Survival by age at start of dialysis across DOPPS regions. Probability of survival from start of dialysis by region and age group at dialysis start (calculated using unadjusted Cox regression within each region with delayed entry at time of study enrollment, stratified by age group, and accounting for facility clustering effects). Total number of patients = 8161, and the number of deaths = 1337. P value for 75 years versus 45 years: 0.05 in each region. Europe includes United Kingdom, France, Germany, Italy, Spain, Belgium, and Sweden; North America includes United States and Canada; ANZ represents Australia and New Zealand.