title: Subjective sleep quality, objective sleep characteristics, insomnia symptom severity, and daytime sleepiness in women aged 50 and older with nonmetastatic breast cancer.
abstract: OBJECTIVE
  To examine subjective sleep quality in women aged 50 and older as predicted by cancer status, age, number of comorbidities, and symptoms of depressed mood; and to describe objective sleep characteristics, insomnia symptom severity, and daytime sleepiness.
  
  
  METHODS
  Descriptive.
  
  
  METHODS
  Urban university and private oncology clinics in the southern United States.
  
  
  METHODS
  32 women with and 35 without nonmetastatic breast cancer, aged 50-90 years (X=64.9, SD=4.67).
  
  
  METHODS
  Two telephone interviews, the Pittsburgh Sleep Quality Index, Profile of Mood States, three days of home actigraphy, Insomnia Severity Index, Epworth Sleepiness Scale, and medical records review.
  
  
  METHODS
  Subjective quality of sleep; secondary objectives were sleep characteristics, insomnia symptoms, and daytime sleepiness.
  
  
  RESULTS
  Poor subjective sleep quality was predicted by depressed mood (p<0.00005). All mean objective sleep characteristics were similar for the breast cancer and comparison groups. Nocturnal awakenings were excessive (9.2 versus 7.3). Mean sleep onset latency was longer for the breast cancer group than for the comparison group (34.8 versus 15.6 minutes). Mean insomnia severity scores for the breast cancer group indicated subthreshold insomnia symptoms, and no clinically significant insomnia for the comparison group (8.9 versus 6.4). Mean daytime sleepiness scores were normal for both groups (7 versus 6).
  
  
  CONCLUSIONS
  Subjective sleep quality was predicted by depressed mood only. Sleep in the breast cancer group was characterized by poor sleep quality, frequent nocturnal awakenings, and insomnia symptoms.
  
  
  CONCLUSIONS
  Screening and monitoring in women aged 50 and older with breast cancer may help promote early sleep intervention; however, additional collaborative research regarding the underlying causes of sleep disruption is needed.
authors.affiliation: College of Nursing, University of Arkansas for Medical Sciences, Little Rock, USA. caenderlin@uams.edu
authors.forename: Carol A
authors.initials: CA
authors.lastname: Enderlin
authors.forename: Elizabeth Ann
authors.initials: EA
authors.lastname: Coleman
authors.forename: Catherine
authors.initials: C
authors.lastname: Cole
authors.forename: Kathy C
authors.initials: KC
authors.lastname: Richards
authors.forename: Robert L
authors.initials: RL
authors.lastname: Kennedy
authors.forename: Julia A
authors.initials: JA
authors.lastname: Goodwin
authors.forename: Laura F
authors.initials: LF
authors.lastname: Hutchins
authors.forename: Karen
authors.initials: K
authors.lastname: Mack
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology / Q000473:pathology* / Q000523:psychology; D016022:Case-Control Studies; D015897:Comorbidity; D003863:Depression / Q000453:epidemiology; D059026:Diagnostic Self Evaluation; D020920:Dyssomnias / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology*; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology; D014481:United States / Q000453:epidemiology