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Table 1 Baseline characteristics

From: Shorter laboratory turnaround time is associated with shorter emergency department length of stay: a retrospective cohort study

total number of ED visits

23,718

age (in years; mean + SD)

58.4 ± 17.8

female sex

11,041 (47%)

specialty

 medicine

20,551 (87%)

 surgery

3098 (13%)

 other

69 (< 1%)

time of day

 8:00–16:59

14,279 (60%)

 17:00–0:59

7510 (32%)

 1:00–7:59

1929 (8%)

number of daily patients (mean + SD)

55.9 ± 8.7

number of abnormal tests (median + IQR)

5.0 (3.0–7.0)

destination

 home

10,713 (45%)

 admission

12,524 (53%)

 transfer to another facility

410 (2%)

 death

71 (< 1%)

ESI triage level

 level 1

644 (3%)

 level 2

6401 (27%)

 level 5

23 (< 1%)

 not scored

27 (< 1%)

TAT (in minutes; median + IQR)

51.1 (41.1–65.0)

TTT (in minutes; median + IQR)

7.0 (2.0–12.0)

EDLOS (in minutes; median + IQR)

199.0 (146.0–268.0)

  1. All variables are absolute numbers and percentages (%) except where otherwise specified.
  2. ED emergency department; SD standard deviation; IQR interquartile range; ESI Emergency Severity Index [23]; TAT turnaround time; TTT time to laboratory test ordering; EDLOS emergency department length of stay