Longitudinal and self‐attributed change in alcohol use among young adults during the COVID‐19 pandemic in Australia.

Introduction: The COVID‐19 pandemic introduced a unique concern regarding the potential for pandemic‐related increases in alcohol use. However, most studies which have measured pandemic‐related changes to date utilise self‐attribution measures of changes in alcohol use using cross‐sectional designs, which rely on accurate self‐attributions for validity. There has been minimal investigation of correspondence of self‐attributed and longitudinally measured changes in alcohol use during the pandemic. The current study seeks to examine this correspondence. Methods: A total of 856 participants originally recruited from Australian secondary schools completed follow‐up surveys of an ongoing study at two timepoints (2018–2019, mean age 18.6 and 2020–2021, mean age 19.9; 65.3% female). Alcohol use was measured as any drinking (1+ drinks) and binge drinking (5+ drinks) frequency in the past 6 months. The correspondence and relationship between 'longitudinal change' measured from the first to the second timepoint and 'self‐attributed change' measured at the second timepoint were examined. Results: For both any drinking and binge drinking frequency, moderate correspondence was observed between self‐attributed and longitudinal change in drinking (37.1% and 39.3%). Most participants with longitudinal increases in any drinking or binge drinking frequency failed to correctly self‐attribute this increase. Discussion and Conclusions: The findings suggest that self‐attributed increases do not correspond well with longitudinally measured increases in pandemic‐related drinking and may underestimate increases measured longitudinally. Method of measurement needs to be taken into account if data are to be used to identify sub‐groups at risk of alcohol use increases and facilitate appropriate direction of public health efforts. [ABSTRACT FROM AUTHOR]