• Romana Ulbrichtova, Peter Vysehradsky, Alica Bencova, Maria Tatarkova, Oto Osina, Viera Svihrova, and Henrieta Hudeckova.
• Department of Public Health, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, 036 01, Slovakia.
• Patient Prefer Adher. 2023 Jan 1; 17: 113711421137-1142.

PurposeThe aim of our study was to validate a Slovakian translation of the PAC‑19QoL instrument among Slovakian patients with post COVID-19 syndrome.Patients And MethodsThe PAC-19QoL instrument was translated into the Slovakian language and administrated to patients with post COVID-19 syndrome. Cronbach's alpha coefficient was used to analyse the internal consistency of the instrument. Construction validity was evaluated by using Pearson's correlation coefficient and Spearman's rank correlation. Scores of patients and controls were compared using Mann-Whitney U-test.ResultsForty-five asymptomatic and forty-one symptomatic participants were included. Forty-one patients with post COVID-19 syndrome completed the PAC-19QoL and EQ-5D-5L questionnaires. PAC-19QoL domain scores were significantly different between symptomatic and asymptomatic participants. All items achieved a Cronbach alpha greater than 0.7. There was a significant correlation between all domains on the test (p < 0.001), with the highest correlation of Total (r = 0.994) and Domain 1 (r = 0.991). Spearman's rank correlation analysis confirmed that the instrument items correlated with the objective PAC-19QoL examination findings.ConclusionThe Slovakian version of the instrument is valid, reliable and can be a suitable tool for research and daily clinical practice among patients with post COVID-19 syndrome.© 2023 Ulbrichtova et al.

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