Median days from onset to admission (range)
|
2 (0 – 15)
|
2 (0 – 20)
|
0.52
|
Admission within 2 days of illness onset
|
20 (53)
|
54 (55)
|
0.80
|
Median length of stay- days (range)
|
6 (0 – 47)
|
2 (1 – 10)
|
<0.01
|
Age 2–17 years old
|
12/38 (32)
|
42/99 (42)
|
0.24
|
Underlying medical condition excluding asthma
|
20 (53)
|
44 (44)
|
0.39
|
Pregnancy
|
3 (8)
|
5 (5)
|
0.83
|
Current smoker
|
7 (22)
|
16 (18)
|
0.82
|
Obese or morbidly obese†
|
8/29 (28)
|
21/69 (30)
|
0.29
|
Tachypnea
|
23/38 (61)
|
37/99 (37)
|
<0.01
|
Tachycardia
|
28/38 (74)
|
60/99 (60)
|
0.12
|
Mechanical ventilation
|
16/38 (42)
|
0/99 (0)
|
<0.01
|
Acute respiratory distress syndrome
|
9/38 (24)
|
0/99 (0)
|
<0.01
|
Sepsis syndrome
|
6/38 (16)
|
0/99 (0)
|
<0.01
|
Pneumonia at admission
|
22/37 (60)
|
23/86 (27)
|
<0.01
|
Seasonal flu vaccination
|
8/25 (32)
|
23/29 (39)
|
0.45
|
Influenza antiviral agent receipt
| | | |
Any during hospitalization
|
32/38 (84)
|
68/99 (69)
|
0.07
|
≤2 days of illness onset
|
13/32 (41)
|
36/66 (55)
|
0.14
|
≤2 days of admission
|
22/30 (73)
|
57/62 (92)
|
0.02
|
Median days from illness onset to antiviral initiation (range)
|
3 (0 – 15)
|
2 (0 – 15)
|
0.15
|
Other treatment
| | | |
Antibiotics
|
35/38 (92)
|
64/99 (65)
|
<0.01
|
Steroids
|
25/38 (66)
|
58/99 (59)
|
0.45
|