Table 3. Results on the comparison of response rates and positivity calls in the inter-laboratory comparison study.

Antigen	IAVI response rate	HVTN response rate	Difference in response rate (95% CI)	Concordance (LB 95% CI)
CMV	98/146 = 67.1% (59.1%, 74.2%)	87/136 = 64.0% (55.6%, 71.6%)	0/131 = 0.0% (−1.5%, 1.5%)	131/131 = 100% (97.2%, 100%)
CEF	118/146 = 80.8% (73.7%, 96.4%)	114/137 = 83.2% (76.1%, 88.5%)	5/132 = 3.8% (−0.4%, 7.8%)	125/132 = 94.7% (89.5%, 97.4%)
Gag	6/146 = 4.1% (1.9%, 8.7%)	7/137 = 5.1% (2.5%, 10.2%)	3/132 = 2.3% (−1.9%, 6.4%)	125/132 = 94.7% (89.5%, 97.4%)