Table 4

Cross tabulation of McIsaac modification of Centor score and culture
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 Yes = Number of patients GABHS+ in culture / Total number of patients with respective score.

2 No = Number of patients not found GABHS+ in culture.

3 TN = True negative; TP = True positive; FP = False positive; PPV = positive predictive value; NPV = negative predictive value.

4 Sensitivity and specificity of scores 0 to 4.

Palla et al.

Palla et al. BMC Pulmonary Medicine 2012 12:70   doi:10.1186/1471-2466-12-70

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