Unrefreshing sleep following polysomnography: An analysis of daily habits and sleep metrics.

OBJECTIVE

Among subjects undergoing polysomnography (PSG), some subjects complain of unrefreshing sleep (URS) after in-laboratory PSG (lab-PSG). The purpose of this study was to clarify whether there are differences in the backgrounds of such subjects and their polysomnographic findings.

METHODS

We asked subjects undergoing lab-PSG for the diagnosis of sleep-related breathing disorders whether they had URS immediately after lab-PSG (PSG-URS) and compared their backgrounds and polysomnographic findings.

RESULTS

We conducted an analysis of 151 subjects undergoing lab-PSG. Multivariate analysis demonstrated that the presence of smoking up to six hours before PSG, total sleep time (TST), sleep efficiency (SE), sleep latency (SL), and wake time after sleep onset (WASO) were independent determinants of PSG-URS after adjusting for some factors.

CONCLUSION

Smoking up to 6 hours before PSG and short TST, small SE, long SL, and long WASO in PSG were significantly associated with the presence of PSG-URS.