Table 4.

Sensitivity, specificity, and likelihood ratios of the positive (LR+) and negative (LR−) test result of the full and reduced models for influenza, among children and adults with influenza-like illness (ILI) in southern Sri Lanka, March–November 2013^*

	Sensitivity (95% CI)	Specificity (95% CI)	LR+ (95% CI)	LR– (95% CI)
Children
Full model	76.9 (65.8–85.4)	57.3 (46.4–67.6)	1.80 (1.38–2.36)	0.40 (0.26–0.61)
Reduced model	50.0 (38.6–61.4)	83.2 (73.4–90.0)	2.97 (1.78–4.95)	0.60 (0.48–0.75)
Adults
Full model	69.6 (57.2–79.8)	64.3 (51.9–75.1)	1.95 (1.37–2.77)	0.47 (0.33–0.69)
Reduced model	52.2 (39.9–64.2)	81.4 (70.0–89.4)	2.81 (1.64–4.82)	0.59 (0.46–0.76)

CI = confidence intervals; LR = likelihood ratio; OR = odds ratio.

^*Values are shown for the cutoff value at which sensitivity and specificity were maximized in each model.