The American College Health Association-National College Health Assessment (ACHA-NCHA) is a nationally recognized research survey of collegestudents’ health habits, behaviors, and perceptions. Institutions of higher education throughout the country participate in the ACHA-NCHA. The web-survey has been completed by Georgia Tech students, on a bi-yearly basis, since 1994. The ACHA-NCHA survey contains approximately 300 questions to assess health status, health problems, risky and protective health behaviors, and perceived norms in areas including: injury prevention, personal safety and violence; alcohol, tobacco, and other drug use; sexual health and behaviors, weight, nutrition, exercise, and mental health.
The data from the ACHA-NCHA survey are essentially a snapshot in time of the behaviors and attitudes of Georgia Tech students with regard to health behaviors. Stratified random sampling was used to obtain a sample of students. Georgia Tech’s Institutional Review Board (IRB) approved the research protocol. Missing values have been excluded from analysis. The response rates were 23% in 2009 and 9% in 2011. Most ACHA-NCHA web surveyors experience a range of 10% to 35% return. The average response rate is about 20%. We compared the following variables, between the data set and enrollment at Georgia Tech, to determine the need for weighted variables: ethnicity, gender, and year in school. Analysis was performed on weighted data (i.e., gender) for the year 2011.