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Table 4 Correlates of poor sleep quality in euthymic bipolar subjects ( n= 119)

From: Sleep quality during euthymia in bipolar disorder: the role of clinical features, personality traits, and stressful life events

Domain Bivariate Multivariable regression models a Unified multivariable regression model b
r β( p) β( p)
Sociodemographic   Adjusted R2 = .09 Adjusted R2 = .20
 Married −.23 (.01) −.21 (.02) -
 Age 4 × 10−3 - -
 Menopausal status (F) .01 - -
 Sex .04 - -
 Employed −.13 - -
Medical and anxiety disorder comorbidities   Adjusted R2 = .11  
 Cardiovascular disease .20 (.03) .16 (.08) -
 BMI .17 (.07) - -
 Diabetes .05 - -
 Migraine .13 - -
 Alcohol use disorders .16 (.08) - -
 Drug use disorders .17 (.07) .17 (.07) -
 Anxiety disorder −.09 - -
Features of BD   Adjusted R2 = .15  
 Suicide attempts .31 (1 × 10−3) .22 (.02) -
 Rapid cycling .30 (1 × 10−3) .20 (.04) .20 (.03)
 Mixed episodes .20 (.04) - -
 Mixed symptoms .13 - -
 Psychosis .11 - -
Severity/symptom measures   Adjusted R2 = .06  
 Age at onset −.20 (.03) −.18 (.07) -
 Depression (number of episodes) .33 (<1 × 10−3) - -
 Mania (number of episodes) .16 (.09) - -
  Hypomania (number of episodes) .23 (.01) - -
  Current symptom state    
  HDRS 17 .11 - -
  HDRS 21 with atypical symptoms .24 (.01) - -
  YMRS −.01 - -
Chronotype and sleepiness   Adjusted R2 = .10  
 MCTQ chronotype .24 (.01) .23 (.01) -
 ESS sleepiness .16 (.08) - -
Personality assessment   Adjusted R2 = .13  
 NEO-PI neuroticism .35 (<1 × 10−3) .31 (1 × 10−3) .28 (2 × 10−3)
 NEO-PI extraversion −.01 - -
 NEO-PI openness .06 - -
 NEO-PI agreeableness −.01 - -
 NEO-PI conscientiousness −.17 (.08) - -
Life story   Adjusted R2 = .11  
 LEOS undesirable events .26 (.01) .27 (.01) .20 (.02)
 CTQ childhood trauma .19 (.04) - -
 LEC stressful life events .09 - -
 FACES-II cohesion −.20 (.03) - -
 FACES-II adaptability −.15 - -
 MRCIR social support −.20 (.03) - -
 MRCIR undermining .10 - -
Behavioral    
 AUDIT alcohol −.07 - -
 AUDIT drugs −.10 - -
 FTND nicotine dependence .13 - -
  1. aSet of predictors in a series of linear regressions with backward selection in each domain after adjusting for depressive symptoms (β ranges from .17 to .26, p < .07); bmultivariable linear regression, final model obtained through backward selection.