There is a screening period of up to 6 weeks, a variable treatment period for individual participants. In order to complete the treatment period simultaneously for all study participants, the minimum treatment duration may be less than 52 weeks, with a maximum treatment duration of up to 3 years after the last participant is randomized, and a post-treatment follow-up period of 4 weeks. Participants who prematurely discontinued from treatment will be expected to complete the Early Termination (ET) and End of Study (EOS) visits. Such participants will be considered non-completers, but they will be expected to participate in long-term follow-up (LTFU) for cardiovascular events (CV) of interest, vital status, and hospitalizations until overall study closure unless the participant withdrew consent for this LTFU data collection. Participants were randomized in a 2:1 ratio to receive either roxadustat or placebo in a double-blind manner.