Gonorrhea 2001

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Rates presented are per 100,000 population and are based on the U.S. 2000 Census.

  Cases Incidence
Rate
Total 6,979 114.8
Race-specific cases and rates1
White  1,457 27.4
Black  4,371 857.0
Other2   198 79.1
Sex-specific cases and rates3
Female 3,795 122.5
Male 3,173 106.4

In 2001, ISDH received 6,979 reports of patients who tested positive for Neisseria gonorrhea, the causative agent of gonorrhea. This sum translates to a crude rate of 114.8 per 100,000 Indiana residents.

Gonorrhea morbidity has been stable during the period 1997 through 2001 (Figure Gon1). The number of case reports ranged from 6,154 known cases in 1999 to 6,979 cases in 2001; 9.3% more cases were reported in 2001 than in 1997 (6,383). Inter-year differences ranged from a decrease of 7.4% from 1998 (6,643) to 1999 (6,154) to an increase of 7.4% from 2000 (6,500) to 2001 (6,979).

The number of cases among women exceeded that of men in 2001. Of cases with known gender, 3,795 female cases were reported, and 3,173 male cases were reported. This gender disparity is consistent with that found in the previous year, but more pronounced. In 2001, the sex specific rate was 122.5 per 100,000 females and 106.4 per 100,000 males, an increase from 113.3 (females) and 105.0 (males) reported in 2000. In terms of gonococcal infections, women were overrepresented with respect to their percentage of Indiana’s population. While comprising just 49.0% of the population, women accounted for 54.5% of the reported gonorrhea infections. Compared with men, greater morbidity among women may be attributable to higher infection rates among females, a greater number of tests among women, or other factors.

In 2001, more cases were reported among blacks than among all other racial groups combined. Of gonorrhea cases with known race, 4,371 (73.5%) were classified as black while 1,457 (24.2%) cases were classified as white. The race-specific rates for blacks (857.0) was higher than that for whites (27.4). Of the total number of cases reported in 2001, 13.7% (953) were of unknown race. Even if all of these cases were among whites, the racial disparity would still be observed. This disparity may be attributable to higher infection rates among blacks, underreporting of gonorrhea among whites, or other factors.

The preponderance of gonorrhea cases was among adolescents and young adults. In 2001, 2,036 cases were reported among those ages 10-19, and 3,382 cases were reported among those ages 20-29; together, these two groups comprised 77.6% of total cases reported. Those ages 10-39 accounted for 91.7% of all reports.  The age-specific incidence rate was highest for those ages 20-29 (405.1) and next highest for those ages 10-19 (227.0) (Figure Gon2).

Marion County had a disproportionately high number of cases in 2001. Comprising just 14.2% of Indiana’s population, Marion County contributed 48.4% (3,375 cases) to the 2001 total case count. This translates to an incidence rate of 392.2 cases per 100,000 Marion County residents. Incidence rates for St. Joseph and Allen Counties were 256.8 and 198.0 per 100,000 residents, respectively, also well above the state rate of 114.8 (Table Gon1, Figure Gon3).

Table Gon1: Gonorrhea - Reported Cases by County, Indiana, 2001

Gonorrhea - Reported Cases by County
Indiana, 2001
County Number of 
Reported Cases
Incidence Rate per 
100,000 Population
Allen 657 197.9
Bartholomew 20 28.0
Boone 9 19.5*
Cass 8 19.6*
Clark 54 56.0
Clay 5 18.8*
Delaware 107 90.1
Elkhart 278 152.1
Floyd 54 76.3

Gibson

9 27.7*
Grant 79 107.6
Greene 7 21.1*
Hamilton 25 13.7
Hancock 13 23.5*
Harrison 7 20.4*
Hendricks 16 15.4*
Henry 6 12.4*
Howard 91 107.1
Huntington 5 13.1*
Jackson 8 19.4*
Jay 8 36.7*
Jefferson 5 15.8*
Johnson 35

30.4

Knox 6 15.3*
Kosciusko 6 8.1*
Lake 607 125.3
LaPorte 144 130.8
Lawrence 8 17.4*
Madison 82 61.5
Marion 3,375 392.2
Monroe 67 55.6
Morgan 8 12.0*
Noble 10 21.6*
Porter 24 16.4
Putnam 5 13.9*
Saint Joseph 682 256.8
Scott 5 21.8*
Shelby 8 18.4*
Tippecanoe 30 20.1
Vanderburgh 190 110.5
Vigo 91 86.0
Warrick 13 24.8*
Wayne 25 35.7
Source: Indiana State Department of Health
Note: Rates based on 2000 U.S. Census population.  All other counties had fewer than 
5 cases and are not reported to protect case confidentiality.  County was unknown for 7
of the reported cases.
* Rate based on less than 20 cases and should be considered unstable.
 

Footnotes

1 - Race was unknown for 953 of the reported cases.

2 - "Other" includes American Indian/Alaska Native, Asian, Native Hawaiian/Pacific Islander, and multiracial.

3 - Sex was unknown for 11 of the reported cases.

* - Rate based on less than 20 cases and should be considered unstable.