Oostenbrink et al identified factors associated with pneumonia in a child with fever and cough. They authors are from Erasmus MC, Sophia Children's Hospital, Oxford University, University of Leicester and University Hospital Coventry and Warwickshire.
Patient selection: 1 month to 16 years, with fever and cough in the ED
Parameters:
(1) ill-appearance
(2) tachypnea (greater than upper limit of breaths per minute for age)
(3) oxygen saturation in percent
(4) serum CRP
Age
Respiratory Rate
< 2 months
> 60
2 to 12 months
> 50
12 to 36 months
> 40
36 to 60 months
> 35
> 60 months
>25
Parameters
Findings
Points
ill-appearance
no
0
yes
0.6
tachypnea
no
0
yes
1.1
oxygen saturation
>= 94%
0
< 94%
0.7
serum CRP
< 20 mg/L
0
>= 20 mg/L
0.3
value of X =
= SUM(points for all of the parameters) - 2.5
probability of pneumonia =
= 1 / (1 + EXP((-1) * X))
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