title: Association of vitamin D deficiency with muscle strength and quality of life in postmenopausal women.
abstract: OBJECTIVE
  The aim of this study was to analyze the effect of vitamin D deficiency on muscle strength and quality of life in postmenopausal women.
  
  
  METHODS
  Self-sufficient, community-dwelling, postmenopausal women over 55 years old attending the Physical Medicine and Rehabilitation outpatient clinic were included in the study. 25-Hydroxyvitamin D levels below 20 ng/ml were accepted as indicative of vitamin D deficiency. A computerized isokinetic dynamometer (Cybex 770 Norm, Lumex Inc., Ronkonkoma, NY, USA) was used for testing knee extensor muscle strength.
  
  
  RESULTS
  Forty-nine postmenopausal women with median age 64.3 years (interquartile range 59.0-69.5 years) were included in the study. Vitamin D deficiency was detected in 49% of the participants. There was no relation between vitamin D deficiency and knee muscle strength in both right and left legs. Vitamin D deficiency was found not to be associated with any of the domains of SF-36.
  
  
  CONCLUSIONS
  Vitamin D deficiency is not related to decreased muscle strength and lowered quality of life in postmenopausal women. Other factors rather than vitamin D deficiency should be investigated for illuminating the causalities of these two common clinical conditions.
authors.affiliation: Diskapi Yildirim Beyazit Education and Research Hospital, Physical Medicine and Rehabilitation Clinic , Ankara , Turkey.
authors.forename: G M
authors.initials: GM
authors.lastname: Civelek
authors.forename: N O
authors.initials: NO
authors.lastname: Pekyavas
authors.forename: N
authors.initials: N
authors.lastname: Cetin
authors.forename: S N
authors.initials: SN
authors.lastname: Cosar
authors.forename: M
authors.initials: M
authors.lastname: Karatas
mesh_terms: D005260:Female; D006801:Humans; D057187:Independent Living / Q000523:psychology / Q000706:statistics & numerical data; D008875:Middle Aged; D053580:Muscle Strength; D053581:Muscle Strength Dynamometer; D018908:Muscle Weakness / Q000097:blood / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D017698:Postmenopause / Q000502:physiology / Q000523:psychology; D015995:Prevalence; D011788:Quality of Life; D013223:Statistics as Topic; D014421:Turkey / Q000453:epidemiology; D014807:Vitamin D / Q000031:analogs & derivatives / Q000097:blood; D014808:Vitamin D Deficiency / Q000097:blood / Q000150:complications / Q000453:epidemiology
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D
keywords: MUSCLE STRENGTH; POSTMENOPAUSAL WOMEN; QUALITY OF LIFE; VITAMIN D