Table 2.

Comparison of 5-yr hospitalizations, emergency room visits, and physician visits between patients with versus without AKI

AKI DefinitionHospitalizationsEmergency Room VisitsOutpatient Physician Visits
# Visits# Intensive Care AdmissionsEvents/Person Year (95% CI)# VisitsEvents/Person Year (95% CI)# Visits# Nephrology VisitsEvents/Person Year (95% CI)
Serum creatinine only
 No AKI3183415 (13%)0.52 (0.50 to 0.53)56500.91 (0.89 to 0.94)34937295 (0.8%)5.65 (5.60 to 5.71)
 AKI1033134 (13%)0.73 (0.68 to 0.77)a14221.00 (0.95 to 1.06)a116831300 (11%)8.25 (8.10 to 8.40)a
Serum creatinine or urine output
 No AKI3165414 (13%)0.52 (0.50 to 0.53)56930.93 (0.90 to 0.95)35111297 (0.8%)5.72 (5.66 to 5.78)
 AKI1186158 (13%)0.71 (0.67 to 0.75)a16400.98 (0.93 to 1.02)a130231308 (10%)7.75 (7.61 to 7.88)a
  • 95% CI, 95% confidence interval.

  • a P<0.001 for comparison between AKI and non-AKI by univariable Poisson regression.