title: [Differences between age and gender in patients with micturition syncope].
abstract: OBJECTIVE
  To study the difference between age and gender in patients with micturition syncope (MS).
  
  
  METHODS
  A total of 56 patients with MS were diagnosed from 1 542(3-72 years old) cases with unexplained syncope or symptoms of presyncope during micturition in our hospital. The age, onset age, positive rate of head up tilt table test (HUTT) and their correlation with age and gender were analyzed.
  
  
  RESULTS
  The average age of patients with MS was older than that of patients with nonmicturition syncope (NMS)[5-67(35.5)years old vs. 3-72(12)years old,Z=-7.587,P<0.01]. Among the patients with MS, adults (>18 years old) were more than children (≤ 18 years old) (9.4% vs. 1.0%,χ2=65.689,P<0.01). There was gender difference in the onset rate of MS (male 5.0% vs. female 2.5%,χ 2=6.858,P<0.01). There was no difference in the positive rate of HUTT between the MS and NMS groups, and between the males and females with MS. There was no difference in age and onset age between the HUTT positive and negative group, and between the males and females.
  
  
  CONCLUSIONS
  MS occurs more often in adults and males. Bezold Jazisch reflex may play a role in the mechanism of MS.
authors.affiliation: Institute of Pediactrics, Central South University, Changsha 410011,China.
authors.forename: Lijia
authors.initials: L
authors.lastname: Wu
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Chunyan
authors.initials: C
authors.lastname: Hu
authors.forename: Ping
authors.initials: P
authors.lastname: Lin
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Cui
authors.forename: Heli
authors.initials: H
authors.lastname: Yuan
authors.forename: Zhenwu
authors.initials: Z
authors.lastname: Xie
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D012737:Sex Factors; D013575:Syncope / Q000175:diagnosis / Q000209:etiology*; D018667:Tilt-Table Test; D014554:Urination; D055815:Young Adult