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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Am J Kidney Dis. 2015 Aug 28;67(3):384–390. doi: 10.1053/j.ajkd.2015.07.019

Table 2.

Inpatient characteristics by AKI stage from 24 hours prior to until 48 hours after admission.

Stage 1 (n=443) Stage 2 (n=199) Stage 3 (n=80) P Value

Age (y) 6.4 (2.0 – 13.7) 4.1 (2.0 – 8.8) 4.2 (1.8 – 10.4) < 0.0011

Male sex 243 (55%) 119 (60%) 51 (64%) 0.092

Hospital Length of Stay (d) 4 (2 – 7) 5 (3 – 10) 5 (2 – 10) 0.0011

Weight z-score −0.2 (−1.2 – 0.8) −0.8 (−1.9 – 0.2) −0.3 (−1.3 – 0.7) 0.0041

Total no. of Unique Medications 4 (2 – 7) 5 (2 – 7) 4 (2 – 9) 0.11

No. of group 1* medications given 0.83

 0 257 (58%) 119 (60%) 51 (64%)
 1 134 (30%) 60 (30%) 20 (25%)
 ≥2 52 (12%) 20 (10%) 9 (11%)

No. of group 2* medications given <0.0011

 0 0: 349 (79%) 0: 138 (69%) 0: 53 (66%)
 1 1: 79 (18%) 1: 40 (20%) 1: 16 (20%)
 ≥2 =2: 15 (3%) =2: 21 (11%) =2: 11 (14%)

Contrast Given in Prior 7 Days 30 (7%) 9 (5%) 3 (4%) 0.21

Note: Values for categorical variables are given as number (percentage); for continuous variables, as median [interquartile range].

P values compare stages 1, 2, and 3 by the 1Proportional odds test, 2Cochran-Armitage trend test, or 3Pearson chi-squared test.

*

Groups 1 and 2 are nephrotoxic medications; see Methods.