Table 1.

Population characteristics by time period and AKI status

CharacteristicPre-CDSS, October 2012–September 2013, n=181,696Post-CDSS October 2013–September 2015, n=346,412
No AKI, n=161,661AKI, n=20,035Total, n=181,696No AKI, n=301,935AKI, n=44,477Total, n=346,412
Age, yr, mean±SD58±2069±1659±2057±2069±1659±20
Women, n (%)94,434 (58.4)9350 (46.7)103,784 (57.1)175,457 (58.1)20,281 (45.6)195,738 (56.5)
Race, n (%)
 Black20,090 (12.4)2742 (13.7)22,832 (12.6)37,657 (12.5)6445 (14.5)44,102 (12.7)
 White136,376 (84.4)16,586 (82.8)152,962 (84.2)252,968 (83.8)36,424 (81.9)289,392 (83.5)
 Other5195 (3.2)707 (3.5)5902 (3.3)11,310 (3.8)1608 (3.6)12,918 (3.7)
Charlson Index
 Mean±SD1.7±2.23.3±2.41.8±2.31.7±2.23.4±2.41.9±2.3
 Median (IQR)1 (0–2)3 (1–5)1 (0–3)1 (0–2)3 (2–5)1 (0–3)
Comorbidities, n (%)
 AMI14,881 (9)3440 (17)18,321 (10)26,886 (9)7334 (16)34,220 (10)
 Diabetes30,005 (19)6135 (31)36,140 (20)55,386 (18)13,184 (30)68,570 (20)
 Diabetes + complications5771 (4)2056 (10)7827 (4)11,799 (4)4973 (11)16,772 (5)
 Hemiplegia or paraplegia2219 (1)351 (2)2570 (1)4211 (1)710 (2)4921 (1)
 Renal disease13,309 (8)8282 (41)21,591 (12)25,247 (8)19,294 (43)44,541 (13)
 Cancer16,915 (10)2396 (12)19,311 (11)32,329 (11)5672 (13)38,001 (11)
 Mild LD3565 (2)1141 (6)4706 (3)6712 (2)2649 (6)9361 (3)
 Moderate/severe LD2029 (1)1026 (5)3055 (2)4057 (1)2389 (5)6446 (2)
 Metastatic cancer7663 (5)1046 (5)8709 (5)13,166 (4)2342 (5)15,508 (4)
 AIDS308 (0)68 (0)376 (0)652 (0)144 (0)796 (0)
 CHF20,249 (13)6969 (35)27,218 (15)38,975 (13)16,246 (37)55,221 (16)
 PVD9807 (6)2309 (12)12,116 (7)18,389 (6)5710 (13)24,099 (7)
 CEVD11,989 (7)1883 (9)13,872 (8)22,933 (8)4491 (10)27,424 (8)
 Dementia589 (0)164 (1)753 (0)1115 (0)362 (1)1477 (0)
 COPD38,440 (24)5892 (29)44,332 (24)73,606 (24)12,931 (29)86,537 (25)
LOS
 Mean±SD5.3±8.59.3±11.55.7±9.05.3±8.79.0±10.85.7±9.1
 Median (IQR)3 (2–6)6 (4–11)4 (2–6)3 (2–6)6 (3–11)4 (2–6)
 Mortality, n (%)2349 (1.5)2044 (10.2)4393 (2.4)4236 (1.4)4174 (9.4)8410 (2.4)
  • IQR, interquartile range; AMI, acute myocardial infarction; LD, liver disease; CHF, congestive heart failure; PVD, peripheral vascular disease; CEVD, cerebrovascular disease; COPD, chronic obstructive pulmonary disease.