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Haraldsson's Questionnaire
Please email the authors for information about obtaining the instrument:
Supplemental: Parkinson's Disease (PD)
Short Description of Instrument
This self-report questionnaire includes 5 questions related to snoring, breathing cessation during sleep, mid-sleep awakening, sleep-onset  difficulty,  and daytime sleepiness.
Each question has 5 responses options related to the frequency of the situations. The answers were coded as a 'Yes' for constant symptom and as a 'No' for never or occasional symptom.
Haraldsson PO, Carenfelt C, Knutsson E, Persson HE, Rinder J. Preliminary report: validity of symptom analysis and daytime polysomnography in diagnosis of sleep apnea. Sleep 1992; 15:261-263.