HIV & AIDS Cases in Alameda County Presentation to the CCPC August 24, 2011 Elaine Bautista & Alex Marr
What is Epidemiology? The study of the distributions (who, where and when) and determinants (what and why) of morbidity (sickness) and mortality (death) among human populations
AIDS Epidemiology Terminology Proportion = Percent of cases Incidence = new cases in time period Prevalence = existing cases in time period Cumulative = all cases ever reported regardless if alive or deceased
Rate The occurrence of an event (disease), accounting for the size of the population Infers a measure of time Allows for comparisons of populations The number of cases occurring during a specific time period divided by the population during that time period Usually expressed per 1,000 or 100,000
Rate (Cont.)
Case Rate Example: the rate in Alameda County for 2000 is: and the rate among African Americans in 2000 is: * 100,000 Number of cases Total Population = Rate 225___ 1,443,741 x 100,000= 15.6 x 100,000 = 60.2 _127___ 211,124
When stratified by race and sex, some HIV diagnostic values are too low to ascertain a case rate. We present the full race breakdown by percentage of new HIV diagnoses. However, we focused on the following three races with high enough counts for the trend: Latino African American White As HIV surveillance by name was implemented in 2006, HIV diagnostic data before 2006 may not be comparable. For the purposes of this presentation, cases (including transgender cases) are categorized by the Sex at birth. Caveats – Potential Limitations
HIV/AIDS Diagnoses, Deaths and persons Living with HIV/AIDS Alameda Co.California Diagnosis of HIV, Diagnosis of AIDS, Average HIV/AIDS Rate, per 100, Cumulative diagnosis of HIV, ,41341,892 Cumulative diagnosis of AIDS infection, ,038159,329 Cumulative deaths in persons with HIV 231,385 Cumulative deaths in persons with AIDS 4,34588,842
HIV & AIDS Infections by Year of Diagnosis and Deaths among Persons with HIV Infection
HIV/AIDS Cases by Sex
Source: Centers for Disease Control and Prevention (CDC). eHARS. Atlanta, Georgia: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, [ ]. Number of Newly Reported HIV (non-AIDS) Cases, Alameda County
Annual HIV/AIDS Case rates by Race/Ethnicity and Year of Diagnosis
Source: Centers for Disease Control and Prevention (CDC). eHARS. Atlanta, Georgia: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, [ ]. Percentage of Newly Reported HIV (non-AIDS) Cases By Race/Ethnicity, Alameda County
Source: Centers for Disease Control and Prevention (CDC). eHARS. Atlanta, Georgia: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, [ ]. Percentage of Newly Reported HIV (non-AIDS) Cases By Race/Ethnicity, Alameda County
Newly Reported HIV/AIDS Infections by Reported Transmission Mode and Sex, Alameda County
Newly Reported HIV/AIDS Infections among Males by Reported Transmission Mode and Race/Ethnicity, Alameda County, Latino Males
Newly Reported HIV/AIDS Infections among Females by Reported Transmission Mode by Race/Ethnicity, Alameda County, Latina
Injection Drug Users (includes IDU and MSM&IDU)
Case Rates of Newly Reported HIV (non-AIDS) Cases by Race/Ethnicity, Alameda County Source: Centers for Disease Control and Prevention (CDC). eHARS. Atlanta, Georgia: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, [ ].
Case Rates of Newly Reported HIV (non-AIDS) Cases by Race/Ethnicity, Alameda County
HIV and AIDS Cases by Age Group Alameda County,
HIV (non-AIDS) Cases by Age Group, Alameda County
AIDS Cases by Age Group, Alameda County
Persons Living with HIV/AIDS Alameda County,
Demographic Characteristics of PLWH/A * (Includes cases residing in Alameda County but diagnosed elsewhere)
Case Fatality = the number of deaths in a sub-population MALES Race/ Ethnicity Cumulative Total HIV+ Cases #DeathsCase Fatality African Amer % Amer Ind/ AK Native % Asian/ Pac Isl % Latino % White % FEMALES Race/ Ethnicity Cumulative Total HIV+ Cases #DeathsCase Fatality African Amer % Amer Ind/ AK Native % Asian/ Pac Isl % Latina % White %
Late Testers The number of individuals who progress to AIDS within one year of initial HIV diagnosis. Includes those with HIV & AIDS simultaneous diagnosis. As a % of AIDS Cases = 47.2% As a % of all HIV Positive Cases = 40.1%
Late Testers
Percent Late Testers among each Demographic Characteristics (% of Group who were Late Testers)
Characteristics of Late Testers(n=3791)
Characteristics of Transgendered Persons in Alameda Co. # Cases
Conclusions The number of diagnosed HIV cases surpassed the number of AIDS cases in HIV/AIDS cases are predominantly among Males. Females comprise 15-20% of diagnosed cases. African Americans comprise the majority of HIV/AIDS cases, followed by Whites and Latinos. HIV/AIDS is diagnosed predominantly among individuals aged A slight increase in older adults age 50 years and above has been seen in recent years. New way of looking at Persons Living with HIV/AIDS to include new residents who were diagnosed elsewhere. New ways of looking at late testers. The use of the data will depend on the completeness of the surveillance data and the message being conveyed.