For questions regarding alcohol use, reference was made to alcohol units per day. A standard drink (one alcohol unit) was defined as 10 g of pure alcohol. This corresponds to one 25 cL glass of beer (5% alcohol), 10 cL of wine (12% alcohol), 5 cL of aperitif (15% alcohol), or 3.5 cL of distilled spirits (35% alcohol). Respondents were asked how much alcohol he/she drank on an average day before the COVID-19 measures and how much he/she is drinking now (during the lockdown measures), with additionally specifying whether he/she drank more, less, or about the same than before. Response options referred to the average quantity of alcohol consumption during the prior week (rather than the frequency) and included the options “I do not drink alcohol” (mean of 0 alcohol units per day) and “on average 1 alcohol unit per day” to “on average >12 alcohol units per day,” with specifically denoting whether they drank more, less, or about the same as usual.