Participants who omitted RT were more likely than those who received RT to be 75 years or older (62.8% vs. 43.4%) and unmarried (59.9% vs. 52.2%), to have a household income lower than $40,000 (55.6% vs. 59.3%), to live in the Northeast region (19.3% vs. 13.1%), and to have stage 0 disease (42.4% vs. 20.4%), tumor grade of unknown (16.7% vs. 9.2%), progesterone receptor‐negative tumor (32.3% vs. 13.1%), and comorbidities ≥3 (50.1% vs. 41.0%). Here, PGR is linked to neoplasm.