title: An assessment of sleep quality in patients undergoing total knee arthroplasty before and after surgery.
abstract: OBJECTIVE
  The aim of this study was to compare the sleep quality of patients who underwent total knee arthroplasty before and after the surgery and analyze the effect of total knee arthroplasty on sleep quality.
  
  
  METHODS
  The study included 42 patients (32 females, 10 males) who underwent total knee arthroplasty for primary knee osteoarthritis. For each patient the preoperative 1 day and postoperative 3 months results of Pittsburgh Sleep Quality Index (PSQI) and 100-mm visual analogue scale (VAS) were compared.
  
  
  RESULTS
  The preoperative mean PSQI was 9. VAS score decreased in 97.6% of the patients, while sleep quality increased in 78.6%. 85.7% of the patients reported to have less episodes of pain related sleep disturbances. While both the PSQI and VAS improved after the surgery, there was no correlation between the parameters (p>0.05).
  
  
  CONCLUSIONS
  Our results suggested that total knee arthroplasty surgery relieves pain and improves sleep quality. The improvement in sleep quality does not appear to be related to pain relief.
authors.affiliation: Department of Orthopedics and Traumatology, Afyon Kocatepe University Faculty of Medicine, Afyonkarahisar, Turkey.
authors.forename: Mehmet Serhan
authors.initials: MS
authors.lastname: Er
authors.affiliation: Vocational School of Health Services, Akdeniz University, Antalya, Turkey.
authors.forename: Elif Cihan
authors.initials: EC
authors.lastname: Altınel
authors.affiliation: Department of Orthopedics and Traumatology, Akdeniz University Faculty of Medicine, Antalya, Turkey.
authors.forename: Levent
authors.initials: L
authors.lastname: Altınel
authors.affiliation: Department of Orthopedics and Traumatology, Afyon Kocatepe University Faculty of Medicine, Afyonkarahisar, Turkey.
authors.forename: Recep Abdullah
authors.initials: RA
authors.lastname: Erten
authors.affiliation: Department of Orthopedics and Traumatology, Afyon Kocatepe University Faculty of Medicine, Afyonkarahisar, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Eroğlu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D015897:Comorbidity; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000453:epidemiology / Q000601:surgery*; D010147:Pain Measurement; D011184:Postoperative Period; D057234:Preoperative Period; D012890:Sleep; D012893:Sleep Wake Disorders / Q000453:epidemiology