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Table 2 Diagnostic accuracy of nurse practitioner diagnosis of suspected tuberculosis, compared to primary care physician diagnoses of suspected tuberculosis, and tuberculosis

From: Diagnostic accuracy of an integrated respiratory guideline in identifying patients with respiratory symptoms requiring screening for pulmonary tuberculosis: a cross-sectional study

 

Tuberculosis suspected by the primary care physician

Tuberculosis diagnosed by the primary care physician

True positives

276

36

False positives

240

462

False negatives

89

4

True negatives

787

867

Sensitivity % (95%CI)

76 (71–79)

90 (76–97)

Specificity % (95%CI)

77 (74–79)

65 (63–68)

Positive predictive value % (95%CI)

53 (49–58)

7 (5–10)

Negative predictive value % (95%CI)

90 (88–92)

99.5 (98.8–99.8)

Likelihood ratio for positive test

3.2

2.6

Likelihood ratio for negative test

0.31

0.15

Area under the ROC curve (95%CI)

0.76 (0.74–0.79)

0.78 (0.73–0.82)