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Primary and Secondary Syphilis Data

Illinois Reported Primary and Secondary Syphilis Cases and Rates per 100,000 Population by County

Cases

County 2023 2022 2021 2020 2019

Rates per 100,000 Population

County 2023 2022 2021 2020 2019

2010 U.S. Census used for 2019 Rates. 2020 U.S. Census used for 2020-2023 Rates.

Cook County Breakdown

Cases

Health Department 2023 2022 2021 2020 2019

Rates per 100,000 Population

Health Department 2023 2022 2021 2020 2019

2010 U.S. Census used for 2019 Rates. 2020 U.S. Census used for 2020-2023 Rates.

Lake County Breakdown

Cases

Health Department 2023 2022 2021 2020 2019

Rates per 100,000 Population

Health Department 2023 2022 2021 2020 2019

2010 U.S. Census used for 2019 Rates. 2020 U.S. Census used for 2020-2023 Rates.

St. Clair County Breakdown

Cases

Health Department 2023 2022 2021 2020 2019

Rates per 100,000 Population

Health Department 2023 2022 2021 2020 2019

2010 U.S. Census used for 2019 Rates. 2020 U.S. Census used for 2020-2023 Rates.

Demographic Data

Illinois Reported Primary and Secondary Syphilis Cases and Rates per 100,000 Population by Race/Hispanic Ethnicity

Cases

Race/Ethnicity 2023 2022 2021 2020 2019

Rates per 100,000 Population

Race/Ethnicity 2023 2022 2021 2020 2019

Rates for data are calculated based on 2010 and 2020 U.S. Census population.

Rate Ratio

Ratio 2023 2022 2021 2020 2019

Rate Ratio is calculated by dividing the rate of population 1 by the rate of population2 (r1/r2). The interpretation of the value of a rate ratio is that a rate ratio of 1.0 indicates equal rates in the two groups, a rate ratio greater than 1.0 indicates an increased risk for the group in the numerator, and a rate ratio less than 1.0 indicates a decreased risk for the group in the numerator.

Illinois Reported Primary and Secondary Syphilis Cases and Rates per 100,000 Population by Age

Cases

Age Group 2023 2022 2021 2020 2019

Rates per 100,000 Population

Age Group 2023 2022 2021 2020 2019

Rates for data are calculated based on 2010 and 2020 U.S. Census population.

Illinois Reported Primary and Secondary Syphilis Cases and Rates per 100,000 Population by Sex

Cases

Sex 2023 2022 2021 2020 2019

Rates per 100,000 Population

Sex 2023 2022 2021 2020 2019

Rates for data are calculated based on 2010 and 2020 U.S. Census population.