OBJECTIVES: To describe reported sleep and po1ysomnographically measured sleep andinvestigate its re1ationship.
DESIGN: A descriptive compa1'ative study.
SETTlNG: On the waiting-list for heart surgery.
PATIENTS: A consecutive sample, 44 men, aged 45-70.
OUTCOME MEASURES: Sleep and CAD.
RESULTS: Twenty-two patients (50 %) had combined complaints of sleep difficulties.Po1ysomnographically recorded nocturnai sleep duration was 368 ± 72 minutes anddaytime sleep 35 minutes. Subjective1y and objective1y measured sleep were similar. Ahighe1' anxiety 1eve1 was associated with more stage 1 sleep (r=0.39, p<O.Ol) andfrägmented sleep (r=0.54, p=O.OOOl). mereased difficulties maintaining sleep we1'eassociated significantly with less stages 3-4 sleep (r=-0.35, p<0.02), less REM sleep (1'=0.33,p<0.03) and increased arousa1s/movements (r=0.35, p=0.02). The prevalence ofdaytime napping was high. A higher degree of being physically tired was associated withless stages 3-4 sleep (p<0.05).
CONCLUSION: Po1ysomnographically recorded sleep pattems we1'e consistent withreported sleep. Sleep disturbances are common in patients with verified obstructive CAD.