title: The perception of sleep quality in kidney transplant patients during the first year of transplantation.
abstract: OBJECTIVE
  Poor sleep quality is one of the factors that adversely affects patient quality of life after kidney transplantation, and sleep disorders represent a significant cardiovascular risk factor. The objective of this study was to investigate the prevalence of changes in sleep quality and their outcomes in kidney transplant recipients and analyze the variables affecting sleep quality in the first years after renal transplantation.
  
  
  METHODS
  Kidney transplant recipients were evaluated at two time points after a successful transplantation: between three and six months (Phase 1) and between 12 and 15 months (Phase 2). The following tools were used for assessment: the Pittsburgh Sleep Quality Index; the quality of life questionnaire Short-Form-36; the Hospital Anxiety and Depression scale; the Karnofsky scale; and assessments of social and demographic data. The prevalence of poor sleep was 36.7% in Phase 1 and 38.3% in Phase 2 of the study.
  
  
  RESULTS
  There were no significant differences between patients with and without changes in sleep quality between the two phases. We found no changes in sleep patterns throughout the study. Both the physical and mental health scores worsened from Phase 1 to Phase 2.
  
  
  CONCLUSIONS
  Sleep quality in kidney transplant recipients did not change during the first year after a successful renal transplantation.
authors.affiliation: Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Renal Transplantation Service, Psychologist, São Paulo/SP, Brazil. II dnyelle.silva@yahoo.com
authors.forename: Dnyelle Souza
authors.initials: DS
authors.lastname: Silva
authors.forename: Elisangela dos Santos Prado
authors.initials: Edos S
authors.lastname: Andrade
authors.forename: Rosilene Motta
authors.initials: RM
authors.lastname: Elias
authors.forename: Elias
authors.initials: E
authors.lastname: David-Neto
authors.forename: William Carlos
authors.initials: WC
authors.lastname: Nahas
authors.forename: Manuel Carlos Martins de
authors.initials: MC
authors.lastname: Castro
authors.forename: Maria Cristina Ribeiro de
authors.initials: MC
authors.lastname: Castro
mesh_terms: D000328:Adult; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D016030:Kidney Transplantation / Q000009:adverse effects / Q000502:physiology* / Q000523:psychology; D008297:Male; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000453:epidemiology*; D013997:Time Factors