title: Evaluation of vitamin D level and grip strength recovery in women with a distal radius fracture.
abstract: OBJECTIVE
  Vitamin D is known to contribute to muscular function. The purpose of this study was to determine whether the level of vitamin D is associated with grip strength recovery in women after a distal radius fracture.
  
  
  METHODS
  We analyzed grip strength recovery after a distal radius fracture in 70 women over age 50 years. We measured vitamin D levels and grip strength recovery, which we analyzed as a function of age, surgical care, baseline vitamin D level, vitamin D supplementation, wrist range of motion, pain level, and radiographic results at 6 months. We performed multivariate analysis to identify factors that independently predicted grip strength recovery at 6 months after injury.
  
  
  RESULTS
  Grip strength of affected hands averaged 65% of the contralateral sides (range, 25% to 100%) at 6 months after injury. We found no significant correlation between baseline vitamin D level and grip strength recovery. However, baseline vitamin D level correlated with the grip strengths of uninjured sides. Multivariate analysis indicated that younger age, vitamin D supplementation, and greater wrist range of motion were independently associated with better grip strength recovery at 6 months after injury.
  
  
  CONCLUSIONS
  This study demonstrated that in women with a distal radius fracture, baseline vitamin D level is not associated with grip strength recovery in the injured hand. However, baseline vitamin D level correlated with grip strength in the uninjured hand. In addition, vitamin D supplementation may help grip strength recovery in the injured hand. Further prospective, comparative studies are warranted to confirm the effect of vitamin D supplementation on grip strength recovery.
authors: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Hui Jong
authors: HJ
authors: Lee
authors: Hyun Sik
authors: HS
authors: Gong
authors: Cheol Ho
authors: CH
authors: Song
authors: Jung Eun
authors: JE
authors: Lee
authors: Young Ho
authors: YH
authors: Lee
authors: Goo Hyun
authors: GH
authors: Baek
mesh_terms: D015331:Cohort Studies; D019587:Dietary Supplements; D005260:Female; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal / Q000379:methods*; D017102:Fracture Healing / Q000187:drug effects; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D015601:Injury Severity Score; D008875:Middle Aged; D015999:Multivariate Analysis; D011859:Radiography; D011885:Radius Fractures / Q000097:blood* / Q000000981:diagnostic imaging / Q000601:surgery; D016059:Range of Motion, Articular / Q000502:physiology*; D012016:Reference Values; D016896:Treatment Outcome; D014807:Vitamin D / Q000097:blood* / Q000627:therapeutic use; D014954:Wrist Injuries / Q000000981:diagnostic imaging / Q000601:surgery
chemical_list: D014807:Vitamin D