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Table 1 Characteristics and outcomes of the study patients (N = 137)

From: Predicting contrast-induced nephropathy after CT pulmonary angiography in the critically ill: a retrospective cohort study

Variables

Median (interquartile range) unless stated otherwise

Age, years

53 (43–69)

Male, no. (%)

97 (70.8)

Comorbidities, no. (%):

 - Diabetes mellitus

41 (30)

 - Cancer

28 (20)

 - Chronic lung disease

33 (24)

 - Congestive heart failure

56 (41)

Baseline organ support therapy, no. (%):

 - Inotropes

54 (39)

 - Mechanical ventilation

68 (50)

 - Intra-aortic balloon pump

2 (2)

Baseline physical signs, no. (%):

 - Tachycardia (> 110 bpm)

68 (50)

 - Hypotension (< 100 mmHg)

70 (51)

 - Tachypnoea (> 30 breaths/min)

77 (56)

 - Hypothermia (< 36C°)

19 (14)

 - Altered mental state

38 (28)

 - Hypoxaemia (SaO2 < 90%)

104 (76)

 Haemoglobin concentrations, d/L

110 (89–131)

 Haematocrit, %

33 (27–40)

 Plasma creatinine conc., μmol/L

89 (64–137)

 CIN risk score

9 (4–16)

 Pulmonary Embolism Severity Index

144 (99–190)

 APACHE II score

23 (17–31)

Outcomes:

 Maximum creatinine conc. within 48 h after CTPA, μmol/L

92 (65–178)

 CIN within 48 h of CTPA, no. (%)

56 (41)

 Required subsequent dialysis, no. (%)

35 (26)

 Acute pulmonary embolism (PE), no. (%)

21 (15)

 Bilateral PE, no. (%)

14 (10)

 Pneumonia on CTPA, no. (%)

66 (48)

 Hospital mortality, no. (%)

69 (50)

 Length of ICU stay, days

6 (3–16)

 Length of hospital stay, days

13 (7–26)

 CIN prediction score > 10: PPV for CIN, %

75.5

 CIN prediction score > 10: NPV for CIN, %

86.6

 CIN prediction score > 12: PPV for dialysis, %

58.2

 CIN prediction score > 12: NPV for dialysis, %

94.0

  1. APACHE Acute Physiology and Chronic Health Evaluation, CTPA CT pulmonary angiography, CIN contrast-induced nephropathy: defined as an elevation in plasma creatinine concentrations > 44.2μmol/l (or 0.5 mg/dl) within 48 h after CTPA, ICU intensive care unit, NPV negative predictive value, PPV positive predictive value, SaO 2 arterial oxygen saturation