TABLE 4

Admit decisions, lengths of stay, turnaround times, and ancillary testing

CharacteristicaValue in patients positive for:
Influenza virus onlyNon-influenza viruses
Season 1 (n = 158)Season 2 (n = 54)P valueSeason 1 (n = 40)Season 2 (n = 85)P value
Test ordered in ED before decision to admit or discharge, n (%)101 (64)31 (57)0.3918 (45)32 (38)0.43
Discharged from ED, n (%)50 (50)19 (61)0.253 (17)14 (44)0.067
    After test result39 (39)13 (42)0 (0)9 (28)
    Before test result11 (11)6 (19)0.0833 (17)5 (16)0.054
Discordant subgroup discharged from ED, n (%)17/46 (37)0.036b
Admitted from ED, n (%)51 (51)12 (38)15 (83)18 (57)
    After test result26 (26)2 (6)2 (11)4 (13)
    Before test result25 (25)10 (32)13 (72)14 (44)
Time (h) to discharge or admit if test ordered in ED, median (IQR); n5.0 (3.4–7.7); 1015.7 (4.1–7.9); 310.543.6 (2.7–5.8); 184.6 (2.9–6.8); 320.36
Admitted as inpatient (irrespective of time of test order), n (%)109 (69)35 (65)0.5737 (93)71 (84)0.26
    Slated for admission but discharged from ED after first test result26/109 (24)13/35 (37)0.122/37 (5)15/71 (21)0.049
Time (h) to floor bed if specimen received while in ED, median (IQR); n30.2 (16.7–51.9); 6235.3 (9.6–50.4); 110.8731.9 (20.0–51.3); 1625.4 (11.3–46.2); 320.36
Length of stay (h), median (IQR)49.8 (9.6–134.4)38.8 (8.2–116.2)0.63122.1 (62.2–215.1)85.2 (25.5–191.8)0.065
    Discordant subgroup56.8 (12.8–123.3)0.26b
Turnaround time (h) of positive viral test, median (IQR)7.7 (0.8–14)1.7 (1.6–2.2)0.01513.5 (8.4–38.7)1.5 (1.4–2.1)<0.0001
    Discordant subgroup13.3 (10–16.9)<0.0001b
Discharged from hospital before positive result, n (%)26 (16)5 (9)0.277 (18)7 (8)0.13
    Discordant subgroup17/60 (28)0.016b
CXR performed, n (%)139 (88)49 (91)0.8036 (90)77 (91)1
    No. of CXRs per patient, median (IQR)1 (1–2)1 (1–1)0.402 (1–5.5)1 (1–2)0.036
Chest CT performed, n (%)38 (24)9 (17)0.2615 (38)24 (28)0.30
    No. of CTs per patient, median (IQR)1 (1–1)1 (1–1)0.901 (1–1)1 (1–1)0.12
Bronchoscopies performed, n (%)9 (6)3 (6)14 (10)8 (9)1
    No. of bronchoscopies per patient, median (IQR)1 (1–2)1 (1–2)11 (1–1)1 (1–3.5)0.18
Radiographic abnormalities on chest imaging, n (%)54/141 (38)14/49 (29)0.2224/38 (63)36/78 (46)0.085
  • a IQR, interquartile range; CXR, chest radiograph; CT, computed tomography.

  • b P value for comparisons between discordant subgroup (season 1) and FilmArray (season 2).