Table 2.

Partner Services Indices for Early Syphilis in King County, WA 2010-2014

*Partner Services Indices	In-person Interview N=682 Counts Index	Telephone Interview N=646 Counts Index	**Unadjusted Relative Risk (95% CI)	P- value	***Adjusted Relative Risk (95% CI)	P- value
Contact index	2340 3.43	1329 2.06	1.67 (1.56, 1.78)	<0.001	1.68 (1.55, 1.82)	<0.001
Notification Index	1155 1.70	724 1.13	1.51 (1.38, 1.66)	<0.001	1.39 (1.24, 1.56)	<0.001
Syphilis test index	786 1.15	463 0.72	1.61 (1.43, 1.80)	<0.001	1.34 (1.16, 1.54)	<0.001
HIV test index	355 0.52	131 0.20	2.57 (2.10, 3.14)	<0.001	1.45 (1.14, 1.86)	0.003
Epidemiologic index	703 1.03	477 0.74	1.40 (1.24, 1.57)	<0.001	1.19 (1.03, 1.37)	0.017
Syphilis case- finding index	193 0.28	162 0.25	1.13 (0.92, 1.39)	0.257	0.91 (0.71, 1.17)	0.470
HIV case-finding index	14 0.02	5 0.01	2.65 (0.96, 7.36)	0.061	1.83 (0.56, 5.95)	0.316
Brought-to- treatment index	189 0.28	153 0.24	1.17 (0.95, 1.45)	0.149	0.93 (0.72, 1.21)	0.600

HIV: Human immunodeficiency virus

^*All indices have a denominator of total original patients interviewed (N). Numerators are:

Contact index: Partners named

Notification index: Partners notified

Syphilis test index: Partners tested for syphilis

HIV test index: Partners tested for HIV

Epidemiology index: Partners empirically treated for syphilis

Syphilis case-finding index: Partners diagnosed with syphilis

HIV case-finding index: Partners diagnosed with HIV

Brought-to-treatment index: Partners diagnosed with and treated for syphilis

^**Unadjusted Poisson regression model

^***Multivariable Poisson regression model adjusted for age, gender, race/ethnicity, sexual orientation, HIV status, time from diagnosis to interview, place of diagnosis, and disease intervention specialist who performed the interview.