Annual Summary: 2000 Minnesota Sexually Transmitted Disease Statistics

Sources and Limitations of Data

In Minnesota, laboratory-confirmed infections of chlamydia, gonorrhea, syphilis, and chancroid are monitored by the Minnesota Department of Health (MDH) through a passive, combined physician and laboratory-based surveillance system. State law (Minnesota Rule 4605.7040) requires both physicians and laboratories to report all cases of these four bacterial sexually transmitted diseases (STDs) directly to the MDH. Other common sexually transmitted conditions caused by viral pathogens, such as herpes simplex virus (HSV) and human papillomavirus (HPV), are not reported to the MDH. Factors that impact the completeness and accuracy of the available data on STDs include: level of screening, accuracy of diagnostic tests, and compliance with case reporting. Thus, any changes in STD rates may be due to one of these factors, or due to actual changes in STD occurrence.

Population estimates by year, age, gender, race, and Hispanic origin for Minnesota counties were obtained from the U.S. Census Bureau. Corresponding population estimates for the entire state were calculated from these county data. Population estimates for Minneapolis and St. Paul were calculated by applying the rates of change observed for Hennepin County and Ramsey County to the 1990 census data for Minneapolis and St. Paul, respectively. Please note that the population estimates used in calculating the rates for a given year are always one year older than for the reported number of cases. For example, 2000 rates are calculated by using 2000 case data and 1999 population data.

Overview of Statistics and Highlights

Trends in chlamydia infection, gonorrhea, and primary/secondary syphilis rates (per 100,000 persons) by year of diagnosis for the years 1996 through 2000 are shown in Figure 1. The corresponding number of cases and rates for all reportable bacterial STDs for the same years are presented in Table 1. In Table 2, chlamydia, gonorrhea, and primary/secondary syphilis case numbers and rates by residence, age, gender, and race/ethnicity for 2000 are provided. Finally, chlamydia and gonorrhea case numbers and rates by county for 2000 are shown in Table 3.

In 2000, chlamydia, gonorrhea, and primary/secondary syphilis rates increased compared to the previous year (increases of 8%, 10%, and 50%, respectively). Despite the increase, the primary/secondary syphilis rate remained low. STD rates continue to be highest in the seven county metropolitan area, particularly in the cities of Minneapolis and St. Paul. Adolescents and young adults (aged 15-24 years) have the highest rates of chlamydia and gonorrhea, whereas the highest rates for primary/secondary syphilis are among persons in older age groups. For gonorrhea and primary/secondary syphilis, rates are comparable for men and women. The rate of chlamydia infection among women, however, is more than two times higher than the rate among men. This is largely due to more frequent screening among women. Rates of STDs are highest among communities of color. Blacks, American Indians, Hispanics, and Asians have rates that are nearly two to 75 times higher than rates for whites, depending on the STD and the racial/ethnic group.

Table 1. Number of Cases and Rates (per 100,000 persons) of
Chlamydia, Gonorrhea, Syphilis, and Chancroid – Minnesota, 1996 - 2000

Disease

1996
Cases

1996
Rate

1997
Cases

1997
Rate

1998
Cases

1998
Rate

1999
Cases

1999
Rate

2000
Cases

2000
Rate

Chlamydia

5,418

118

6,804

146

6,996

149

7,459

158

8,102

170

Gonorrhea

2,622

57

2,438

53

2,716

58

2,830

60

3,160

66

All Stages of Syphilis

123

2.7

118

2.5

78

1.7

72

1.5

79

1.7

Primary/Secondary Syphilis

15

0.3

16

0.3

9

0.2

10

0.2

16

0.3

Early Latent Syphilis

29

0.6

20

0.4

8

0.2

9

0.2

18

0.4

Late Latent Syphilis

78

1.7

82

1.8

61

1.3

52

1.1

43

0.9

Congenital Syphilis*

1

1.6

0

0.0

0

0.0

1

1.5

2

3.0

Chancroid

0

0.0

0

0.0

0

0.0

1

0.0

0

0.0

* Rate per 100,000 live births

Table 2. Number of Cases and Rates (per 100,000 persons) of Chlamydia, Gonorrhea, and Primary/Secondary Syphilis by Residence, Age, Gender, and Race/Ethnicity –
Minnesota, 2000

Group

Chlamydia
Cases

Chlamydia
Rate

Gonorrhea
Cases

Gonorrhea
Rate

Primary/Secondary
Syphilis Cases

Primary/Secondary
Syphilis Rate

Residence

Minneapolis

2,673

684

1,589

407

9

2.3

St. Paul

1,647

604

714

262

2

0.7

Suburban *

1,846

98

540

29

2

0.1

Greater Minnesota

1,936

87

317

14

3

0.1

Age

<10 yrs

6

1

0

0

0

0.0

10-14 yrs

146

39

50

13

0

0.0

15-19 yrs

2,762

735

874

233

2

0.5

20-24 yrs

2,944

956

951

309

2

0.6

25-29 yrs

1,230

418

531

180

3

1.0

30-34 yrs

554

165

322

96

3

0.9

35-44 yrs

378

47

323

40

1

0.1

45+ yrs

82

5

109

7

5

0.3

Gender

Male

2,246

96

1,479

63

11

0.5

Female

5,856

242

1,681

69

5

0.2

Race/Ethnicity

White

3,230

73

784

18

3

0.1

Black

2,629

1,769

1,707

1,149

11

7.4

American Indian

316

540

72

123

1

1.7

Asian

410

314

44

34

0

0.0

Other or Unknown †

1,517

---

553

---

1

---

Hispanic §

604

652

125

135

0

0.0

TOTAL

8,102

170

3,160

66

16

0.3

* Suburban is defined as the seven county metropolitan area (Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, and Washington Counties), excluding cities of Minneapolis and St. Paul

† No population data available to calculate rates
§ Persons of Hispanic origin may be of any race

Table 3. Number of Cases and Rates (per 100,000 persons) of Chlamydia and Gonorrhea
by County – Minnesota, 2000

County

Chlamydia
Cases

Chlamydia
Rate

Gonorrhea
Cases

Gonorrhea
Rate

Aitkin

7

49

1

7

Anoka

312

104

69

23

Becker

23

77

0

0

Beltrami

78

199

6

15

Benton

23

66

10

29

Big Stone

2

36

1

18

Blue Earth

87

162

19

35

Brown

16

60

0

0

Carlton

24

76

5

16

Carver

27

40

6

9

Cass

34

126

3

11

Chippewa

4

31

0

0

Chisago

18

43

2

5

Clay

52

101

7

14

Clearwater

8

98

1

12

Cook

0

0

1

21

Cottonwood

7

59

2

17

Crow Wing

48

91

3

6

Dakota

322

92

95

27

Dodge

18

104

0

0

Douglas

20

64

0

0

Faribault

9

55

0

0

Fillmore

13

63

0

0

Freeborn

39

124

6

19

Goodhue

20

46

2

5

Grant

2

33

1

17

Hennepin

3,434

323

1,858

175

Houston

7

36

4

21

Hubbard

11

65

4

24

Isanti

15

49

2

7

Itasca

22

50

6

14

Jackson

8

70

1

9

Kanabec

4

28

0

0

Kandiyohi

31

76

1

2

Kittson

0

0

1

19

Koochiching

8

54

0

0

Lac Qui Parle

0

0

0

0

Lake

3

28

1

9

Lake of the Woods

3

65

0

0

Le Sueur

6

24

1

4

Lincoln

0

0

0

0

Lyon

12

50

1

4

McLeod

9

26

2

6

Mahnomen

17

334

0

0

Marshall

5

50

0

0

Martin

18

83

5

23

Meeker

9

41

2

9

Mille Lacs

10

47

1

5

Morrison

10

33

1

3

Mower

60

162

12

32

Murray

2

21

0

0

Nicollet

9

31

2

7

Nobles

37

194

12

63

Norman

3

40

0

0

Olmsted

191

160

4

3

Otter Tail

22

40

9

16

Pennington

29

214

0

0

Pine

23

93

1

4

Pipestone

0

0

0

0

Polk

55

179

2

7

Pope

4

37

0

0

Ramsey

1,853

381

769

158

Red Lake

1

24

0

0

Redwood

3

18

0

0

Renville

8

48

1

6

Rice

36

66

4

7

Rock

3

31

0

0

Roseau

13

81

0

0

St. Louis

267

138

83

43

Scott

46

55

8

10

Sherburne

29

46

7

11

Sibley

13

88

0

0

Stearns

205

158

53

41

Steele

27

84

3

9

Stevens

3

30

0

0

Swift

7

62

1

9

Todd

12

50

0

0

Traverse

0

0

0

0

Wabasha

8

38

1

5

Wadena

6

45

0

0

Waseca

15

81

0

0

Washington

172

85

38

19

Watonwan

7

61

0

0

Wilkin

2

27

2

27

Winona

45

94

8

17

Wright

29

33

9

10

Yellow Medicine

2

18

0

0

 

Updated Monday, 02-Jun-2014 14:09:52 CDT