Fig. 4From: A meta-analysis of systematic reviews and meta-analyses to evaluate the psychological consequences of COVID-19a Random-effects meta-regression between Sleep Problem rate and sample size, b Forest plot of Subgroup random-effects meta-analysis of Sleep Problem, c Funnel plot and Trim&Fill in Sleep Problem, d Forest plot of insomnia, e Random-effects meta-regression between Insomnia rate and sample size, f Forest plot of Subgroup random-effects meta-analysis of insomnia. (All of the Forest plots are the last representative of the whole forest plot due to the high number of included studies)Back to article page