Table 1.

Tuberculosis symptom screen performance measures.

	Primary analysis	Secondary analysis
Measure	Estimation (95% CI)	Estimation (95% CI)
Sensitivity	61.2% (58.4-64.0)	54.7% (52.2–57.2)
Specificity	88.8% (88.7–88.9)	88.8% (88.6–88.9)
Positive-predictive value	3.2% (3.0–3.4)	3.7% (3.5–4.0)
Negative-predictive value	99.7% (99.7–99.7)	99.6% (99.6–99.6)
Positive likelihood ratio	5.5 (5.2–5.7)	4.87 (4.65–5.10)
Negative likelihood ratio	0.44 (0.41–0.47)	0.51 (0.48–0.54)

Primary analysis was performed with exclusion of patients with previously documented TB disease or no documented initiation of antituberculosis therapy within 30 days of TB diagnosis. Secondary analysis was performed with these groups included. CI, confidence interval; TB, tuberculosis.