Table 3:

Association between reported use of internet-based apps to meet sex partners and notification of at least one sex partner of syphilis exposure among male index patients with early syphilis who report sex with men (MSM), January 2013 through December 2016.

Characteristics	Total Index patients	Index patients with ≥1 partner notified (% or IQR)a	Unadjusted Risk Ratio (95% CI) b	Adjusted Risk Ratio (95% CI)b
	3,414	1,960
Internet sex Partners
No	1,415	784 (55.4)	REF	REF
Yes	1,999	1,176 (58.8)	0.99 (0.88–1.12)	0.99 (0.87–1.13)
Race/Ethnicity
White	1,049	624 (59.5)	REF	REF
Black	2,065	1,168 (56.6)	0.94 (0.82–1.07)	0.95 (0.82–1.10)
Hispanic	240	132 (55.0)	0.92 (0.71–1.18)	0.92 (0.71–1.19)
Otherc	60	36 (60.0)	1.00 (0.64–1.57)	1.00 (0.64–1.57)
Age, median	29	28 (23, 37)	1.00 (0.99–1.01)	1.00 (0.99–1.01)
Bisexuald	470	271 (57.7)	0.99 (0.83–1.17)	0.99 (0.83–1.17)
HIV positivee	1,904	998 (52.4)	0.94 (0.83–1.06)	0.94 (0.82–1.08)
Prior STDf	2,200	1,218 (55.4)	0.97 (0.86–1.10)	1.02 (0.88–1.18)
New sex partnerg	2,317	1,324 (57.1)	0.97 (0.86–1.11)	0.98 (0.85–1.12)
Condom use
Always	389	176 (45.2)	REF	REF
Never	440	290 (65.9)	1.08 (0.84–1.39)	1.05 (0.82–1.36)
Sometimes	2,567	1,481 (57.7)	1.01 (0.82–1.24)	1.00 (0.80–1.23)
Missing	18	13 (72.2)	1.23 (0.56–2.72)	1.19 (0.53–2.64)

^aTotal number (N), Percentage (%) or Interquartile range (IQR)

^bAdjusted model includes all variables listed in table 3

^cAmerican Indian Alaskan Native, Asian, Native Hawaiian and Pacific Islander

^dIndex case reported at least one female sexual partner during the infectious period

^eHIV diagnosis date before or within 60 days after the syphilis diagnosis date as determined through matching to the NC enhanced HIV/AIDS Reporting System (eHARS) database

^fSexually Transmitted Infections (STIs) included gonorrhea, chlamydia, syphilis, HIV, viral hepatitis

^gProportion of index patients with ≥1 named sex partner that reported having at least one new sex partner during the infectious period.