Table 3.

Combined diagnostic performance of NASBA, PCR or colloidal gold

Test combination	Proven/probable cases (n = 25)	Control group (n = 40)	Sensitivity (%)	Specificity (%)	Accuracy (%)	Kappa
NASBA+ or PCR+	23	8	92.00	80.00	84.62	0.69
NASBA+ and PCR+	16	1	64.00	97.50	84.62	0.65
NASBA+ or colloidal gold+	25	7	100.00	82.50	89.23	0.78
NASBA+ and colloidal gold+	23	1	92.00	97.50	95.38	0.90
PCR+ or colloidal gold+	25	13	100.00	67.50	80.00	0.62
PCR+ and colloidal gold+	16	1	64.00	97.50	84.62	0.65
NASBA+ or PCR+ or colloidal gold+	25	14	100.00	65.00	78.46	0.59
NASBA+, PCR+ and colloidal gold+	16	0	64.00	100.00	86.15	0.69

Best performance values are highlighted in bold