Nutrients · 4 authors, 3 centres
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A longitudinal cohort of 593 French adults completed four questionnaires spaced one month apart during and after the first COVID-19 lockdown in France, and cluster analysis identified three distinct patterns of behavioral change with differing weight trajectories. The mean weight gain after one month of lockdown was 0.56 kg, with changes in eating behaviors and body weight not being significant once restrictions were lifted.
This longitudinal cohort study assessed changes in dietary and lifestyle behaviors among 593 French adults (68.6% female, mean age 42.2 years) across four time points spaced one month apart, from the start of France's first COVID-19 lockdown on 17 March 2020 to one month after its end in mid-June 2020. K-means cluster analysis identified three behavioral patterns: cluster C1 (n=210) showed fewer changes in sleep and snacking but experienced nearly one kilogram of weight gain during lockdown; cluster C2 (n=200) reported lower stress levels and a slight weight decrease (−0.39 kg) during lockdown but the greatest weight gain (0.76 kg) afterward; cluster C3 (n=183) had more degraded sleep quality throughout lockdown and an average weight increase of 1.2 kg. Overall mean weight gain after one month of lockdown was 0.56 kg. Limitations include reliance on self-reported data, a non-representative sample (predominantly from Grenoble, high education, relatively low overweight rate), and the observational design precluding causal inference.
