Insomnia Disorder in Shift / night workers
| Key things to know | What the evidence shows |
|---|---|
| How common is it? | Insomnia prevalence 12.8–76.4% across shift-work studies; Shift Work Disorder 26.5% pooled, but SWD ≠ insomnia disorder |
| Is it more common among shift / night workers? | Markedly elevated sleep problems |
| Are shift / night workers at higher risk? | #N/A |
| How much higher is the risk? | Shift workers: insomnia 12.8–76.4%; SWD pooled 26.5% |
| How often can it be missed? | Very High |
| Does it show up differently among shift / night workers? | Very Strong Yes |
| How might it look different? | Circadian misalignment causes sleep difficulty at biologically inappropriate times; distinguish Insomnia Disorder from Shift Work Disorder |
| What commonly occurs alongside it? | Shift Work Disorder; depression; anxiety |
| What can it be confused with? | Shift Work Disorder; circadian rhythm disorder; insufficient sleep |
| Common screening tool | ISI — Insomnia Severity Index |
| Separate screening tool for shift / night workers | Shift Work Disorder Screening Questionnaire / ICSD-based SWD assessment if specifically evaluating SWD, not insomnia |
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