Correlation between tuberculin skin test and IGRAs with risk factors for the spread of infection in close contacts with sputum smear positive in pulmonary tuberculosis

Table 2 Agreement between tests and Κ coefficients

Patient characteristics	TST *versus*T-SPOT-TB		TST *versus*QFN-IT		T.SPOT-TB *versus*QFN-IT
Patient characteristics	Agreement (%)	Kappa	Agreement (%)	Kappa	Agreement (%)	Kappa
Total
All	62.6	0.172	50.91	0.121	82.82	0.659
BCG	51.58	0.119	42	0.078	83.84	0.664
No BCG	79.37	0.310	64.62	0.224	81.25	0.604
Adults
All	58.97	0.148	45.6	0.100	81.45	0.629
BCG	47.83	0.101	34.72	0.056	80.82	0.580
No BCG	75	0.256	60.38	0.195	82.35	0.637
Children
All	75	0.288	69.23	0.235	86.84	0.721
BCG	64	0.199	62.96	0.182	92	0.838
No BCG	93.33	0.634	83.33	0.429	76.92	0.418

BCG: Bacille Calmette-Guérin. TST: tuberculin skin test. QFN-G-IT: Quantiferon-TB Gold in tube.

ISSN: 1471-2334