Quantitative information

App use data was collected and extracted from the study administration tool. All other quantitative data relevant to this study was collected in the primary study via self-report diagnostic telephone interviews and web-based assessments. For this study only descriptive outcomes for socio-demographic data and abstinence self-efficacy at baseline were included.

Socio-demographic data included age, gender, level of education, employment status, current occupation, location of residency, and previous diagnosis of other psychological disorders.

Abstinence motivation and abstinence self-efficacy. Abstinence motivation for the coming six months was assessed as well as confidence levels of achieving this abstinence on a rating scale of 1 (not confident at all) to 5 (very confident).

App use behavior was explored by log data and assessed by utilizing the number of days of active app use, the number of resolved tasks, the number of enters of the emergency area and the number of enters of the motivation area – in total and before and after the return to alcohol use. Alcohol use is defined here as any consumption of alcohol the previous day. Furthermore reported abstinence data was explored by using reported days of abstinence and alcohol use in the abstinence tracker.

Data is presented per person and additionally by presenting mean (M), standard deviation (SD), median (Mdn), range and interquartile range (IQR) per assessment time point.