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Table 2 Prediction of the occurrence of acute kidney injury in univariate and multivariate regression analysis Univariate analysis

From: Plasma neutrophil gelatinase-associated lipocalin for the prediction of acute kidney injury in acute heart failure

Predictor

Hazard Ratio

P-value

Age (yrs)

HR 1.03 (95%CI 0.99-1.06)

0.06

Hx Heart Failure

HR 2.02 (95%CI 1.08-3.81)

0.03

Hx Chronic Kidney Disease

HR 2.15 (95%CI 1.16-3.99)

0.02

Steady State Creatinine > 110 μol/l

HR 2.21 (95%CI 1.16-4.23)

0.02

Outpatient Diuretic Treatment

HR 2.36 (95%CI 1.03-5.41)

0.04

Systolic Blood Pressure (mmHg)

HR 0.99 (95%CI 0.97-0.99)

0.03

Loop Diuretic Dose during first 72h

HR 1.00 (95%CI 1.00-1.01)

< 0.01

Urea (mmo/l)

HR 1.09 (95%CI 1.04-1.15)

< 0.001

Uric Acid (mmol/l)

HR 1.00 (95%Ci 1.00-1.00)

0.02

C-reactive protein (mg/l)

HR 1.01 (95%CI 1.00-1.01)

0.03

Troponin T (ug/l)

HR 1.06 (95%CI 1.01-1.19)

0.02

B-type natriuretic peptide (pg/ml)

(for every increase of 100 pg/ml)

HR1.00 (95%CI 0.99-1.02)

0.80

LV ejection fraction (%)

HR 0.99 (95%CI 0.97-1.02)

0.53

Creatinine (mmol/l)

(for every increase of 10 mml/l)

HR 1.13 (95%CI 1.01-1.20)

< 0.001

NGAL ng/ml

(for every increase of 10 ng/ml)

HR 1.01 (95%CI 1.04-1.15)

< 0.001

NGAL > 94 ng/ml

HR 1.44 (96%CI 0.15-14.20)

0.76

NGAL > 140 ng/ml

HR 3.40 (95%CI 1.61-7.15)

0.001

Multivariate analysis

Hx Heart Failure

HR 1.75 (95%CI 0.64-4.80)

0.24

Steady State Creatinine > 110 μmol/l

HR 2.41 (95%CI 0.66-8.88)

0.41

Systolic Blood Pressure (mmHg)

HR 1.01 (95%CI 0.99-1.02)

0.43

Outpatient Diuretic Treatment

HR 1.25 (95%CI 0.32-4.02)

0.58

Loop Diuretic Dose during first 72h

HR 1.00 (95%CI 0.99-1.00)

0.86

C-reactive protein (mg/l)

HR 1.00 (95%CI 0.99-1.01)

0.95

Troponin T (ug/l)

HR 3.72 (95%CI 0.02-13.53)

0.63

Creatinine (mmol/l)

(for every increase of 10 mml/l)

HR 1.12 (95%CI 1.00-1.24)

0.04

NGAL (ng/ml)

(for every increase of 10 ng/ml)

HR 1.05 (95%CI 0.98-1.13)

0.18

  1. To limit the effects of co-linearity between multiple parameters of renal and cardiac function multivariate analysis contained only the strongest univariate predictor in each class (acute renal function, chronic renal impairment, acute cardiac injury, chronic heart failure).