Bacteriological methods as add on tests to fine-needle aspiration cytology in diagnosis of tuberculous lymphadenitis: can they reduce the diagnostic dilemma?

Table 4 Diagnostic efficiency of FNA cytology as compared to composite gold standard (n = 188)

Diagnostic efficiency of FNA cytology	Value	95% Confidence interval
Sensitivity	88.4%	82.1%- 93.1%
Specificity	48.8%	32.9% -64.9%
*ROC area (Sens. + Spec.)/2**	0.686	0.604- 0.768
Likelihood ratio (+)	1.73	1.27 -2.34
Likelihood ratio (−)	0.237	0.137- 0.409
Odds ratio	7.28	3.32- 16
Positive predictive value	86.1%	79.5% -91.2%
Negative predictive value	54.1%	36.9%- 70.5%

*ROC = Receiver operator characteristic curves (plot of false positives against true positives for all cut-off value).

ISSN: 1471-2334