Measures

Sociodemographic Questions were single items used to assess self-reported age, sex assigned at birth, race, ethnicity, education, and experience of homelessness in the past year.

The Short Inventory of Problems (SIP-2R) is a 15-item, Likert-scale questionnaire that measures firsthand alcohol-related harm encompassing physical, psychological, interpersonal, social, and impulse control issues. Instructions ask respondents to report how often an alcohol-related consequence has happened to them (e.g. “I have been unhappy because of my drinking”) on a 4-point scale (Never = 0, Daily or Almost Daily = 3; Miller et al., 1995a).

The Alcohol Quantity and Use Assessment (AQUA) measure comprises a series of open-ended questions asking participants about their quantity of alcohol use within a given timeframe, including alcohol type, unit size, and number of units consumed. This measure, used in conjunction with the Blood Alcohol Concentration Calculation System (Markham et al., 1993), yielded a single-item, self-report measure of alcohol quantity consumed on one’s peak drinking occasion in the past 2 weeks or 30 days, depending on the study (i.e., peak drinks) (Collins et al., 2015; Collins et al., 2012b; Collins et al., 2014; Larimer et al., 2009).