Kidney Disease Quality of Life (KDQoL) physical component summary (PCS) and mental component summary (MCS) scores by age categories across DOPPS regions versus U.S. population norm. Cross section of participants in DOPPS III (2005 through 2007; n = 8161). Europe includes United Kingdom, France, Germany, Italy, Spain, Belgium, and Sweden; North America includes United States and Canada; ANZ represents Australia and New Zealand.