1,085
Participants
Start Date
April 30, 1995
Primary Completion Date
August 31, 2003
Study Completion Date
August 31, 2003
Vitamin A + Beta Carotene
one daily oral dose of 30 mg beta-carotene + 5000 IU preformed vitamin A
Multivitamins
one daily oral dose of 20 mg thiamine (vitamin B-1), 20 mg riboflavin (vitamin B-2), 25 mg vitamin B-6, 100 mg niacin, 50 ug cobalamin (vitamin B-12), 500 mg vitamin C, 30 mg vitamin E, and 0.8 mg folic acid
Placebo
Placebo pill
Harvard School of Public Health, Boston
Muhimbili University of Health and Allied Sciences
OTHER
Harvard School of Public Health (HSPH)
OTHER