title: Disturbances in postural balance are common in postmenopausal women with vasomotor symptoms.
abstract: OBJECTIVE
  To establish the prevalence of unsteadiness and rotatory vertigo in peri- and postmenopausal women, and whether balance disturbances are more common in women with vasomotor symptoms and without hormone replacement therapy (HRT).
  
  
  METHODS
  A validated questionnaire was sent to all 1523 women aged 54 or 55 years in Linköping, Sweden.
  
  
  RESULTS
  Daily or weekly unsteadiness was reported by 5%, and daily or weekly rotatory vertigo by 4% of all women. The frequency of vasomotor symptoms correlated with reported unsteadiness (rs = 0.23, p < 0.001). Fourteen per cent of women with daily vasomotor symptoms reported weekly or daily unsteadiness, compared with 3% of those without vasomotor symptoms (odds ratio (OR) 7.58, 95% confidence interval (CI) 3.72-15.45). The frequency of vasomotor symptoms correlated with rotatory vertigo (rs = 0.19, p < 0.001). Ten per cent of women with daily vasomotor symptoms reported weekly or daily rotatory vertigo, compared with 2% of women without vasomotor symptoms (OR 5.21, 95% CI 1.07-25.52). No correlation was seen between vasomotor symptoms and falls. Users of HRT had the same prevalence of balance disturbances as non-users.
  
  
  CONCLUSIONS
  Women with frequent vasomotor symptoms seem to run a greater risk of unsteadiness and rotatory vertigo than do women without symptoms. This association may not be explained by means of a cross-sectional study, but there might exist a causal connection between vasomotor symptoms and balance disturbances.
authors.affiliation: Division of Obstetrics and Gynecology, Department of Health and Environment, Faculty of Health Sciences, University Hospital, Linköping, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Ekblad
authors.forename: A
authors.initials: A
authors.lastname: Bergendahl
authors.forename: P
authors.initials: P
authors.lastname: Enler
authors.forename: T
authors.initials: T
authors.lastname: Ledin
authors.forename: C
authors.initials: C
authors.lastname: Möllen
authors.forename: M
authors.initials: M
authors.lastname: Hammar
mesh_terms: D004244:Dizziness / Q000453:epidemiology; D015914:Estrogen Replacement Therapy; D005260:Female; D019584:Hot Flashes / Q000453:epidemiology*; D006801:Humans; D008875:Middle Aged; D017698:Postmenopause; D004856:Postural Balance; D011187:Posture; D011795:Surveys and Questionnaires; D014666:Vasomotor System; D014717:Vertigo / Q000453:epidemiology