The researchers surveyed adults who had gambled in the past 12 months at two time points. The first survey was in April 2020 during the initial COVID-19 lockdown in Ontario, Canada. The second survey was in August 2020, when most lockdown measures had eased. The researchers identified three subgroups of participants. Subgroup 1 did not play online gambling games. Subgroup 2 played a wide range of online gambling games and reported a change in their gambling involvement. Some decreased their gambling whereas others increased their gambling. Subgroup 3 mainly played online lottery and reported no change in their gambling. The researchers found that change in online gambling was associated with poorer mental health over time, experiencing negative impacts on household income due to COVID-19, being more financially focused, and having more severe gambling problems.