Table 1.

Population demographic and comorbidity characteristics

Baseline CharacteristicValue (n=379)
Median age (yr)65 (46–75)
Female, n (%)201 (53)
Ethnicity, n (%)
 white314 (83)
 African-American54 (14)
 other11 (3)
Diabetes mellitus, n (%)134 (35)
Hypertension, n (%)245 (65)
Coronary artery disease, n (%)163 (43)
Chronic heart failure, n (%)122 (32)
Cerebrovascular disease, n (%)95 (25)
Peripheral vascular disease, n (%)59 (16)
Chronic liver disease, n (%)42 (11)
Admission service, % (n/n)
 medical74 (280/379)
 surgical23 (87/379)
 other3 (12/379)a
ICU within 7 days of admission, n (%)126 (33)
Median adjudicated baseline creatinine (mg/dl)1.35 (1.03–1.70)
Mean adjudicated baseline creatinine ± SD (mg/dl)1.45±0.61
Median adjudicated baseline eGFR (ml/min per 1.73 m2)49 (38–67)
 < 60 ml/min per 1.73 m2, n (%)68 (259)
 30–59.9 ml/min per 1.73 m2, n (%)58 (220)
 <30 ml/min per 1.73 m2, n (%)10 (39)
Median admission serum creatinine (mg/dl)1.46 (1.09–2.00)
Mean admission serum creatinine ± SD (mg/dl) 1.75±1.19
Acute kidney injury stage, n (%)
 stage I35 (133)
 stage II34 (9)
 stage III11 (42)
  • Median values are expressed with interquartile ranges in parentheses. ICU, intensive care unit; eGFR, estimated GFR.

  • a Services providing both surgical and medical care are categorized as “Other.”