Table 3.

Baseline characteristics of a cohort of patients hospitalized in Alberta, Canada between 2005 and 2014 with severe AKI according to whether they received follow-up with a nephrologist within 1 year of hospital discharge

CharacteristicFull Cohort, n=2076Nephrologist Follow-Up, n=500No Nephrologist Follow-Up, n=1576P Value
Demographics
 Age mean (SD), yr65 (16)64 (16)65 (16)0.07
 Sex (women), n (%)891 (43)161 (32)730 (46)<0.001
 Low income, n (%)620 (30)144 (29)476 (30)0.29
 Aboriginal75 (4)18 (4)57 (4)0.99
Laboratory data
 Baseline eGFR, ml/min per 1.73 m2, mean (SD)67 (31)46 (30)74 (27)<0.001
 Preexisting CKD, n (%)824 (40)356 (71)468 (30)<0.001
 Discharge creatinine, μmol/L, mean (SD)155 (114)268 (142)123 (80)<0.001
 Recovery of kidney function,a n (%)<0.001
  Full recovery1004 (48)170 (34)834 (53)
  20%–60% above baseline creatinine395 (19)83 (17)312 (20)
  >60% above baseline creatinine677 (33)247 (49)430 (27)
Comorbidities, n (%)
 Diabetes mellitus805 (39)236 (47)569 (36)<0.001
 Cancer372 (18)77 (15)295 (19)0.09
 Congestive heart failure388 (19)113 (23)275 (17)0.01
 Metastatic solid tumor85 (4)12 (2)73 (5)0.03
 Myocardial infarction267 (13)62 (12)205 (13)0.72
 Mild liver disease97 (5)20 (4)77 (5)0.41
 Moderate/severe liver disease39 (2)6 (1)33 (2)0.20
 Peripheral vascular disease287 (14)49 (10)238 (15)0.003
 Rheumatologic disease87 (4)26 (5)61 (4)0.20
 Hypertension277 (13)69 (14)208 (13)0.73
Procedures in hospital, n (%)
 Mechanical ventilation503 (24)61 (12)442 (28)<0.001
 Dialysis429 (21)76 (15)353 (22)0.38
Physician contacts
 Nephrology visit in year before admission271 (13)211 (42)60 (4)<0.001
 Nephrology consult during index admission774 (37)321 (64)453 (29)<0.001
 No. of non-nephrology physicians seen in year before admission, median (IQR)4 (2–5)4 (2–5)4 (2–5)0.13
  • IQR, interquartile range.

  • a On the basis of discharge ratio of last creatinine before discharge and baseline creatinine before hospitalization.