Pre-Algorithm
(n=131)
Median (IQR)
Post-Algorithm
(n=568)
Median (IQR)
P-value  
Time from registration to first opioid, all* 53 (31.5, 83) 32 (23, 45) < 0.001
Time from registration to disposition, all† 210 (134, 296) 168 (121, 216) < 0.001
Time to disposition, admitted 223 (144, 318) 163 (114, 214) < 0.001
Time to disposition, discharged 190 (117, 267) 171 (125, 217) 0.22
Time from registration to departure, all† 345 (218, 493) 271 (194, 374) < 0.001
Time to departure, admitted 467 (355, 576) 368 (298, 471) < 0.001
Time to departure, discharged 237 (162, 304) 214 (170, 284) 0.47
Admission rate 54% (71/131) 38% (217/568) < 0.001
Admission length of stay (days)‡ 12 8 0.03
All time data are in minutes. IQR refers to Inter-quartile range. *Missing 11 pre-algorithm and 30 post-algorithm observations. † Missing 3 pre-algorithm (1 discharged patient and 2 admitted patients) and 11 post-algorithm observations (all 11 were admitted patients). ‡ Reported as a mean and missing 9 post-algorithm observations.  
Table 3: Pre-Algorithm and Post-Algorithm ED Visit Comparison.