Changes in body weight in various population groups in Poland during the COVID-19 pandemic - a comparison of two cross-sectional studies

The disruption of daily activities caused by the COVID-19 pandemic had health consequences, especially during peak lockdown periods. The aim of the study is to assess the impact of the first year of the COVID-19 pandemic on the process of weight change among Polish adults. Two representative studies involving Polish adults aged 18-65 years were conducted, the first in June 2020 (N = 2527, from the perspective of the last 2-3 months), and the second a year later, in June 2021 (N = 2087, covering the last 12 months). Both surveys included two groups of respondents, and conducted using the CAWI method - computer-assisted web interview. In the first period of the COVID-19 pandemic, there were more individuals with obesity than a year later (18.7% vs 19.9%), and more respondents reported weight change in 2020 than in 2021 (53% vs 49.6%). In both surveys, women were more likely to report weight gain than men (p