NCEMI eTools
Strep pharyngitis probability score
Probability of positive results on culture of tonsillar exudate for Strep pyogenes for adults
Score: 0
0.64% probability
Assessment
0
0.64% probability
1
1.71% probability
2
4.53% probability
3
11.42% probability
4
25.95% probability
10
1.34% probability
11
3.55% probability
12
9.1% probability
13
21.39% probability
14
42.52% probability
20
2.96% probability
21
7.65% probability
22
18.38% probability
23
37.97% probability
24
62.47% probability
Tonsillar exudate?
Yes
1 points
No
0 points
Swollen or tender anterior cervical lymph nodes?
Yes
1 points
No
0 points
Fever?
Yes
1 points
No
0 points
Absence of cough (except in smokers)?
Yes
1 points
No
0 points
Prevalence of group A strep pharyngitis in patient's community
5%
0 points
10%
10 points
20%
20 points
Calculate
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