METHODS:
The US National Cancer Institute Surveillance, Epidemiology and End Results Program (SEER) 1973-2010 data were analyzed; thereafter, results were meta-analyzed along with those from survival (cohort) studies examining the association between SES indices and survival from childhood leukemia (end-of-search date: March 31, 2014). Random-effects models were used to calculate pooled effect estimates (relative risks, RRs); meta-regression was also used.