On May 13-18, 2022, the Kyiv International Institute of Sociology (KIIS) conducted its own all-Ukrainian public opinion poll "Omnibus". By the method of computer-assisted telephone interviews (CATI) based on a random sample of mobile telephone numbers (with random generation of telephone numbers and subsequent statistical weighing) were interviewed 2,000 respondents living in all regions of Ukraine (except AR of Crimea). The survey was conducted with adult (aged 18 and older) citizens of Ukraine who at the time of the survey lived in Ukraine (within the limits controlled by the Ukrainian authorities until February 24, 2022). The sample did not include residents of territories that were temporarily not controlled by the Ukrainian authorities until February 24, 2022 (AR of Crimea, Sevastopol, some districts of Donetsk and Luhansk regions), and the survey was not conducted with citizens who went abroad after February 24, 2022.

Formally, under normal circumstances, the statistical error of such a sample (with a probability of 0.95 and taking into account the design effect of 1.1) did not exceed 2.4% for indicators close to 50%, 2.1% for indicators close to 25%, 1.5% - for indicators close to 10%, 1.1% - for indicators close to 5%. Under the conditions of the war, in addition to this formal error, a certain systematic deviation is added, but the results obtained still remain highly representative and allow a fairly reliable analysis of public moods. Please see below for additional comments on the factors that influence the conduct of opinion polls in the military conditions.