Table 1. . Variables for matching between reverse-transcriptase polymerase chain reaction (RT-PCR) subcohort and matched subcohort of patients receiving other tests and no tests among women with vaginitis.

Baseline characteristics	Pre-match								Post-match
	RT-PCR n = 1964		Other PCR test n = 244,224		SMD	No test n = 238,362		SMD	RT-PCR N = 1964		Other PCR test n = 1964		SMD	No test n =		SMD
	n	%	n	%		n	%		n	%	n	%		n	%
Age group (years)
18–24	383	19.7%	65,347	26.8%	0.4711	23,806	10.0%	0.3726	383	19.7%	383	19.7%	0.0000	383	19.7%	0.0000
25–34	404	20.8%	70,246	28.8%		36,211	15.2%		404	20.8%	404	20.8%		404	20.8%
35–44	362	18.6%	52,181	21.4%		44,406	18.6%		362	18.6%	362	18.6%		362	18.6%
45–54	332	17.1%	34,200	14.0%		52,952	22.2%		332	17.1%	332	17.1%		332	17.1%
55–64	303	15.6%	18,970	7.8%		57,821	24.3%		303	15.6%	303	15.6%		303	15.6%
≥65	162	8.3%	3280	1.3%		23,166	9.7%		162	8.3%	162	8.3%		162	8.3%
Geographic region
Northeast	22	1.1%	41,756	17.1%	0.6060	36,695	15.4%	0.5748	22	1.1%	22	1.1%	0.0000	22	1.1%	0.0000
Midwest	630	32.4%	52,523	21.5%		60,206	25.3%		630	32.4%	630	32.4%		630	32.4%
South	1086	55.8%	119,079	48.8%		105,556	44.3%		1086	55.8%	1086	55.8%		1086	55.8%
West	208	10.7%	30,866	12.6%		30,866	12.6%		208	10.7%	208	10.7%		208	10.7%
CCI categories
0	1624	83.5%	214,435	87.8%	-0.1242	198,432	83.2%	0.0055	1624	83.5%	1624	83.5%	0.0000	1624	83.5%	0.0000
≥1	322	16.5%	29,789	12.2%		39,930	16.8%		322	16.5%	322	16.5%	0.0000	322	16.5%	0.0000
Presence of diabetes	115	5.9%	6987	2.9%	0.1493	13,423	5.6%	0.0119	115	5.9%	115	5.9%	0.0000	115	5.9%	0.0000
Presence of dyslipidemia	202	10.4%	13,803	5.7%	0.1748	27,850	11.7%	-0.0416	202	10.4%	202	10.4%	0.0000	202	10.4%	0.0000
Use of any antibiotic	542	27.9%	53,727	22.0%	0.1357	51,355	21.5%	0.1466	542	27.9%	542	27.9%	0.0000	542	27.9%	0.0000
Presence of a previous infection	73	3.8%	11,393	4.7%	-0.0455	11,353	4.8%	-0.0501	73	3.8%	73	3.8%	0.0000	73	3.8%	0.0000

CCI: Charlson comorbidity index; PCR: Polymerase chain reaction; RT-PCR: Real time-PCR; SMD: Standardized mean difference.