Misperception of sleep in bipolar disorder: an exploratory study using questionnaire versus actigraphy

International Journal of Bipolar Disorders

Table 2 Associations between misperception of sleep and demographic and clinical variables

Continuous variables	TST misperception		SL misperception		SE misperception
Continuous variables	Rho	P	Rho	P	Rho	P
Age	.160	.025	.143	.046	.056	.433
MADRS	.142	.047	.189	.008	.160	.025
YMRS	.019	.792	.103	.152	.063	.379
Daily coffee intake	.025	.733	.000	.999	.045	.531
Daily alcohol intake	−.078	.275	−.161	.024	.089	.216
Daily cigarette intake	−.009	.902	−.016	.828	.021	.773

Categorical variables	p value (t-test)	p-value (t-test)	p-value (t-test)
Sex	.067	.214	.497
OSA risk	.001	.215	.420

MADRS Montgomery and Asberg Depression Rating Scale, YMRS Young’s Mania Rating Scale, OSA risk any positive score related to obstructive sleep apnea on The Berlin Questionnaire, TST total sleep time, SL sleep latency, SE sleep efficiency