UMIN000001176.

Study name	Randomised controlled trial of calcium supplementation
Methods	Randomised controlled trial
Participants	Healthy women aged 50‐75 years
Interventions	Calcium carbonate tablets (calcium 500 mg/day) vs placebo
Outcomes	Two‐year changes in bone mineral density of hip and vertebra SECONDARY OUTCOME: blood pressure, blood biochemical tests
Starting date	01/11/2008
Contact information	Kazutoshi Nakamura 1‐757 Asahimachi‐dori, Chuo‐ku, Niigata city, 951‐8510, JAPAN Japan 025‐227‐2125 kazun@med.niigata‐u.ac.jp NIIGATA UNIVERSITY GRADUATE SCHOOL OF MEDICAL AND DENTAL SCIENCES Department of Community Preventive Medicine, Division of Social and Environmental Medicine
Notes	http://www.who.int/trialsearch/Trial2.aspx?TrialID=JPRN‐UMIN000001176