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Prevalence of poor sleepers (A) and moderate/severe clinical insomnia condition (B) at the two assessments (Survey wave 1, Survey wave 2) for the respondents who increased, maintained unchanged, or reduced the usage of electronic devices before falling asleep. Significant results of the McNemar’s tests are reported with asterisks (* p < 0.05, ** p < 0.01, *** p < 0.001).
