Online Program

Consistency of self-reported drug use events in a mixed methods study of injection drug users

Monday, November 4, 2013

Stephanie R. Dyal, BS, Department of Preventive Medicine, University of Southern California, Keck School of Medicine, Los Angeles, CA
Ricky N. Bluthenthal, PhD, Institute for Prevention Research, Keck School of Medicine, University of Southern California, Los Angeles, CA
Lynn Wenger, MSW, MPH, Urban Health Program, RTI International, San Francisco, CA
Alex H. Kral, PhD, Urban Health Program, RTI International, San Francisco, CA
Objectives: We illustrate the use of intraclass correlation coefficient (ICC) to assess the consistency of information provided during a mixed methods study of injection drug users living in Los Angeles and San Francisco. Background: Mixed methods research is gaining popularity in public health research. Little is known about the consistency of information provided during quantitative and qualitative portions of studies. Methods: Age of first use and first injection of heroin, methamphetamine, marijuana (use only), and cocaine/crack cocaine was provided during an in-person computer-assisted quantitative interview followed by an in-depth qualitative interview (n=62). Qualitative and quantitative data were used to create timelines detailing events in participants' lives, separate per participant (Timeline Maker Professional). Timelines were used to create a dataset containing nine items per participant containing age in years at which drug use events occurred from both quantitative and qualitative data sources. Items that the participant had not experienced or did not provide data for in both the quantitative and the qualitative interviews were excluded. Ages that were within 1 year of each other in the qualitative and quantitative interviews were considered to be in agreement and recoded to have the same age. Stata 11.2 was used for analyses. Results: ICCs ranged from .42-.95 (n=9-53). Data indicate age of first drug injection is reported more consistently than age of first drug use; age of first marijuana use was the least consistently reported item. Discussion: Consistency of self-reported data was adequate for most drug use events in this mixed method study.

Learning Areas:

Biostatistics, economics
Conduct evaluation related to programs, research, and other areas of practice
Public health or related research
Social and behavioral sciences

Learning Objectives:
Name which drug use events are reported with the most consistency.

Keyword(s): Injection Drug Users, Methodology

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I have assisted in multiple capacities on NIH funded research studies for the past 6 years, and have focused on substance use research for the past 3 years. I am interested in research methodology as it applies to substance use research.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.