Sample size considerations when groups are the appropriate unit of analysis.

This article discusses issues to be considered by nurse researchers when groups should be used as the unit of randomization. Advantages and disadvantages are presented, with statistical calculations needed to determine the effective sample size. Examples of these concepts are presented using data from the Black Cosmetologists Promoting Health Program.

African-American women's perceptions of their most serious health problems.

African Americans experience a disproportionate burden of illness. According to the Centers for Disease Control and Prevention (CDC), heart disease, cancer, cerebrovascular disease and diabetes are the most common causes of mortality among African Americans. Data were gathered from 1,055 African-American women to gain their perspectives of the most serious health problems affecting African-American women and their related knowledge, attitudes and health promoting behaviors.

Black cosmetologists promote diabetes awareness and screening among African American women.

Purpose: his study evaluated several factors that were thought to contribute to African American women's disproportionate incidence and sequelae of diabetes.

Methods: African American women (1055) living in San Diego County completed surveys about diabetes-related beliefs, screening behaviors, knowledge, and attitudes. Participants' ages ranged from 20 to 94 years, and 33.