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Table 2 ED stay characteristics based on Maximum Abbreviated Injury Scale (MAIS) score

From: Anticipated resource utilization for injury versus non-injury pediatric visits to emergency departments

Total injury visits ED stay characteristic Visits without MAIS mapping determine MAISa 1 MAIS 2 MAIS 3 MAIS 4 MAIS 5 MAIS 6 Statisticb
E-code without injury ICD-9 ICD-9 with insufficient detail to be mapped
n = 65,176 n = 109,195 n = 451,753 n = 120,183 n = 16,227 n = 914 n = 236 n = 49  
N = 763,733 % of all patients 8.5 14.3 59.2 15.7 2.1 0.1 0.03 0.01 ---------
LOS (mean)c 213.6 153.2 149.0 230.1 423.7 459.1 554.4 374.8 <0.001
LOS (median)d 138.0 113.0 120.0 166.0 232.0 176.5 204.0 151.5 <0.001
% admitted 14.2 5.9 2.6 17.6 79.2 89.2 90.0 42.9 <0.001
% transferred 1.4 0.2 0.2 0.6 0.9 1.0 1.7 2.0 <0.001
% died in ED 0.2 0.1 <0.1 <0.1 0.2 0.6 0.9 18.4 <0.001
Median ISS N/A N/A 1 4 9 17 26 75 <0.001
  1. aMaximum Abbreviated Injury Scale (AIS) score
  2. bTesting differences in LOS (Kruskal-Wallis test), increasing trend in median LOS (likelihood ratio test), and Admit % across various MAIS (1-6 only) (Cochran-Armitage trend test)
  3. cCorresponding mean Length of stay (LOS) for each MAIS in minutes (excluding visits resulting in death in ED n = 393)
  4. dCorresponding median Length of stay (LOS) for each MAIS in minutes (excluding visits resulting in death in ED n = 393)