454)
 Median (interquartile range)1172 (661–3020)1164 (657–2955)1342 (749–4372)1748 (699–6478)
  • a Reported as n (%) unless otherwise noted. To comply with privacy regulations for minimizing the chance of patient reidentification, numbers of patients were suppressed in five or fewer patients. The total number of patients was not reported if there were other calculations that could result in the reidentification of five or fewer patients.

  • b AKI stage 1, evidence of a relative increase in serum creatinine value of ≥50% to <100% or ≥0.3 mg/dl from baseline; stage 2, evidence of a relative increase in serum creatinine value of ≥100% to <200% from baseline; and stage 3, evidence of a relative increase in serum creatinine value of >200% from baseline or an absolute increase in serum creatinine value to ≥4 mg/dl or the initiation of dialysis.

  • c Seen by any one of the following physicians as outpatient: family medicine, internal medicine, nephrology, or urology.

  • d Urine protein tests included any one of dipstick, protein, or albumin-to-creatinine ratio.

  • e Reported in Canadian dollars, adjusted for inflation to 2013.