• Samantha N Sallie, Valentin Ritou, Henrietta Bowden-Jones, and Valerie Voon.
• Department of Psychiatry, University of Cambridge, Cambridge, UK sns36@cam.ac.uk.
• BMJ Open. 2020 Nov 26; 10 (11): e044276.

ObjectivesThe COVID-19 pandemic has required drastic safety measures to control virus spread, including an extended self-isolation period. Stressful situations increase alcohol craving and consumption in alcohol use disorder (AUD) and non-AUD drinkers. Thus, we assessed how COVID-19 related stress may have affected drinking behaviours in the general population.DesignWe developed an online cross-sectional survey, Habit Tracker (HabiT), which measured changes in drinking behaviours before and during COVID-19 quarantine. We also assessed psychiatric factors such as anxiety, depression (Hospital Anxiety and Depression Scale) and impulsivity (Short-Impulsive Behavior Scale). Lastly, we related drinking behaviours to COVID-19 specific stress factors.SettingHabiT was released internationally, with individuals from 83 countries participating.ParticipantsParticipants were included if they were 18 years of age or older and confirmed they were proficient in English. The survey was completed by 2873 adults with 1346 usable data (46.9% accurately completed).Primary Outcome MeasuresPrimary outcome measures were change in amount and severity of drinking behaviours before and during quarantine, and current drinking severity during quarantine.ResultsAlthough drinking behaviours decreased overall during quarantine, 36% reported an increase in alcohol use. Those who increased alcohol use during quarantine were older individuals (95% CI 0.04 to 0.1, p<0.0001), essential workers (95% CI -0.58 to -0.1, p=0.01), individuals with children (95% CI -12.46 to 0.0, p=0.003), those with a personal relationship with someone severely ill from COVID-19 (95% CI -2 to -0.38, p=0.01) and those with higher depression (95% CI 0.67 to 1.45, p<0.0001), anxiety (95% CI 0.61 to 1.5, p=0.0002), and positive urgency impulsivity (95% CI 0.16 to 0.72, p=0.009). Furthermore, country-level subsample analyses indicated that drinking amount (95% CI 9.36 to 13.13, p=0.003) increased in the UK during quarantine.ConclusionsOur findings highlight a role for identifying those vulnerable for alcohol misuse during periods of self-isolation and underscore the theoretical mechanism of negative emotionality underlying drinking behaviours driven by stress. Limitations include a large degree of study dropout (n=1515). Future studies should assess the long-term effects of isolation on drinking behaviours.© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.

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