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Table 2 Patient characteristics by pRIFLEmax AKI status

From: Urine neutrophil gelatinase-associated lipocalin is an early marker of acute kidney injury in critically ill children: a prospective cohort study

Characteristic

Control (n = 34)

pRIFLEmax R (n = 50)

pRIFLEmax I (n = 31)

pRIFLEmax F (n = 25)

Age (years)

8.5 ± 6.2a/8 (11.0)

5.9 ± 6.7/2 (12.4)

4.4 ± 5.7/1 (8.7)

6.6 ± 6.4/4 (11.2)

PRISM II scoreb

12.5 ± 7.7/12.5 (10)

14.2 ± 7.9/15 (13)

15.9 ± 7.3/16 (9)

19.0 ± 8.0/19 (12)

Day of admission enrolled (days)

2.8 ± 1.0/3 (1)

2.8 ± 1.1/2.5 (1)

3.3 ± 2.1/3 (2)

3.1 ± 1.7/3 (2)

Day of admission of pRIFLEmax

NA

3.6 ± 3.6/2 (4)

2.5 ± 2.6/1 (2)

3.5 ± 4.0/1 (3)

Day of ventilation first urine collection

2.2 ± 0.7/2 (0.5)

2.5 ± 1.1/2 (1)

2.2 ± 0.8/2 (1)

2.3 ± 0.9/2 (1)

Days from day 0 of first urine collectionc

NA

-0.8 ± 3.7/0 (4)

1.8 ± 2.2/1 (1)

1.7 ± 1.0/2 (1)

Male

18 (52.9)

27 (54.0)

18 (58.1)

12 (48.0)

Sepsis

7 (20.6)

4 (8.0)d

12 (38.7)

9 (36.0)

Dialysis

0

0

2 (6.5)

5 (20.0)

30-day mortality

3 (8.8)

4 (8.0)

6 (19.4)

7 (28.0)

  1. Values are expressed as mean ± standard deviation/median (interquartile range) or as n (%). aControl patients were older than those with pRIFLEmax R and I acute kidney injury (AKI; P < 0.05, Mann-Whitney test). bPediatric Risk of Mortality (PRISM) II score increased progressively with increasing pRIFLEmax strata (P < 0.05, Kruskal-Wallis test). cNumber of days from the day of AKI attainment that the first of four urine samples was collected for each patient. dPatients in the pRIFLEmax R group had a lower proportion of sepsis, as compared with those in the pRIFLEmax I and F groups (both P < 0.05, z-test). pRIFLEmax, the worst pRIFLE stratum attained; pRIFLE, pediatric modified Risk, Injury, Failure, Loss, End Stage Kidney Disease.