TABLE 3.

AGREEMENT BETWEEN T-SPOT AND TST

	TST Positive*	TST Negative	Total
T-Spot positive	15 (0.8%)	19 (1.1%)	34 (1.9%)
T-Spot negative	33 (1.9%)	1,714 (96.2%)†	1,747 (98.1%)
Total	48 (2.7%)	1,733 (97.3%)	1,781

Definition of abbreviations: T-Spot = T-SPOT.TB test; TST = tuberculin skin test.

^*TST positive defined by risk stratified interpretation (30).

^†Includes 23 subjects with borderline TB response of five spots (11 subjects), six spots (11 subjects), or seven spots (one subject).

% agreement = 97.1%.

Κ (95% confidence interval) = 0.35 (0.22–0.49).