Carried out on June 1-9, the survey shows that 77 percent believe that Russia's military invasion would last more than a year. In March, around a month after the start of the invasion, 29 percent thought so.
The proportion of those saying they have been affected by and concerned about the war has also increased, going up to 72 percent in June from 67 percent in March.
Renata Sadunishvili, market research and insight director at Kantar, says 84 percent of Lithuania's population mentioned the war as their key concern, with other issues, including inflation, rising prices, the COVID-19 pandemic, being 3 to 4 times less important for them.
According to the survey, seven out of ten people say they continue to help Ukraine and refugees, mainly by donating money, but also providing other items.
"62 percent of Lithuanian residents say that sanctions for Russia should stay further, even if they have economic consequences for our country. People express such backing despite the fact that expectations of a quick end to the war are not improving. Quite the contrary, the number of people who think that the war will last a year or more has increased, and now the absolute majority thinks so," Sadunishvili said.
The survey involved 600 Lithuanian respondents aged between 18 and 65, with a margin of error of 3 percent.
The survey was carried out for the second time in Lithuania, Latvia and Estonia, as well as in the Czech Republic, Slovakia, Romania, Hungary, Austria, Bulgaria and Serbia.