+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Estimates of intraclass correlation for variables related to behavioral HIV/STD prevention in a predominantly African American and Hispanic sample of young women

Estimates of intraclass correlation for variables related to behavioral HIV/STD prevention in a predominantly African American and Hispanic sample of young women

Health Education & Behavior 36(1): 182-194

Studies designed to evaluate HIV and STD prevention interventions often involve random assignment of groups such as neighborhoods or communities to study conditions (e.g., to intervention or control). Investigators who design group-randomized trials (GRTs) must take the expected intraclass correlation coefficient (ICC) into account in sample size estimation to have adequate power; however, few published ICC estimates exist for outcome variables related to HIV and STD prevention. The Prevention Options for Women Equal Rights (POWER) study was a GRT designed to evaluate a campaign to increase awareness and use of condoms among young African American and Hispanic women. The authors used precampaign and postcampaign data from the POWER study to estimate ICCs (unadjusted and adjusted for covariates) for a variety of sexual behavior and other variables. To illustrate the impact of ICCs on power, the authors present sample-size calculations and demonstrate how ICCs of differing magnitude will affect estimates of required sample size.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 053036773

Download citation: RISBibTeXText

PMID: 19188372

DOI: 10.1177/1090198108327731

Related references

Intraclass correlation among measures related to cigarette use by adolescents: Estimates from an urban and largely African American cohort. Addictive Behaviors 27(4): 509-527, July-August, 2002

Intraclass correlation estimates in a school-based smoking prevention study. Outcome and mediating variables, by sex and ethnicity. American Journal of Epidemiology 144(4): 425-433, 1996

Intraclass correlation among measures related to alcohol use by young adults: estimates, correlates and applications in intervention studies. Journal of Studies on Alcohol 56(6): 681-694, 1995

Knowledge, beliefs and behaviours related to STD risk, prevention, and screening among a sample of African American men and women. Health Education Journal 73(3): 332-340, 2014

The Use Of Self-Managed Treatment Strategies In A Predominantly Low-Income, African-American Sample Of Women Living With Hiv. Psychological Reports 116(3): 861-869, 2015

The relationships among sexually transmitted infection, depression, and lifetime violence in a sample of predominantly African American women. Research in Nursing & Health 30(4): 413-428, 2007

Depression, stress and body fat are associated with binge eating in a community sample of African American and Hispanic women. Eating and Weight Disorders 18(2): 221-227, 2014

Genetic variations in magnesium-related ion channels may affect diabetes risk among African American and Hispanic American women. Journal of Nutrition 145(3): 418-424, 2015

Social Support and Self-Reported Stress Levels in a Predominantly African American Sample of Women with Systemic Lupus Erythematosus. Autoimmune Diseases 2015: 401620-401620, 2015

Folic acid consumption and blood folate levels in a sample of pregnant Hispanic and African American women. American Journal of Epidemiology 157(11 Suppl.): S8, 2003

Lower liver-related death in African American Women with HIV/HCV co-infection compared to caucasian and hispanic women. 2012

Measurement properties of the centers for epidemiological studies depression scale (CES-D) in a sample of African American and non-Hispanic White pregnant women. Journal of Nursing Measurement 17(2): 91-104, 2009

Teacher and parent perceptions of behavior problems among a sample of African American, Hispanic, and non-Hispanic white students. American Journal of Community Psychology 23(2): 181-197, 1995

Substance use and risk taking behaviors among Urban, Low income, African American and Hispanic young women. PHILADELPHIA SCIENCES GROUP HIV infection in women: Setting a new agenda: P118, 1995