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Table 4 Cross tabulation of McIsaac modification of Centor score and culture

From: Over prescription of antibiotics for adult pharyngitis is prevalent in developing countries but can be reduced using McIsaac modification of Centor scores: a cross-sectional study

McIsaac modification of Centor score

Culture positivity (N = 137)

 

Total

TN3

TP3

FP3

Score 0

0 (0%)

30 (100%)

30

30

–

0

Score 1

0 (0%)

30 (100%)

30

30

–

0

Score 2

0 (0%)

30 (100%)

30

30

–

0

Score 3

1 (3.4%)

29 (96.6%)

30

0

1

29

Score 4

5 (29.4%)

12 (70.6%)

17

0

5

12

Sensitivity4

100% (95% CI: 0.5–1)

     

Specificity4

68.7% (95% CI: 0.54–0.7)

     

PPV3,1

12.7% (95% CI: 0.05–0.26)

     

NPV3,2

100% (95% CI: 0.9–1)

     
  1. 1 Yes = Number of patients GABHS+ in culture / Total number of patients with respective score.
  2. 2 No = Number of patients not found GABHS+ in culture.
  3. 3 TN = True negative; TP = True positive; FP = False positive; PPV = positive predictive value; NPV = negative predictive value.
  4. 4 Sensitivity and specificity of scores 0 to 4.
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BMC Pulmonary Medicine

ISSN: 1471-2466

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