Table 2.

CT IgG antibody status in women with a CT-positive history and a CT-negative history.

		CT IgG Positive	Total	p Value
CT-negative history †		208 (7.5%)	2780 (100%)	<0.001 *
CT-positive history ‡		338 (40.6%)	833 (100%)
	NAAT positive in CSI	98 (47.6%)		0.018 **
	Self-reported positive	240 (38.3%)
Total		546 (15.1%)	3613 (100%)

CT—Chlamydia trachomatis, IgG—Immunoglobulin G, NAAT—Nucleic Acid Amplification Test, CSI—Chlamydia Screening Implementation study. ^† CT-negative history was defined as: no positive NAAT result during the CSI [16] and no self-reported positive CT test. ^‡ CT-positive history was defined as: at least one NAAT positive result during CSI or self-reported positive CT test. * p value of the difference in CT IgG positivity between CT history negative and CT history positive women. ** p-value of the difference in CT IgG positivity between CSI–NAAT positives and self-reported positive tests only.