Table 5.

Quantitative Interferon-γ Responses in the QuantiFERON-TB Assay by Obstructive Coronary Artery Disease

	Peru		Uganda			Total
QFT Quantitative IFNg Responses	No OCAD (n = 65)	OCAD (n = 4)	P a	No OCAD (n = 125)	OCAD (n = 10)	P a	No OCAD (n = 190)	OCAD (n = 14)	P a
QFT TB Ag,b IFNg	0.97 (0.26–3.7)	6.6 (5.8–8.7)	.009	0.51 (0.12–2.9)	5 (0.3–10)	.075	0.67 (0.17–3.2)	6.63 (0.6–10)	.009
QFT Nil, IFNg	0.25 (0.15–0.67)	1.4 (0.7–2.5)	.019	0.12 (0.1–0.19)	0.12 (0.1–0.26)	.267	0.15 (0.1–0.33)	0.19 (0.11–1.4)	.148
QFT TB Ag minus Nil, IFNg	0.44 (0.03–2.6)	5.1 (4.7–6.6)	.016	0.42 (0.01–2.7)	2.2 (0.14–9.1)	.101	0.43 (0.01–2.7)	4.7 (0.49–8.3)	.011

Data presented as median with interquartile ranges in parenthesis.

Abbreviations: IFNg, interferon-γ (in IU/mL); OCAD, obstructive coronary artery disease; QFT, QuantiFERON-TB; QFT TB Ag, QuantiFERON TB Antigen responses; QFT Ag minus Nil, QuantiFERON TB Antigen minus Nil responses; QFT Nil, QuantiFERON Nil responses.

^a P values derived by Mann-Whitney-Wilcoxon test.

^bQFT TB Ag data source was TB1 Antigen in Peru from QFT-Plus assay and TB Antigen in Uganda from QFT-GIT assay.