During COVID: Who slept better? Who slept worse? Recommendations for sleep frailty and sleep robustness

COVID 19 pandemic had worldwide negative repercussions. The overall prevalence of sleep disorders during Covid 19 was around 40%, with differences according to specific populations, more vulnerable or with greater exposure. Since sleep is a fundamental pillar of health and essential for survival and for physical and mental health it is essential to know what preserves and what deteriorates sleep in adverse situations. Objectives: Comparison of those who slept better, equal or worse, using a multimodal ecologic model. Methods: Sleep Quality and Awakening quality before and during the pandemic were used as referential measures. Analysis of variance of quantitative variables in COVID and pre-COVID stress was performed, and a linear discriminant analysis (LDA) was applied to classify the 3 sleep groups: Worse, Equal and Better. Results: Despite many statistical differences between groups, the LDA discrimination of subgroups ranged globally from 70 to 86%. Using LDA the Worse group was correctly classified with high correctness, from 74.3 to 97.3%; Equal group classification ranged from 67.1 to 97.7%; Better group however was correctly classified with low values (25.7 to 27.9%). LDA discrimination achieved higher values with Sleep Quality. Conclusion: The results are discussed and the recommendations focused on what you should or should not do, to avoid poor sleep in adverse conditions.