Ebell and Hansen developed a classification and regression tree (CART) model for evaluating an adult for acute rhinosinusitis in primary care. The authors are from the University of Georgia and Aarhus University Hospital in Denmark.
Patient selection: adult being evaluated for rhinosinusitis
Parameters:
(1) unilateral tender maxillary sinus
(2) serum CRP in mg/L
(3) preceding sinusitis
(4) maxillary toothache
Tender Maxillary Sinus
CRP
Preceding Sinusitis
Maxillary Toothache
Risk
Yes
< 25 mg/L
Yes
NA
moderate (34%)
Yes
>= 25 mg/L
Yes
NA
moderate (47%)
Yes
NA
No
NA
high (65%)
No
< 17 mg/L
NA
No
low (23%)
No
< 17 mg/L
NA
Yes
low (8%)
No
>= 17 mg/L
NA
No
low (19%)
No
>= 17 mg/L
NA
Yes
moderate (52%)
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