Ayuso et al reported a simple score for predicting respiratory failure in a hospitalized patient with influenza. This can help to identify a patient who may require more aggressive management. The authors are from University of Hospital 12 de Octubre and University Hospital Lucus Augusti in Madrid.
Patient selection: hospitalized for influenza
Parameters:
(1) absolute lymphocyte count per µL on admission
(2) respiratory rate in breaths per minute
(3) serum LDH on admission
(4) radiologic change on chest X-ray
Parameter
Finding
Points
absolute lymphocyte count
> 600 per µL
0
400 to 600 per µL
1
< 400 per µL
2
respiratory rate
<= 20 breaths per minute
0
21 to 28 breaths per minute
1
> 28 breaths per minute
2
serum LDH
< 280 U/L
0
280 to 400 U/L
1
> 400 U/L
2
chest X-ray
normal
0
alteration
1
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 7
Total Score
Group
Respiratory Failure
0
A
0%
1 or 2
B
3.5%
3 or 4
C
10%
5 to 7
D
45%
Performance:
• The area under the ROC curve was 0.80.
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