“…), and status of the drinker (current drinker, former drinker, social drinker, etc .). In an Italian case–control study, 25 the researchers explored the effect of varied alcohol dosages, and types and states of drinking in BE risk, and this study showed U-shaped dose–response relationships between red wine consumption, white wine consumption and BE risk, especially for current drinkers, which means that the BE risk initially decreases as the frequency or years of alcohol consumption increase, but after reaching a certain level, the BE risk starts to increase, and this may explain why social drinking (rarely or sometimes drink) decreased the BE risk when compared to nondrinking, as discovered by the abovementioned study; 43 however, this U-shaped dose–response effect was not observed among other types of drinking, such as beer, and liquor/spirit consumption, which might be caused by different alcohol concentrations and compositions that feature in diverse types of drinking. Though the selection of alcohol intake frequency in the touchscreen questionnaire includes (1) daily or almost daily; (2) three or four times a week; (3) once or twice a week; (4) one to three times a month; (5) special occasions only; (6) never; and (7) prefer not to answer, we were unable to conduct a frequency-stratified or wine type-stratified sub-analysis due to the lack of summary-level GWAS data for different frequencies of alcohol intake or types of wine in our MR analysis.…”