Kevin McCarroll|David J. Robinson|A. Coughlan|Martin Healy|Rose Anne Kenny|Clodagh Cunningham
Vitamin D and orthostatic hypotension
St. James's Hospital|St. James's Hospital|Trinity College Dublin|St. James's Hospital|Trinity College Dublin|St. James's Hospital
aimed investigate potential relationship vitamin orthostatic hypotension oh casecontrol model older adultsall participants communitydwelling adults taking vitamin supplements cases subjects aged 64 older diagnosed oh falls blackout unit controls age within 5 years gendermatched subjects history blackouts falls orthostatic dizziness preceding year oh defined according standard criteria diagnosed active stand test serum vitamin 25ohd measured radioimmunoassayseventysix subjects included analysis 38 controls 38 cases twentyfour group female mean age 78 79 years subjects oh lower serum 25ohd compared controls mean difference 206 nmoll p 00002 lower vitamin status associated increased risk oh adjustment season body mass index presence stroke diabetes angina p 0035 impaired orthostatic haemodynamicsfindings suggest vitamin may play role aetiology oh studies required explore relationship