Figure 1From: A randomized controlled trial of vitamin E and selenium on rate of decline in lung function Flow of participants included in FEV 1 analysis by intervention group. 1Participants lost to follow-up defined as deaths and participants not in contact for 2 years prior to the end of supplemented time period (March 1, 2009 was used in analyses to proxy the end of supplement). 2Refusals defined as withdrawals from SELECT and/or RAS.Back to article page