TABLE 1—

Crude and Estimated Gini Coefficients and 95% Confidence Intervals for Primary and Secondary Syphilis, Gonorrhea, Chlamydial Infection, and Initial Episodes of Genital Herpes, King County, Washington, 2000–2001

		Crude	Estimated
Disease	Observed Casesa	Gini Coefficient (95% CI)	Gini Coefficient (95% CI)
Syphilis	84	0.915 (0.887–0.929)	0.682 (0.637–0.776)
Gonorrhea	2396	0.633 (0.601–0.651)	0.57 (0.543–0.601)
Chlamydia	7493	0.443 (0.425–0.460)	0.411 (0.395–0.433)
Herpes	1276	0.409 (0.369–0.416)	0.255 (0.224–0.290)

Note. CI = confidence interval. For purposes of this table, Gini coefficient = percentage of the area above the 45° line that is encompassed by the curve.

^aObserved cases include only geocoded cases used in analyses.