# Free sleep screening questionnaires

82–93% of moderate-to-severe sleep apnea goes undiagnosed. These five one-minute instruments are the same validated questionnaires used in clinical practice. They are screens, not diagnoses.



- [STOP-BANG](stop-bang) — Obstructive sleep apnea risk, 8 questions

- [Epworth Sleepiness Scale](epworth-sleepiness-scale) — Excessive daytime sleepiness (hypersomnolence), 8 questions

- [Insomnia Severity Index](insomnia-severity-index) — Insomnia severity over the last 2 weeks, 7 questions

- [Restless Legs Screen](restless-legs-screen) — Restless legs syndrome (IRLSSG essential criteria), 5 questions

- [Reduced Morningness–Eveningness](reduced-morningness-eveningness) — Chronotype (morning / evening preference), 5 questions

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

SleepShred for iPhone: https://apps.apple.com/app/id6802040541