Received: 1 July 2020
Accepted: 4 December 2020
First Online: 18 December 2020
Ethics approval and consent to participate
: Not applicable. No specific ethics permissions were required for the present analyses, which were based on data already available from available ethics permission for the general population survey.
: Not applicable.
: TH, UR, JS, UP declare that they have no competing interests. AH declares research funding from Svenska Spel, a state-owned company operating in the gambling market in Sweden, from the research council of the Swedish alcohol monopoly (Systembolaget), as well as from the Swedish Sports Federation, the Swedish Enforcement Authority, and from the regional health care organization in southern Sweden.