title: Prevalence of Sleep Disordered Breathing among Patients with Nocturia at a Urology Clinic.
abstract: OBJECTIVE
  We assessed the prevalence of sleep disordered breathing (SDB) and characteristics among patients who visited a urology clinic complaining of nocturia (URO group) and those who visited a sleep apnea (SA) clinic complaining of excessive daytime sleepiness (EDS) (SA group). Additionally, we evaluated the effects of continuous positive airway pressure (CPAP) therapy in the URO group patients with nocturia and SDB resistant to conventional therapy for nocturia.
  
  
  METHODS
  Questionnaires were used to assess EDS, nocturia and lower urinary tract symptoms in 34 URO group patients and 49 age-matched SA group patients. We also compared these factors in the male patients in both groups and the male and female patients in the SA group. Significant SDB was diagnosed as a 3% oxygen desaturation index (3%ODI) on pulse oximeter of >5/h. The treatment response was analyzed in six URO group patients treated with CPAP after not responding to the conventional medical treatment.
  
  
  RESULTS
  SDB was found in 91.8% of the SA group patients and 70.6% of the URO group patients. The level of EDS and lower urinary tract symptoms were similar in both groups. The SA group showed higher 3%ODI values, while the frequency of urination during bedtime was higher in the URO group. The frequency of nocturnal urination was reduced after CPAP in the subjects resistant to conventional therapy.
  
  
  CONCLUSIONS
  SDB is as prevalent in patients who visit a urology clinic complaining of nocturia as in those who visit a sleep apnea clinic. Patients who complains of nocturia must be assessed for SDB before starting therapy for nocturia.
authors.affiliation: Sleep Apnea Center, Kyushu University Hospital, Japan.
authors.forename: Umpei
authors.initials: U
authors.lastname: Yamamoto
authors.forename: Mari
authors.initials: M
authors.lastname: Nishizaka
authors.forename: Chikara
authors.initials: C
authors.lastname: Yoshimura
authors.forename: Nobutoshi
authors.initials: N
authors.lastname: Kawagoe
authors.forename: Atsumi
authors.initials: A
authors.lastname: Hayashi
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kadokami
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Ando
mesh_terms: D045422:Continuous Positive Airway Pressure / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D053158:Nocturia / Q000453:epidemiology*; D010092:Oximetry; D015995:Prevalence; D012891:Sleep Apnea Syndromes / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy*; D014572:Urology