. 2011 Mar 31;6(3):e18456. doi: 10.1371/journal.pone.0018456

Table 4. Number of chlamydia (from any site), HIV tests and anal swabs ordered in CASI (2009) and non-CASI (2008 and 2010) periods.

		CASI			non-CASI
	Test	n	N	%	n	N	%	p-value ^a
Heterosexual men	chlamydia	607	748	81	1330	1643	81	0.85
	HIV	323	715	45	687	1551	44	0.61
MSM	chlamydia	408	441	93	981	1045	94	0.40
	HIV	343	436	79	849	1041	82	0.23
	anal swab	369	441	84	842	1045	81	0.38
Female	chlamydia	645	767	84	1525	1735	88	<0.001
	HIV	330	751	44	817	1686	48	0.18

Logistic regression for differences in testing rates between CASI and non-CASI periods adjusting for potential intra cluster correlation from individual clinicians. n = number of patients tested; N = number of patients seen during each period. MSM = men who have sex with men.