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Table 1 Characteristics of patients (not) at high risk for contrast-induced nephropathy

From: Guideline adherence for identification and hydration of high-risk hospital patients for contrast-induced nephropathy

Characteristics Patients at high risk Patients not at high risk Pa
n = 627 n = 3514
Sex, % male 54.5 54.1 0.831
Age in years, mean (SD) 74.9 (9.5) 64.0 (13.7) < 0.001
Length of stay in days, mean (SD) 4.7 (8.6) 3.4 (11.1) 0.004
Day admission, % 32.4 39.2 0.005
Acute admission, % 27.7 22.1 0.002
eGFR in ml/min/1.73 m2, mean (SD) 44.0 (11.6) 70.6 (17.1) < 0.001
Risk factors for CIN, %
    0 risk factors 1.1 42.0 < 0.001
    1 risk factor 9.7 26.6
    2 risk factors 31.3 15.8
    ≥3 risk factors 57.9 15.7
Diabetes mellitus 31.4 13.3 < 0.001
Peripheral vascular disease 20.4 9.6 < 0.001
Heart failure 39.2 19.9 < 0.001
Age > 75 year 52.3 18.8 < 0.001
Anemia 8.9 2.7 < 0.001
Symptomatic hypotension 1.6 0.5 0.002
Contrast volume > 150 ml 1.6 0.8 0.054
Decreased circulating volume 0.16 0.03 0.169
Use of diuretics 41.3 15.1 < 0.001
Use of nephrotoxic drugs 52.0 30.4 < 0.001
  1. Abbreviations: CIN Contrast-induced nephropathy.
  2. aTested by chi-square tests (categorical variables) or Student’s t-tests (continuous variables).